https://github.com/xmi1an/java
BCA Sem 5 Java Practicals
https://github.com/xmi1an/java
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BCA Sem 5 Java Practicals
- Host: GitHub
- URL: https://github.com/xmi1an/java
- Owner: xmi1an
- Created: 2021-12-05T15:00:47.000Z (about 4 years ago)
- Default Branch: master
- Last Pushed: 2021-12-29T15:30:16.000Z (almost 4 years ago)
- Last Synced: 2025-10-13T06:05:57.291Z (2 months ago)
- Language: Java
- Size: 64.5 KB
- Stars: 1
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
[1. Write a Java Program find the area of circle.](#1-write-a-java-program-find-the-area-of-circle)
[2. Write a Java Program that will display factorial of the given number.](#2-write-a-java-program-that-will-display-factorial-of-the-given-number)
[3. Write a Java Program that will find the largest no from the given two nos.](#3-write-a-java-program-that-will-find-the-largest-no-from-the-given-two-nos)
[4. Write a Java Program that will find the largest no from the given three nos.](#4-write-a-java-program-that-will-find-the-largest-no-from-the-given-three-nos)
[5. Write a Java Program that shows the use of switch Statement.](#5-write-a-java-program-that-shows-the-use-of-switch-statement)
[6. Write a Java Program to find the sum of the digits of given number.](#6-write-a-java-program-to-find-the-sum-of-the-digits-of-given-number)
[7. Write a Java Program that will display the Sum of 1+1/2+1/3.....+1/n.](#7-write-a-java-program-that-will-display-the-sum-of-112131n)
[8. Write a Java Program that check weather the given no is prime or not.](#8-write-a-java-program-that-check-weather-the-given-no-is-prime-or-not)
[9. Write a Java Program that implements the use of break statement.](#9-write-a-java-program-that-implements-the-use-of-break-statement)
[10. Write a Java Program that implements the use of continue statement.](#10-write-a-java-program-that-implements-the-use-of-continue-statement)
[11. Write a Java Program that will accept Command-line Arguments and display the same.](#11-write-a-java-program-that-will-accept-command-line-arguments-and-display-the-same)
[12. Write a Java Program to sort the elements of an array in Ascending Order.](#12-write-a-java-program-to-sort-the-elements-of-an-array-in-ascending-order)
[13. Write a Java Program to create a Student class and generate result of student (Total, Per, Grade).](#13-write-a-java-program-to-create-a-student-class-and-generate-result-of-student-total-per-grade)
[14. Write a Java Program to create an Employee class and generate Salary Slip for the employee.](#14-write-a-java-program-to-create-an-employee-class-and-generate-salary-slip-for-the-employee)
[15. Write a java program which shows the use of Static Members.](#15-write-a-java-program-which-shows-the-use-of-static-members)
[16. Write a java program which shows the Nesting of Methods.](#16-write-a-java-program-which-shows-the-nesting-of-methods)
[17. Write a java program which shows the use of Methods Overloading.](#17-write-a-java-program-which-shows-the-use-of-methods-overloading)
[18. Write a java program which implements the Default Constructors.](#18-write-a-java-program-which-implements-the-default-constructors)
[19. Write a java program which implements the Parameterized Constructors.](#19-write-a-java-program-which-implements-the-parameterized-constructors)
[20. Write a java program which implements the Overloading of Constructors.](#20-write-a-java-program-which-implements-the-overloading-of-constructors)
[21. Write a java program which explains the concept of Single Inheritance.](#21-write-a-java-program-which-explains-the-concept-of-single-inheritance)
[22. Write a java program which explains the concept of Multilevel Inheritance.](#22-write-a-java-program-which-explains-the-concept-of-multilevel-inheritance)
[23. Write a java program which explains the concept of Hierarchical Inheritance.](#23-write-a-java-program-which-explains-the-concept-of-hierarchical-inheritance)
[24. Write a java program which shows the Method Overriding.](#24-write-a-java-program-which-shows-the-method-overriding)
[25. Write a Java Program to implement final class and final method.](#25-write-a-java-program-to-implement-final-class-and-final-method)
[26. Write a Java Program to implement abstract class and abstract method.](#26-write-a-java-program-to-implement-abstract-class-and-abstract-method)
[27. Write a java program which implements Interface.](#27-write-a-java-program-which-implements-interface)
[28. Write a java program which implements Multiple Interfaces.](#28-write-a-java-program-which-implements-multiple-interfaces)
[29. Write a java program which shows importing of classes from other packages.](#29-write-a-java-program-which-shows-importing-of-classes-from-other-packages)
[30. Write a Java Program to implement the methods of Math Class.](#30-write-a-java-program-to-implement-the-methods-of-math-class)
[31. Write a Java Program to implement the methods of String Class.](#31-write-a-java-program-to-implement-the-methods-of-string-class)
[32. Write a Java Program to implement the methods of Vector Class.](#32-write-a-java-program-to-implement-the-methods-of-vector-class)
[33. Write a Java Program to implement the methods of Stack Class.](#33-write-a-java-program-to-implement-the-methods-of-stack-class)
[34. Write a Java Program which will read a text and count all occurrences of a particular word.](#34-write-a-java-program-which-will-read-a-text-and-count-all-occurrences-of-a-particular-word)
[35. Write a Java Program which will read a string and rewrite it in the alphabetical order. eg.The word “STRING” should be written a “GINRST”.](#35-write-a-java-program-which-will-read-a-string-and-rewrite-it-in-the-alphabetical-order-egthe-word-string-should-be-written-a-ginrst)
[36. Write a java program which creates threads using the Thread Class.](#36-write-a-java-program-which-creates-threads-using-the-thread-class)
[37. Write a java program which shows the use of yield(), stop() and sleep() Methods.](#37-write-a-java-program-which-shows-the-use-of-yield-stop-and-sleep-methods)
[38. Write a java program which shows the Priority in Threads.](#38-write-a-java-program-which-shows-the-priority-in-threads)
[39. Write a java program which use of Runnable Interface.](#39-write-a-java-program-which-use-of-runnable-interface)
[40. Write a java program which uses try and catch for Exception Handling.](#40-write-a-java-program-which-uses-try-and-catch-for-exception-handling)
[41. Write a java program which uses Multiple catch Blocks.](#41-write-a-java-program-which-uses-multiple-catch-blocks)
[42. Write a java program which uses finally Statement.](#42-write-a-java-program-which-uses-finally-statement)
[43. Write a java program which uses Nested try Statements.](#43-write-a-java-program-which-uses-nested-try-statements)
[44. Write a java program which shows throwing our own Exception.](#44-write-a-java-program-which-shows-throwing-our-own-exception)
[45. Create an Applet program that print Hello Applet.](#45-create-an-applet-program-that-print-hello-applet)
[46. Create an applet that use init(),start(),stop() and destroy() methods of applet.](#46-create-an-applet-that-use-initstartstop-and-destroy-methods-of-applet)
[47. write an applet program to implement the concept of passing parameter to applet.](#47-write-an-applet-program-to-implement-the-concept-of-passing-parameter-to-applet)
[48. Write a applet program to implement various methods of Graphics class.](#47-write-an-applet-program-to-implement-the-concept-of-passing-parameter-to-applet)
---
### 1. Write a Java Program find the area of circle.
```java
import java.util.Scanner;
class areacircle {
int r;
void getdata() {
Scanner in = new Scanner(System.in);
System.out.print("Enter radius:");
r = in.nextInt();
}
void findarea() {
double area, PI = 3.14;
area = PI * r * r;
System.out.println("Area of circle is:" + area);
}
}
class java1 {
public static void main(String args[]) {
areacircle c1 = new areacircle();
c1.getdata();
c1.findarea();
}
}
```
### 2. Write a Java Program that will display factorial of the given number.
```java
import java.util.Scanner;
class factorial
{
int fact=1,no,i;
void getdata()
{
Scanner in=new Scanner(System.in);
System.out.print("Enter no for find factorial:");
no=in.nextInt();
}
void findarea()
{
for(i=1;i<=no;i++)
fact=fact\*i;
System.out.println("Factorial of given no is:"+fact);
}
}
class java2 {
public static void main(String args[]) {
factorial f1 = new factorial();
f1.getdata();
f1.findarea();
}
}
```
### 3. Write a Java Program that will find the largest no from the given two nos.
```java
import java.util.Scanner;
class java3
{
public static void main(String args[])
{
int no1,no2;
Scanner in=new Scanner(System.in);
System.out.println("Enter no1:");
no1=in.nextInt();
System.out.println("Enter no2:");
no2=in.nextInt();
if(no1>no2)
{
System.out.println("no1 is larger");
}
else
{
System.out.println("no2 is larger");
}
}
}
```
### 4. Write a Java Program that will find the largest no from the given three nos.
```java
import java.util.Scanner;
class java4 {
public static void main(String args[]) {
int a, b, c;
Scanner in = new Scanner(System.in);
System.out.println("Enter value of a:");
a = in.nextInt();
System.out.println("Enter value of b:");
b = in.nextInt();
System.out.println("Enter value of c:");
c = in.nextInt();
if (a > b) {
if (a > c) {
System.out.println("value of a is larger");
} else {
System.out.println("value of c is larger");
}
} else {
if (b > c) {
System.out.println("value of b is larger");
} else {
System.out.println("value of c is larger");
}
}
}
}
```
### 5. Write a Java Program that shows the use of switch Statement.
```java
import java.util.Scanner;
class java5
{
public static void main(String args[])
{
int choice;
Scanner in=new Scanner(System.in);
System.out.println("Enter choice:");
choice=in.nextInt();
switch(choice)
{
case 1: System.out.println("This is chocie 1");
break;
case 2: System.out.println("This is chocie 2");
break;
case 3: System.out.println("This is chocie 3");
break;
case 4: System.out.println("This is chocie 4");
break;
case 5: System.out.println("This is chocie 5");
break;
default: System.out.println("Please enter right choice");
}
}
}
```
### 6. Write a Java Program to find the sum of the digits of given number.
```java
import java.util.Scanner;
class java6 {
public static void main(String args[]) {
Scanner in = new Scanner(System.in);
int no, i, a, sum = 0;
System.out.println("Enter the no:");
no = in.nextInt();
while (no != 0) {
a = no % 10;
no = no / 10;
sum = sum + a;
}
System.out.println("Sum of the digit is:" + sum);
}
}
```
### 7. Write a Java Program that will display the Sum of 1+1/2+1/3.....+1/n.
```java
import java.util.Scanner;
class java7 {
public static void main(String args[]) {
int no, i, a = 1;
float sum = 0;
Scanner in = new Scanner(System.in);
System.out.println("Enter no:");
no = in.nextInt();
for (i = 1; i <= no; i++) {
System.out.print(i + "+" + a + "/");
sum = sum + 1.0f / i;
}
System.out.println("Sum is:" + sum);
}
}
```
### 8. Write a Java Program that check weather the given no is prime or not.
```java
import java.util.Scanner;
class java8
{
public static void main(String args[])
{
int no,i,flag=0;
Scanner in=new Scanner(System.in);
System.out.println("Enetr the no:");
no=in.nextInt();
for(i=2;i<=no/2;i++)
{
if(no%i==0)
{
flag=1;
break;
}
}
if(flag==0)
{
System.out.print("no is prime");
}
else
{
System.out.print("no is not prime");
}
}
}
```
### 9. Write a Java Program that implements the use of break statement.
```java
import java.util.Scanner;
class java9 {
public static void main(String args[]) {
int no, i;
Scanner in = new Scanner(System.in);
System.out.println("Enter the no:");
no = in.nextInt();
for (i = 1; i <= no; i++) {
if (i == 5) {
break;
}
System.out.println(i);
}
}
}
```
### 10. Write a Java Program that implements the use of continue statement.
```java
import java.util.Scanner;
class java10 {
public static void main(String args[]) {
int no, i;
Scanner in = new Scanner(System.in);
System.out.println("Enetr the no:");
no = in.nextInt();
for (i = 1; i <= no; i++) {
if (i == 11) {
continue;
}
System.out.println(i);
}
}
}
```
### 11. Write a Java Program that will accept Command-line Arguments and display the same.
```java
class java11 {
public static void main(String args[]) {
for (String s : args) {
System.out.println(s);
}
}
}
```
### 12. Write a Java Program to sort the elements of an array in Ascending Order.
```java
import java.util.Scanner;
class java12 {
public static void main(String args[]) {
Scanner in = new Scanner(System.in);
int i, j, element, temp, no;
int arr[] = new int[10];
System.out.println("Enter the number of an array:- ");
no = in.nextInt();
for (i = 1; i <= no; i++) {
System.out.println("Enter the element:");
arr[i] = in.nextInt();
}
for (i = 1; i <= no; i++) {
for (j = i; j <= no; j++) {
if (arr[i] > arr[j]) {
temp = arr[i];
arr[i] = arr[j];
arr[j] = temp;
}
}
}
System.out.println("Sorted list in ascending order:");
for (i = 1; i <= no; i++) {
System.out.println(arr[i]);
}
}
}
```
### 13. Write a Java Program to create a Student class and generate result of student (Total, Per, Grade).
```java
import java.util.Scanner;
class Student
{
int java,se,ec,net,t;
float per;
String result,grd;
void getmarks()
{
Scanner in=new Scanner(System.in);
System.out.println("Enter the java marks:");
java=in.nextInt();
System.out.println("Enter the software engineering marks:");
se=in.nextInt();
System.out.println("Enter the e-commerce marks:");
ec=in.nextInt();
System.out.println("Enter the net framework marks:");
net=in.nextInt();
}
void total()
{
t=java+se+ec+net;
System.out.println("From Total 400 get:"+t);
}
void percentage()
{
per=t/4;
System.out.println("Percentage:"+per);
}
void result()
{
if(java<35 || se<35 || ec<35 || net<35)
{
System.out.println(result="Fail");
}
else
{
System.out.println(result="Pass");
}
}
void grade()
{
if(result=="Pass")
{
if(per>=70.0 || per<=100.0)
{
System.out.println("Student Grade:A");
}
else if(per>=60.0 || per<70.0)
{
System.out.println("Student Grade:B");
}
else if(per>=50.0 || per<60.0)
{
System.out.println("Student Grade:C");
}
else if(per>=40.0 || per<50.0)
{
System.out.println("Student Grade:D");
}
else if(per>=35.0 || per<40.0)
{
System.out.println("Student Grade:E");
}
}
else
{
System.out.println("Student Grade:E");
}
}
}
class java13 {
public static void main(String args[]) {
Student s1 = new Student();
s1.getmarks();
s1.total();
s1.percentage();
s1.result();
s1.grade();
}
}
```
### 14. Write a Java Program to create an Employee class and generate Salary Slip for the employee.
```java
import java.util.Scanner;
class empsalary
{
String name;
int id,salary,t,p,h;
Scanner in=new Scanner(System.in);
void heading()
{
String s="Employee Salary Sleep";
System.out.println("\t\t"+s);
}
void underline()
{
System.out.println("-----------------------------------------------");
}
void getdata()
{
System.out.println("Enter emp name:");
name=in.nextLine();
System.out.println("Enter emp ID:");
id=in.nextInt();
System.out.println("Enter emp salary:");
salary=in.nextInt();
}
void pflogic()
{
int pf=5;
p=salary*pf/100;
System.out.println("\t\tEmployee salary pf is:"+p);
}
void tddalogic()
{
int td=10;
t=salary*td/100;
System.out.println("\t\tEmployee salary tdda is:"+t);
}
void hralogic()
{
int hr=12;
h=salary*hr/100;
System.out.println("\t\tEmployee salary hra is:"+h);
}
void totalsalary()
{
int total;
total=salary-p+t+h;
System.out.println("The total salary of employee is:"+total);
}
void alldisplay()
{
System.out.println("\t\tEmployee id:"+id);
System.out.println("\t\tEmployee name:"+name);
System.out.println("\t\tEmployee salary:"+salary);
}
void nesting()
{
underline();
heading();
underline();
getdata();
heading();
underline();
alldisplay();
pflogic();
tddalogic();
hralogic();
underline();
underline();
totalsalary();
underline();
}
}
class java14 {
public static void main(String args[]) {
empsalary emp1 = new empsalary();
empsalary emp2 = new empsalary();
empsalary emp3 = new empsalary();
emp1.nesting();
emp2.nesting();
emp3.nesting();
}
}
```
### 15. Write a java program which shows the use of Static Members.
```java
import java.util.Scanner;
class staticmembers {
static String sem = "Semester 5";
String name;
int rno;
void rno() {
Scanner in = new Scanner(System.in);
System.out.println("Enter rollno:-");
rno = in.nextInt();
}
}
class java15 {
public static void main(String args[]) {
staticmembers s1 = new staticmembers();
s1.rno();
String a = staticmembers.sem;
System.out.println("Your semester of BCA is:-" + a);
}
}
```
### 16. Write a java program which shows the Nesting of Methods.
```java
import java.util.Scanner;
class nesting {
Scanner in = new Scanner(System.in);
int a, b;
void getdata() {
System.out.println("Enter first value:-");
a = in.nextInt();
System.out.println("Enter second value:-");
b = in.nextInt();
}
void putdata() {
int sum;
sum = a + b;
System.out.println("The sum is:-" + sum);
}
void nestingmethod() {
getdata();
putdata();
}
}
class java16 {
public static void main(String args[]) {
nesting n1 = new nesting();
n1.nestingmethod();
}
}
```
### 17. Write a java program which shows the use of Methods Overloading.
```java
class overloading {
int x, y;
void mul(int a) {
x = a;
System.out.println("The number is:" + x);
}
void mul(int a, int b) {
x = a;
y = b;
System.out.println("The numbers are:" + a + " and " + b);
}
}
class java17 {
public static void main(String args[]) {
overloading o1 = new overloading();
o1.mul(4);
o1.mul(5, 6);
}
}
```
### 18. Write a java program which implements the Default Constructors.
```java
class dconstructor {
dconstructor() {
System.out.println("Hi!!! kds I am default constructor");
}
}
class java18 {
public static void main(String args[]) {
dconstructor d1 = new dconstructor();
}
}
```
### 19. Write a java program which implements the Parameterized Constructors.
```java
class pconstructor {
pconstructor(int x, int y) {
System.out.println("Hi! I am parameterized constructor");
int a, b, c;
a = x;
b = y;
c = a + b;
System.out.println("The sum is:" + c);
}
}
class java19 {
public static void main(String args[]) {
pconstructor p1 = new pconstructor(10, 20);
}
}
```
### 20. Write a java program which implements the Overloading of Constructors.
```java
class oconstructor {
oconstructor() {
System.out.println("Hi! I am default constructor");
}
oconstructor(int x) {
int a = x;
int b;
b = a * a;
System.out.println("The return value from single arg constructor:" + b);
}
oconstructor(int p, int q) {
int j, k, s;
j = p;
k = q;
s = j * k;
System.out.println("The return value from double args constructor:" + s);
}
}
class java20
{
public static void main(String args[]) {
oconstructor o1 = new oconstructor();
oconstructor o2 = new oconstructor(4);
oconstructor o3 = new oconstructor(4, 5);
}
}
```
### 21. Write a java program which explains the concept of Single Inheritance.
```java
import java.util.Scanner;
class Singleinheritance
{
Scanner in=new Scanner(System.in);
String sname,hobby,sem;
int rno;
void student()
{
System.out.println("Enter Student Name:");
sname=in.nextLine();
System.out.println("Enter Student Hoby:");
hobby=in.nextLine();
System.out.println("Enter Student Semester:");
sem=in.nextLine();
System.out.println("Enter Student Rno:");
rno=in.nextInt();
}
}
class Sports extends Singleinheritance {
int sw;
void extra() {
System.out.println("Enter Student Sport weightage:");
sw = in.nextInt();
}
}
class java21 {
public static void main(String args[]) {
Sports s1 = new Sports();
s1.student();
s1.extra();
}
}
```
### 22. Write a java program which explains the concept of Multilevel Inheritance.
```java
import java.util.Scanner;
class ClassA {
Scanner in = new Scanner(System.in);
String sname;
int rno;
void getdata() {
System.out.println("Enter Student Name:");
sname = in.nextLine();
System.out.println("Enter Student Rno:");
rno = in.nextInt();
}
}
class ClassB extends ClassA {
int marks;
void total() {
System.out.println("Enter Student marks:");
marks = in.nextInt();
}
}
class ClassC extends ClassB {
int sw;
void extra() {
System.out.println("Enter Student Sport weightage:");
sw = in.nextInt();
}
}
class java22 {
public static void main(String args[]) {
ClassC c1 = new ClassC();
c1.getdata();
c1.total();
c1.extra();
}
}
```
### 23. Write a java program which explains the concept of Hierarchical Inheritance
```java
import java.util.Scanner;
class Grandfather {
Scanner in = new Scanner(System.in);
String gfname;
void gf() {
System.out.println("Hii! This is grand father class");
System.out.println("Enter GrandFather's Name:");
gfname = in.nextLine();
}
}
class Father extends Grandfather {
String fname;
void father() {
System.out.println("Hii! This is father class from Grandfather class");
System.out.println("Enter Father's Name:");
fname = in.nextLine();
}
}
class Uncle extends Grandfather {
String uname;
void uncle() {
System.out.println("Hii! This is uncle class from Grandfather class");
System.out.println("Enter Uncle's Name:");
uname = in.nextLine();
}
}
class Son extends Father {
String sname;
void son() {
System.out.println("Hii! This is Son class from Father class");
System.out.println("Enter Son's Name:");
sname = in.nextLine();
}
}
class Daughter extends Uncle {
String dname;
void daughter() {
System.out.println("Hii! This is Daughter class from Uncle class");
System.out.println("Enter Daughter's Name:");
dname = in.nextLine();
}
}
class java23 {
public static void main(String args[]) {
Son s1 = new Son();
s1.gf();
s1.father();
s1.son();
Daughter d1 = new Daughter();
d1.gf();
d1.uncle();
d1.daughter();
}
}
```
### 24. Write a java program which shows the Method Overriding.
```java
class Super {
int x;
Super(int a) {
x = a;
}
void display() {
System.out.println("Super x:" + x);
}
}
class Sub extends Super {
int y;
Sub(int a, int b) {
super(a);
y = b;
}
void display() {
System.out.println("Super x:" + x);
System.out.println("Sub y:" + y);
}
}
class java24 {
public static void main(String args[]) {
Sub s1 = new Sub(100, 200);
s1.display();
}
}
```
### 25. Write a Java Program to implement final class and final method.
```java
class Superr {
final int x;
Superr(final int a) {
x = a;
}
final void display() {
System.out.println("Super x:" + x);
}
}
class Subb {
int y;
Subb(int a, int b) {
super(x);
y = b;
}
void display()// Display method must not override in the subclass of superclass.
{
System.out.println("Super x:" + x);
System.out.println("Sub y:" + y);
}
}
class java25 {
public static void main(String args[]) {
Subb s1 = new Subb(100, 300);
s1.display();
}
}
```
### 26. Write a Java Program to implement abstract class and abstract method.
```java
abstract class Super {
int x;
Super(int a) {
x = a;
}
void display() {
System.out.println("Super x:" + x);
}
}
class Sub extends Super {
int y;
Sub(int a, int b) {
super(a);
y = b;
}
void display() {
System.out.println("Super x:" + x);
System.out.println("Sub y:" + y);
}
}
class java26 {
public static void main(String args[]) {
Sub s1 = new Sub(100, 200);
s1.display();
}
}
```
### 27. Write a java program which implements Interface.
```java
interface Area {
final static float pi = 3.14f;
float compute(float x, float y);
}
class Rectangle implements Area {
public float compute(float x, float y) {
return (x \* y);
}
}
class Circle implements Area {
public float compute(float x, float y) {
return (pi _ x _ x);
}
}
class java27 {
public static void main(String args[]) {
Rectangle r1 = new Rectangle();
Circle c1 = new Circle();
Area a1;
a1 = r1;
System.out.println("Area of Rectangle:" + a1.compute(10, 20));
a1 = c1;
System.out.println("Area of Circle:" + a1.compute(10, 0));
}
}
```
### 28. Write a java program which implements Multiple Interfaces.
```java
class Student {
int rno;
void getno(int n) {
rno = n;
}
void putno() {
System.out.println("Roll no:" + rno);
}
}
class Test extends Student {
float part1, part2;
void getmarks(float f1, float f2) {
part1 = f1;
part2 = f2;
}
void putmarks() {
System.out.println("Marks Obtained");
System.out.println("Marks part 1:" + part1);
System.out.println("Marks part 2:" + part2);
}
}
interface Sports {
float spwt = 6.0f;
void putwt();
}
class Result extends Test implements Sports {
float total;
public void putwt() {
System.out.println("Sports weight:" + spwt);
}
void display() {
total = part1 + part2 + spwt;
putno();
putmarks();
putwt();
System.out.println("Total is:" + total);
}
}
class java28 {
public static void main(String args[]) {
Result s1 = new Result();
s1.getno(120);
s1.getmarks(50.50f, 60.60f);
s1.display();
}
}
```
### 29. Write a java program which shows importing of classes from other packages.
> Save as java29.java
```java
import pack1.*;
public class java29 {
public static void main(String[] args) {
java29part2 obj = new java29part2();
obj.msg();
}
}
```
> Save as java29part2.java
```java
package pack1;
public class java29part2 {
public void msg() {
System.out.println("Hello");
}
}
```
### 30. Write a Java Program to implement the methods of Math Class.
```java
import java.util.Scanner;
class java30 {
public static void main(String args[]) {
Scanner in = new Scanner(System.in);
double x, z = 30;
System.out.println("Enter value:");
x = in.nextDouble();
double s = Math.sin(x);
System.out.println("The sin function return value is:" + s);
double c = Math.cos(x);
System.out.println("The cos function return value is:" + c);
double rt = Math.sqrt(x);
System.out.println("The sqrt function return value is:" + rt);
double t = Math.tan(x);
System.out.println("The tan function return value is:" + t);
double p = Math.pow(x, z);
System.out.println("The pow function return value is:" + p);
double at2 = Math.atan2(x, z);
System.out.println("The atan2 function return value is:" + at2);
double a = Math.atan(z);
System.out.println("The atan function return value is:" + a);
double m = Math.max(x, z);
System.out.println("The max function return value is:" + m);
double mn = Math.min(x, z);
System.out.println("The min function return value is:" + mn);
double l = Math.log(x);
System.out.println("The log function return value is:" + l);
double f = Math.floor(x);
System.out.println("The floor function return value is:" + f);
double e = Math.exp(x);
System.out.println("The exp function return value is:" + e);
double ab = Math.abs(x);
System.out.println("The abs function return value is:" + ab);
double r = Math.round(x);
System.out.println("The round function return value is:" + r);
double cl = Math.ceil(x);
System.out.println("The ceil function return value is:" + cl);
}
}
```
### 31. Write a Java Program to implement the methods of String Class.
```java
import java.lang.\*;
class java31 {
public static void main(String args[]) {
String s1 = "Java";
String s2 = "Progrmming Language";
String s3, s4;
int s, n = 2;
s3 = s1.toLowerCase();
System.out.println(s3);
s3 = s2.toUpperCase();
System.out.println(s3);
s = s2.length();
System.out.println(s);
s4 = s3.replace("s1", "s2");
System.out.println(s4);
s3 = s1.trim();
System.out.println(s3);
s4 = s1.concat(s2);
System.out.println(s4);
s4 = s1.toString();
System.out.println(s4);
s4 = s2.substring(2);
System.out.println(s4);
s4 = s2.substring(2, 4);
System.out.println(s4);
if (s1.equals(s2)) {
System.out.println("s1 equal to s2");
} else {
System.out.println("s1 not equal s2");
}
if (s1.equalsIgnoreCase(s2)) {
System.out.println("s2 strings are equal");
} else {
System.out.println("s2 Strings are not equal");
}
if (s1.compareTo(s2) > 0) {
System.out.println("s2 string is alphabetically greater");
} else {
System.out.println("s2 string is alphabetically lesser");
}
String str = "car insurance";
System.out.println(str.indexOf("u"));
}
}
```
### 32. Write a Java Program to implement the methods of Vector Class.
```java
import java.util.\*;
public class java32n {
public static void main(String[] args) {
Vector v1 = new Vector();
v1.add(1);
v1.add(2);
v1.add("Java");
v1.add(3);
v1.remove(3);
v1.addElement("Last Element");
v1.insertElementAt("First Element", 0);
System.out.println("Vector v1 is " + v1);
System.out.println("The element at 2nd index : " + v1.elementAt(2));
System.out.println("The capacity is: " + v1.capacity());
}
}
```
### 33. Write a Java Program to implement the methods of Stack Class.
```java
import java.util.\*;
public class java33
{
public static void main(String args[])
{
// creating stack
Stack st = new Stack();
// populating stack
st.push("Java");
st.push("Source");
st.push("code");
st.push("My java");
st.push("my code");
System.out.println("Added object is: "+st);
// removing top object
System.out.println("Removed object is: "+st.pop());
// elements after remove
System.out.println("Elements after remove: "+st.pop());
System.out.println("Elements after remove: "+st.pop());
System.out.println("Elements after remove: "+st);
}
}
```
### 34. Write a Java Program which will read a text and count all occurrences of a particular word.
```java
import java.io.*;
class java34 {
public static void main(String as[]) throws Exception {
InputStreamReader isr = new InputStreamReader(System.in);
BufferedReader br = new BufferedReader(isr);
int i = 0, count = 0;
String text = "", s = "";
System.out.println("Enter Text:(press ENTER twice to stop)\n");
s = br.readLine();
while (s.length() != 0) {
text += s;
s = br.readLine();
}
System.out.println("Enter search word:");
s = br.readLine();
while (true) {
i = text.indexOf(s, i);
if (i == -1)
break;
System.out.println("Word found at position:" + i);
count++;
i += s.length();
}
System.out.println("Number of occurrences of given word:" + count);
}
}
```
### 35. Write a Java Program which will read a string and rewrite it in the alphabetical order. eg.The word “STRING” should be written a “GINRST”.
```java
import java.util.Arrays;
import java.util.Scanner;
public class java35n {
public static void main(String args[]) {
Scanner sc = new Scanner(System.in);
System.out.println("Enter a string value: ");
String str = sc.nextLine();
char charArray[] = str.toCharArray();
Arrays.sort(charArray);
System.out.println(new String(charArray));
}
}
```
### 36. Write a java program which creates threads using the Thread Class.
```java
class A extends Thread {
public void run() {
for (int i = 1; i <= 5; i++) {
System.out.println("\tFrom ThreadA : i=" + i);
}
System.out.println("Exit from A");
}
}
class B extends Thread {
public void run() {
for (int j = 1; j <= 5; j++) {
System.out.println("\tFrom ThreadB : j=" + j);
}
System.out.println("Exit from B");
}
}
class C extends Thread {
public void run() {
for (int k = 1; k <= 5; k++) {
System.out.println("\tFrom ThreadC : k=" + k);
}
System.out.println("Exit from C");
}
}
class java36 {
public static void main(String args[]) {
new A().start();
new B().start();
new C().start();
}
}
```
### 37. Write a java program which shows the use of yield(), stop() and sleep() Methods.
```java
class A extends Thread {
public void run() {
for (int i = 1; i <= 5; i++) {
if (i == 1)
yield();
System.out.println("\tFrom ThreadA : i=" + i);
}
System.out.println("Exit from A");
}
}
class B extends Thread {
public void run() {
for (int j = 1; j <= 5; j++) {
System.out.println("\tFrom ThreadB : j=" + j);
if (j == 3)
stop();
}
System.out.println("Exit from B");
}
}
class C extends Thread {
public void run() {
for (int k = 1; k <= 5; k++) {
System.out.println("\tFrom ThreadC : k=" + k);
if (k == 1)
try {
sleep(1000);
}
catch (Exception e) {
}
}
System.out.println("Exit from C");
}
}
public class java37 {
public static void main(String args[]) {
A threadA = new A();
B threadB = new B();
C threadC = new C();
System.out.println("Start Thread A");
threadA.start();
System.out.println("Start Thread B");
threadB.start();
System.out.println("Start Thread C");
threadC.start();
System.out.println("End of main Thread");
}
}
```
### 38. Write a java program which shows the Priority in Threads.
```java
class A extends Thread {
public void run() {
System.out.println("ThreadA Started");
for (int i = 1; i <= 4; i++) {
System.out.println("\tFrom ThreadA : i=" + i);
}
System.out.println("Exit from A");
}
}
class B extends Thread {
public void run() {
System.out.println("ThreadB Started");
for (int j = 1; j <= 4; j++) {
System.out.println("\tFrom ThreadB : j=" + j);
}
System.out.println("Exit from B");
}
}
class C extends Thread {
public void run() {
System.out.println("ThreadC Started");
for (int k = 1; k <= 4; k++) {
System.out.println("\tFrom ThreadC : k=" + k);
}
System.out.println("Exit from C");
}
}
class java38 {
public static void main(String args[]) {
A threadA = new A();
B threadB = new B();
C threadC = new C();
threadC.setPriority(Thread.MAX_PRIORITY);
threadB.setPriority(threadA.getPriority() + 1);
threadA.setPriority(Thread.MIN_PRIORITY);
System.out.println("Start Thread A");
threadA.start();
System.out.println("Start Thread B");
threadB.start();
System.out.println("Start Thread C");
threadC.start();
System.out.println("End of main Thread");
}
}
```
### 39. Write a java program which use of Runnable Interface.
```java
class X implements Runnable {
public void run() {
System.out.println("ThreadC Started");
for (int i = 1; i <= 10; i++) {
System.out.println("\tThreadX : " + i);
}
System.out.println("End of ThreadX");
}
}
class java39 {
public static void main(String args[]) {
X runnable = new X();
Thread threadX = new Thread(runnable);
threadX.start();
System.out.println("End of main Thread");
}
}
```
### 40. Write a java program which uses try and catch for Exception Handling.
```java
class java40 {
public static void main(String args[]) {
int a = 10, b = 5, c = 5, x, y;
try {
x = a / (b - c);
} catch (ArithmeticException e) {
System.out.println("The number cannot divide by zero");
}
y = a / (b + c);
System.out.println("The answer is:" + y);
}
}
```
### 41. Write a java program which uses Multiple catch Blocks.
```java
class java41 {
public static void main(String args[]) {
int a[] = { 5, 10 };
int b = 5;
try {
int x = a[2] / a[0] - b;
} catch (ArithmeticException e) {
System.out.println("The number cannot divide by zero");
} catch (ArrayIndexOutOfBoundsException e) {
System.out.println("Array index error");
} catch (ArrayStoreException e) {
System.out.println("The wrong data type");
}
int y = a[1] / a[0];
System.out.println("The division of y is:" + y);
}
}
```
### 42. Write a java program which uses finally Statement.
```java
class java42 {
public static void main(String args[]) {
int a[] = { 10, 10 };
int b = 10;
try {
int x = a[0] / b - a[2];
}
catch (ArithmeticException e) {
System.out.println("Number cannot divide by zero");
} catch (ArrayIndexOutOfBoundsException e) {
System.out.println("Array index Out Of Bound Error");
} finally {
int y = a[0] / a[1];
System.out.println("Answer:" + y);
}
}
}
```
### 43. Write a java program which uses Nested try Statements.
```java
class java43 {
public static void main(String args[]) {
int a[] = { 10, 10 };
int b = 10, c = 5;
try {
if (b != c) {
try {
int x = a[2] / b - a[1];
} catch (ArithmeticException e) {
System.out.println("The number is cannot divide");
} catch (ArrayIndexOutOfBoundsException e) {
System.out.println("The Array index errors occur");
}
}
} catch (ArithmeticException e) {
System.out.println("The number is cannot divide");
} catch (ArrayIndexOutOfBoundsException e) {
System.out.println("The Array index error");
} finally {
int y = a[1] / (b - c);
System.out.println("The answer:" + y);
}
}
}
```
### 44. Write a java program which shows throwing our own Exception.
```java
import java.lang.Exception;
class MyException extends Exception {
MyException(String message) {
super(message);
}
}
class java44 {
public static void main(String args[]) {
int b = 500, c = 10;
try {
float z = (float) c / (float) b;
if (z < 0.05) {
throw new MyException("Number is too small");
}
} catch (MyException e) {
System.out.println("Caught my exception");
System.out.println(e.getMessage());
} finally {
System.out.println("I am always here...........");
}
}
}
```
### 45. Create an Applet program that print Hello Applet.
```java
import java.applet._;
import java.awt._;
public class java45 extends Applet {
public void paint(Graphics g) {
g.drawString("Hello Applet", 50, 50);
}
}
//
```
### 46. Create an applet that use init(),start(),stop() and destroy() methods of applet.
```java
import java.applet.Applet;
import java.awt.Graphics;
public class java46 extends Applet {
public void init() {
System.out.println("1.I am init()");
}
public void start() {
System.out.println("2.I am start()");
}
public void paint(Graphics g) {
System.out.println("3.I am paint()");
}
public void stop() {
System.out.println("4.I am stop()");
}
public void destroy() {
System.out.println("5.I am destroy()");
}
}
```
### 47. write an applet program to implement the concept of passing parameter to applet.
```java
import java.applet.Applet;
import java.awt.Graphics;
public class java47 extends Applet {
public void paint(Graphics g) {
String str = getParameter("msg");
g.drawString(str, 50, 50);
}
}
//
//
//
```
### 48. Write a applet program to implement various methods of Graphics class.
```java
import java.applet.Applet;
import java.awt.\*;
//
//
public class java48 extends Applet {
public void paint(Graphics g) {
g.setColor(Color.red);
g.drawString("Welcome", 50, 50);
g.drawLine(20, 30, 20, 300);
g.drawRect(70, 100, 30, 30);
g.fillRect(170, 100, 30, 30);
g.drawOval(70, 200, 30, 30);
g.setColor(Color.pink);
g.fillOval(170, 200, 30, 30);
g.drawArc(90, 150, 30, 30, 30, 270);
g.fillArc(270, 150, 30, 30, 0, 180);
}
}
```