https://github.com/calcuis/dataconvertor-java
https://github.com/calcuis/dataconvertor-java
Last synced: 3 months ago
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- Host: GitHub
- URL: https://github.com/calcuis/dataconvertor-java
- Owner: calcuis
- Created: 2023-12-17T16:36:49.000Z (over 1 year ago)
- Default Branch: main
- Last Pushed: 2023-12-17T16:43:50.000Z (over 1 year ago)
- Last Synced: 2025-01-21T13:11:49.090Z (5 months ago)
- Language: Java
- Size: 2.93 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
### Data Converter
This Java code defines a class named DataConverter with a main method and a private helper method convertData. The purpose of this program is to read data from one text file (data_file_1.txt), perform a simple conversion on the data, and then write the result to another text file (data_file_2.txt). The data in the input file is expected to be in a specific format, and any lines not adhering to this format are considered invalid.
Here's a breakdown of the code:
Import Statements:
```
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
```
These statements import classes from the java.io package, which are necessary for reading from and writing to files.
Class Declaration:
```
public class DataConverter {
```
The class is declared as public and named `DataConverter`.
`main` Method:
```
public static void main(String[] args) {
```
The `main` method is the entry point of the program. It initializes input and output file names, calls the `convertData` method, and handles any `IOException` that might occur during the conversion process.
File Names:
```
String inputFile = "data_file_1.txt";
String outputFile = "data_file_2.txt";
```
These variables store the names of the input and output files.
`try-catch` Block in main Method:
```
try {
convertData(inputFile, outputFile);
System.out.println("Conversion successful!");
} catch (IOException e) {
System.err.println("Error converting data: " + e.getMessage());
}
```
The `convertData` method is called within a try block. If an `IOException` occurs during the conversion, an error message is printed.
`convertData` Method:
```
private static void convertData(String inputFile, String outputFile) throws IOException {
```
This private method performs the actual data conversion. It takes input and output file names as parameters and is declared to throw an `IOException`.
`try-with-resources` Block in `convertData` Method:
```
try (BufferedReader reader = new BufferedReader(new FileReader(inputFile));
PrintWriter writer = new PrintWriter(new FileWriter(outputFile))) {
```
The method uses try-with-resources to automatically close the BufferedReader and PrintWriter instances after the conversion is complete.
Data Conversion:
```
String line;
while ((line = reader.readLine()) != null) {
String[] parts = line.split(",\\s*");
if (parts.length == 3) {
// Assuming the first and third columns need to be concatenated
String convertedLine = parts[0] + " " + parts[2];
writer.println(convertedLine);
} else {
System.err.println("Invalid input format: " + line);
}
}
```
The method reads each line from the input file, splits it into parts based on a comma followed by optional whitespace, and checks if there are exactly three parts. If so, it concatenates the first and third parts with a space in between and writes the result to the output file. If the input format is invalid, an error message is printed to the standard error stream.