{"id":61891,"url":"https://github.com/labex-labs/java-free-tutorials","name":"java-free-tutorials","description":"Free Java tutorials for beginners with 54 interactive lessons. Easy-to-follow programming guides with hands-on practice exercises.","projects_count":57,"last_synced_at":"2026-04-09T10:00:19.774Z","repository":{"id":241206126,"uuid":"804635946","full_name":"labex-labs/java-free-tutorials","owner":"labex-labs","description":"Free Java tutorials for beginners with 54 interactive lessons. 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Designed for beginners, these Java courses provide a structured roadmap to master OOP concepts, Java syntax, and application development. Gain real-world experience by building Java applications through hands-on, practical coding exercises in an interactive Java playground.\n\n| Index | Name | Difficulty | Tutorial Link |\n|---------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------|---------------------------------------------------------------------------------------------------------------------------------------|\n| 01 | [๐Ÿ“– Introduction to Java Programming](https://labex.io/tutorials/java-introduction-to-java-programming-178546) | Advanced | [๐Ÿ”— View](https://labex.io/tutorials/java-introduction-to-java-programming-178546) |\n| 02 | [๐Ÿ“– Variables and Operators in Java](https://labex.io/tutorials/java-variables-and-operators-in-java-178553) | Intermediate | [๐Ÿ”— View](https://labex.io/tutorials/java-variables-and-operators-in-java-178553) |\n| 03 | [๐Ÿ“– Java Conditional Expressions Fundamentals](https://labex.io/tutorials/java-java-conditional-expressions-fundamentals-178545) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-java-conditional-expressions-fundamentals-178545) |\n| 04 | [๐Ÿ“– Recursion and Loops](https://labex.io/tutorials/java-recursion-and-loops-178552) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-recursion-and-loops-178552) |\n| 05 | [๐Ÿ“– Methods \u0026 Parameters and Object](https://labex.io/tutorials/java-methods-parameters-and-object-178547) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-methods-parameters-and-object-178547) |\n| 06 | [๐Ÿ“– Spy in Mockito](https://labex.io/tutorials/java-spy-in-mockito-117989) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-spy-in-mockito-117989) |\n| 07 | [๐Ÿ“– Reading a CSV File](https://labex.io/tutorials/java-reading-a-csv-file-117982) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-reading-a-csv-file-117982) |\n| 08 | [๐Ÿ“– Java Long Compare Method](https://labex.io/tutorials/java-java-long-compare-method-117868) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-java-long-compare-method-117868) |\n| 09 | [๐Ÿ“– Convert Character to Lowercase in Java](https://labex.io/tutorials/java-convert-character-to-lowercase-in-java-117580) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-convert-character-to-lowercase-in-java-117580) |\n| 10 | [๐Ÿ“– Determining Space Characters in Java](https://labex.io/tutorials/java-determining-space-characters-in-java-117547) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-determining-space-characters-in-java-117547) |\n| 11 | [๐Ÿ“– How to Find Maximum Value Map](https://labex.io/tutorials/java-how-to-find-maximum-value-map-117436) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-how-to-find-maximum-value-map-117436) |\n| 12 | [๐Ÿ“– How to Convert Enum to String](https://labex.io/tutorials/java-how-to-convert-enum-to-string-117421) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-how-to-convert-enum-to-string-117421) |\n| 13 | [๐Ÿ“– Resolving 'Could Not Find or Load Main Class' Error in Java](https://labex.io/tutorials/java-resolving-could-not-find-or-load-main-class-error-in-java-117401) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-resolving-could-not-find-or-load-main-class-error-in-java-117401) |\n| 14 | [๐Ÿ“– Convert Integer List to Int Array](https://labex.io/tutorials/java-convert-integer-list-to-int-array-117397) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-convert-integer-list-to-int-array-117397) |\n| 15 | [๐Ÿ“– Comparator and Comparable](https://labex.io/tutorials/java-comparator-and-comparable-117394) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-comparator-and-comparable-117394) |\n| 16 | [๐Ÿ“– Check if Input Is Integer](https://labex.io/tutorials/java-check-if-input-is-integer-117391) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-check-if-input-is-integer-117391) |\n| 17 | [๐Ÿ“– How to resolve 'cannot access class' error](https://labex.io/tutorials/java-how-to-resolve-cannot-access-class-error-417323) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-how-to-resolve-cannot-access-class-error-417323) |\n| 18 | [๐Ÿ“– How to get the current date and next date using LocalDate in Java](https://labex.io/tutorials/java-how-to-get-the-current-date-and-next-date-using-localdate-in-java-414036) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-how-to-get-the-current-date-and-next-date-using-localdate-in-java-414036) |\n| 19 | [๐Ÿ“– How to handle 'java.time.format.DateTimeParseException'](https://labex.io/tutorials/java-how-to-handle-java-time-format-datetimeparseexception-417320) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-how-to-handle-java-time-format-datetimeparseexception-417320) |\n| 20 | [๐Ÿ“– How to resolve 'cannot find symbol' error in Java](https://labex.io/tutorials/java-how-to-resolve-cannot-find-symbol-error-in-java-415709) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-how-to-resolve-cannot-find-symbol-error-in-java-415709) |\n| 21 | [๐Ÿ“– How to split a string into an ArrayList using a delimiter in Java](https://labex.io/tutorials/java-how-to-split-a-string-into-an-arraylist-using-a-delimiter-in-java-415655) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-how-to-split-a-string-into-an-arraylist-using-a-delimiter-in-java-415655) |\n| 22 | [๐Ÿ“– How to work with Unicode characters in Java](https://labex.io/tutorials/java-how-to-work-with-unicode-characters-in-java-414959) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-how-to-work-with-unicode-characters-in-java-414959) |\n| 23 | [๐Ÿ“– How to print a Java boolean result](https://labex.io/tutorials/java-how-to-print-a-java-boolean-result-414108) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-how-to-print-a-java-boolean-result-414108) |\n| 24 | [๐Ÿ“– How to handle invalid user input in a Java program](https://labex.io/tutorials/java-how-to-handle-invalid-user-input-in-a-java-program-414054) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-how-to-handle-invalid-user-input-in-a-java-program-414054) |\n| 25 | [๐Ÿ“– How to handle division by zero in Java programs](https://labex.io/tutorials/java-how-to-handle-division-by-zero-in-java-programs-414047) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-how-to-handle-division-by-zero-in-java-programs-414047) |\n| 26 | [๐Ÿ“– How to print variable type in Java](https://labex.io/tutorials/java-how-to-print-variable-type-in-java-421459) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-how-to-print-variable-type-in-java-421459) |\n| 27 | [๐Ÿ“– How to compare Java objects based on multiple attributes](https://labex.io/tutorials/java-how-to-compare-java-objects-based-on-multiple-attributes-417392) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-how-to-compare-java-objects-based-on-multiple-attributes-417392) |\n| 28 | [๐Ÿ“– How to configure ObjectMapper to ignore unknown properties in JSON in Java](https://labex.io/tutorials/java-how-to-configure-objectmapper-to-ignore-unknown-properties-in-json-in-java-417583) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-how-to-configure-objectmapper-to-ignore-unknown-properties-in-json-in-java-417583) |\n| 29 | [๐Ÿ“– How to read JSON file from relative path in Java](https://labex.io/tutorials/java-how-to-read-json-file-from-relative-path-in-java-417587) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-how-to-read-json-file-from-relative-path-in-java-417587) |\n| 30 | [๐Ÿ“– How to handle null values when joining Java strings](https://labex.io/tutorials/java-how-to-handle-null-values-when-joining-java-strings-417590) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-how-to-handle-null-values-when-joining-java-strings-417590) |\n| 31 | [๐Ÿ“– How to fix 'no main manifest attribute' error in Java](https://labex.io/tutorials/java-how-to-fix-no-main-manifest-attribute-error-in-java-417707) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-how-to-fix-no-main-manifest-attribute-error-in-java-417707) |\n| 32 | [๐Ÿ“– How to fix 'package does not exist' error in Java](https://labex.io/tutorials/java-how-to-fix-package-does-not-exist-error-in-java-417708) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-how-to-fix-package-does-not-exist-error-in-java-417708) |\n| 33 | [๐Ÿ“– How to set time zone for LocalDate in Java](https://labex.io/tutorials/java-how-to-set-time-zone-for-localdate-in-java-417752) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-how-to-set-time-zone-for-localdate-in-java-417752) |\n| 34 | [๐Ÿ“– How to create Java arrays with fixed size](https://labex.io/tutorials/java-how-to-create-java-arrays-with-fixed-size-418028) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-how-to-create-java-arrays-with-fixed-size-418028) |\n| 35 | [๐Ÿ“– How to manage Java project structure](https://labex.io/tutorials/java-how-to-manage-java-project-structure-419476) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-how-to-manage-java-project-structure-419476) |\n| 36 | [๐Ÿ“– Java Arrays and ArrayLists](https://labex.io/tutorials/java-java-arrays-and-arraylists-413820) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-java-arrays-and-arraylists-413820) |\n| 37 | [๐Ÿ“– Abstraction and Interface](https://labex.io/tutorials/java-abstraction-and-interface-178542) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-abstraction-and-interface-178542) |\n| 38 | [๐Ÿ“– Access Modifiers and Inheritance](https://labex.io/tutorials/java-access-modifiers-and-inheritance-178543) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-access-modifiers-and-inheritance-178543) |\n| 39 | [๐Ÿ“– Class and Object](https://labex.io/tutorials/java-class-and-object-178544) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-class-and-object-178544) |\n| 40 | [๐Ÿ“– Number, String and Array](https://labex.io/tutorials/java-number-string-and-array-178548) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-number-string-and-array-178548) |\n| 41 | [๐Ÿ“– Overloading and Overriding](https://labex.io/tutorials/java-overloading-and-overriding-178549) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-overloading-and-overriding-178549) |\n| 42 | [๐Ÿ“– Your First Java Lab](https://labex.io/tutorials/java-your-first-java-lab-411751) | Advanced | [๐Ÿ”— View](https://labex.io/tutorials/java-your-first-java-lab-411751) |\n| 43 | [๐Ÿ“– Java Data Types and Basic Operations](https://labex.io/tutorials/java-java-data-types-and-basic-operations-413744) | Intermediate | [๐Ÿ”— View](https://labex.io/tutorials/java-java-data-types-and-basic-operations-413744) |\n| 44 | [๐Ÿ“– Java Control Flow: Conditionals and Loops](https://labex.io/tutorials/java-java-control-flow-conditionals-and-loops-413751) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-java-control-flow-conditionals-and-loops-413751) |\n| 45 | [๐Ÿ“– Java Methods and Basic Object-Oriented Programming](https://labex.io/tutorials/java-java-methods-and-basic-object-oriented-programming-413809) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-java-methods-and-basic-object-oriented-programming-413809) |\n| 46 | [๐Ÿ“– How to find a word in a Java String using the indexOf() method](https://labex.io/tutorials/java-how-to-find-a-word-in-a-java-string-using-the-indexof-method-414025) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-how-to-find-a-word-in-a-java-string-using-the-indexof-method-414025) |\n| 47 | [๐Ÿ“– Java Scanner Input Challenge](https://labex.io/tutorials/java-java-scanner-input-challenge-413835) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-java-scanner-input-challenge-413835) |\n| 48 | [๐Ÿ“– Java ArrayList Shopping Cart Challenge](https://labex.io/tutorials/java-java-arraylist-shopping-cart-challenge-413849) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-java-arraylist-shopping-cart-challenge-413849) |\n| 49 | [๐Ÿ“– Java Book Class Challenge](https://labex.io/tutorials/java-java-book-class-challenge-413850) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-java-book-class-challenge-413850) |\n| 50 | [๐Ÿ“– Java Fahrenheit to Celsius Conversion](https://labex.io/tutorials/java-java-fahrenheit-to-celsius-conversion-413851) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-java-fahrenheit-to-celsius-conversion-413851) |\n| 51 | [๐Ÿ“– Java FizzBuzz Challenge](https://labex.io/tutorials/java-java-fizzbuzz-challenge-413852) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-java-fizzbuzz-challenge-413852) |\n| 52 | [๐Ÿ“– How to convert a Long to a double in Java](https://labex.io/tutorials/java-how-to-convert-a-long-to-a-double-in-java-413969) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-how-to-convert-a-long-to-a-double-in-java-413969) |\n| 53 | [๐Ÿ“– How to create a mutable List from a Java array without affecting the original array](https://labex.io/tutorials/java-how-to-create-a-mutable-list-from-a-java-array-without-affecting-the-original-array-413983) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-how-to-create-a-mutable-list-from-a-java-array-without-affecting-the-original-array-413983) |\n| 54 | [๐Ÿ“– How to create a new Java file in the terminal](https://labex.io/tutorials/java-how-to-create-a-new-java-file-in-the-terminal-413984) | Beginner | [๐Ÿ”— View](https://labex.io/tutorials/java-how-to-create-a-new-java-file-in-the-terminal-413984) |\n\n## More\n\n- ๐Ÿ”— [Java Learn more about](https://labex.io/skilltrees/java)\n- ๐Ÿ”— [Awesome Programming Courses](https://github.com/labex-labs/awesome-programming-courses)\n- ๐Ÿ”— [Awesome Programming Projects](https://github.com/labex-labs/awesome-programming-projects)\n\n","created_at":"2024-06-13T01:07:50.968Z","updated_at":"2026-04-09T10:00:19.775Z","primary_language":null,"list_of_lists":false,"displayable":true,"categories":["More","More Free Tutorials","Languages"],"sub_categories":[],"projects_url":"https://awesome.ecosyste.ms/api/v1/lists/labex-labs%2Fjava-free-tutorials/projects"}