</> Java Example Programs

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runnable examples.

Clear explanations, complete source code and sample output — from your first program to OOP, collections, threads and data structures.

ArrayList.java

ArrayList<String> list = new ArrayList<>();
list.add("Java");

Main.java

public class Main {
  public static void main(String[] args) {
    System.out.println("Hello, Java!");
  }
}

Thread.java

new Thread(() -> {
  System.out.println("Run");
}).start();

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Learn Linked List in Java with explanation, complete source code, step-by-step walkthrough and sample output.

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Java Basics

Start with your first Java program, data types, variables and operators — each topic includes runnable code and sample output.

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Control flow with if/else, switch, loops, jump statements and Java access specifiers.

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Work with arrays and strings — creation, traversal, manipulation and common utilities.

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String comparison, concatenation, substring, reverse and character handling.

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Object-oriented Java — inheritance, polymorphism, interfaces, exceptions, collections, threads and I/O.

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Miscellaneous

Patterns, conversions, calculations and assorted useful Java programs.

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Stacks, queues, linked lists, searching and sorting algorithms in Java.

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Stack, queue, linked list and binary search implementations.

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Learn Java with runnable examples.

Popular Programs

Default Access Specifier Example in Java

Simple Array Example in Java

My First Java Example in Java

If Example in Java

Area of Circle Example in Java

Celsius to Fahrenheit Example in Java

Int Datatype Example in Java

Simple Queue Example in Java

Exception Handling Example in Java

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