Java - create thread

In this article, we would like to show how to create thread in Java.

Quick solution:

Thread thread = new Thread(() -> {
    // ...
    // put your logic here ...
    // ...
});

thread.start();

Practical example

In the below source codes System.out.println("Executed in thread.") is executed in thread that was created by programmer.

1. Using lambda expression

public class Program {

	public static void main(String[] args) {

        Thread thread = new Thread(() -> {
            for (int i = 0; i < 3; ++i) {
                System.out.println("Executed in thread.");
            }
        });
        thread.start();
	}
}

Output:

Executed in thread.
Executed in thread.
Executed in thread.

2. Using anonymous class

package com.example.demo;

public class Program {

	public static void main(String[] args) {

        Thread thread = new Thread(new Runnable() {
            @Override
            public void run() {
                for (int i = 0; i < 3; ++i) {
                    System.out.println("Executed in thread.");
                }
            }
        });
        thread.start();
	}
}

Output:

Executed in thread.
Executed in thread.
Executed in thread.

3. Using separated class

Program.java file:

package com.example.demo;

public class Program {

	public static void main(String[] args) {

        Thread thread = new Thread(new SomeRunner());
        thread.start();
	}
}

Output:

Executed in thread.
Executed in thread.
Executed in thread.

SomeRunner.java file:

package com.example.demo;

public class SomeRunner implements Runnable {

    @Override
    public void run() {
        for (int i = 0; i < 3; ++i) {
            System.out.println("Executed in thread.");
        }
    }
}