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Create threads in Java

Thread 클래스 상속


static class MyThread extends Thread{
        @Override
        public void run() {
            System.out.println("MyThread running");
            System.out.println("MyThread finished");
        }
    }

    public static void main(String[] args) {
        Thread thread = new MyThread();
        thread.start();
    }

Thread 생성 with Runnable을 인자로 가지는 생성자


static class MyTask implements Runnable{
        @Override
        public void run() {
            System.out.println("MyTask Running");
            System.out.println("MyTask Finishing");
        }
    }

    public static void main(String[] args) {
        Thread thread = new Thread(new MyTask());
        thread.start();
    }


public static void main(String[] args) {
    Thread thread = new Thread(new Runnable() {
        @Override
        public void run() {
            System.out.println("MyTask Running");
            System.out.println("MyTask Finishing");
        }
    });
    thread.start();
}


public static void main(String[] args) {
    Thread thread = new Thread(() -> {
        System.out.println("MyTask Running");
        System.out.println("MyTask Finishing");
    });
    thread.start();
}

실행중인 Thread 객체의 참조를 얻는법


Thread currentThread = Thread.currentThread()

Join a thread - wait for the Java Thread to terminate


public class ThreadExample10 {

    public static void main(String[] args) {
        Runnable runnable = () ->{
            for (int i = 0; i < 5; i++) {
sleep(1000);
                System.out.println("Running");
            }
        };

        Thread thread = new Thread( runnable );
        thread.setDaemon(true);
        thread.start();
    }

    private static void sleep(int millis) {
        try {
            Thread.sleep(millis);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}
//메인 쓰레드가 실행 동시에 종료 되기 때문에 아무것도 출력되지 않고 프로그램이 종료된다.


public class ThreadExample10 {

    public static void main(String[] args) {
        Runnable runnable = () ->{
            for (int i = 0; i < 5; i++) {
sleep(1000);
                System.out.println("Running");
            }
        };

        Thread thread = new Thread( runnable );
        thread.setDaemon(true);
        thread.start();

        try {
            thread.join();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

    private static void sleep(int millis) {
        try {
            Thread.sleep(millis);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}
//Main Thread는 자식 쓰레드가 종료 될 때까지 Blocked 된다.
//Running 5회 출력!

Create, starting and stopping threads in Java

Create threads in Java

실행중인 Thread 객체의 참조를 얻는법

Join a thread - wait for the Java Thread to terminate