线程事件通知 & 线程方法

package ersatz.thread;
 
public class T {
  public static void main(String[] args) throws InterruptedException {
    B b = new B();
    b.start();
    Thread.sleep(5 * 1000);
    b.setLoop(false);
  }
}
 
class B extends Thread {
  private int n;
  private boolean loop = true;
 
  public void setLoop(boolean loop) {
    this.loop = loop;
  }
 
  @Override
  public void run() {
    while (loop) {
      System.out.println("B " + n++);
      try {
        Thread.sleep(1000);
      } catch (InterruptedException e) {
        e.printStackTrace();
      }
    }
 
  }
}

interrupt

package ersatz.thread;
 
public class T {
  public static void main(String[] args) throws InterruptedException {
    B b = new B();
    b.setName("uiop");
    b.setPriority(Thread.MIN_PRIORITY);
    b.start();
    for (int i = 0; i < 5; ++i) {
      Thread.sleep(1000);
      System.out.println("main thread");
    }
    System.out.println(b.getName() + " b priority " + b.getPriority());
    b.interrupt();
  }
}
 
class B extends Thread {
  @Override
  public void run() {
    while (true) {
      for (int i = 0; i < 100; ++i) {
        System.out.println(Thread.currentThread().getName() + " i = " + i);
      }
      try {
        System.out.println(Thread.currentThread().getName() + " sleeping");
        Thread.sleep(20 * 1000);
      } catch (InterruptedException e) {
        System.out.println(Thread.currentThread().getName() + " interrupted");
      }
    }
  }
}

join

package ersatz.thread;
 
public class T {
  public static void main(String[] args) throws InterruptedException {
    B b = new B();
    b.start();
    for (int i = 0; i < 8; ++i) {
      Thread.sleep(1000);
      System.out.println("Main "+i);
      if (i == 3) {
        System.out.println(b.getClass().getName()+" join");
        b.join();
        System.out.println(b.getClass().getName()+" join finish");
      }
    }
  }
}
 
class B extends Thread {
  @Override
  public void run() {
    for (int i = 0; i < 7; ++i) {
      try {
        Thread.sleep(1000);
      } catch (InterruptedException e) {
        e.printStackTrace();
      }
      System.out.println(this.getClass().getName() + ' ' + i);
    }
  }
}

Thread.yield() 礼让cpu not comple

package ersatz.thread;
 
public class T {
  public static void main(String[] args) throws InterruptedException {
    B b = new B();
    b.start();
    for (int i = 0; i < 8; ++i) {
      Thread.sleep(1000);
      System.out.println("Main "+i);
      if (i == 3) {
        System.out.println(b.getClass().getName()+" join");
//        b.join();
        Thread.yield();  // not compel
        System.out.println(b.getClass().getName()+" join finish");
      }
    }
  }
}
 
class B extends Thread {
  @Override
  public void run() {
    for (int i = 0; i < 7; ++i) {
      try {
        Thread.sleep(1000);
      } catch (InterruptedException e) {
        e.printStackTrace();
      }
      System.out.println(this.getClass().getName() + ' ' + i);
    }
  }
}

package ersatz.thread;
public class T {
  public static void main(String[] args) throws InterruptedException {
    Thread t = new Thread(new B());
    int c=0;
    do {
      System.out.println("Main " + ++c);
      if (c == 3) {
        t.start();
        t.join();
      }
      Thread.sleep(500);
    } while (c != 6);
  }
}
 
class B implements Runnable{
  private int c;
  @Override
  public void run() {
    do {
      System.out.println(this.getClass().getName() + ++c);
      try {
        Thread.sleep(500);
      } catch (InterruptedException e) {
        e.printStackTrace();
      }
    } while (c != 5);　　
  }
}

Daemon Thread

package ersatz.thread;
public class T {
  public static void main(String[] args) throws InterruptedException {
    DaemonThread daemonThread = new DaemonThread();
    daemonThread.setDaemon(true);
    daemonThread.start();
    int c=0;
    do {
      System.out.println(T.class + " "+c);
      Thread.sleep(500);
    } while (c++ != 4);
  }
}
 
class DaemonThread extends Thread{
  @Override
  public void run() {
    for (; ; ) {
      System.out.println(this.getName());
      try {
        Thread.sleep(500);
      } catch (InterruptedException e) {
        e.printStackTrace();
      }
    }
  }
}

查看线程状态

package ersatz.thread;
 
public class T {
  public static void main(String[] args) throws InterruptedException {
    B b = new B();
    System.out.println(b.getName() + " state: " + b.getState());
    b.start();
    while (b.getState() != Thread.State.TERMINATED) {
      System.out.println(b.getName() + " state: " + b.getState());
      Thread.sleep(500);
    }
    System.out.println(b.getName() + " state: " + b.getState());
  }
}
 
class B extends Thread {
  @Override
  public void run() {
    while (true) {
      for (int i = 0; i < 10; ++i) {
        System.out.println(this.getClass().getName() + ' ' + i);
        try {
          Thread.sleep(1000);
        } catch (InterruptedException e) {
          e.printStackTrace();
        }
      }
      break;
    }
  }
}