Java多线程编程实战指南：从基础创建到线程安全同步锁

class MyThread extends Thread {

public void run() {
    System.out.println("线程执行中");
}

}

// 使用 MyThread thread = new MyThread(); thread.start();

public class Counter {

private int count = 0;

public synchronized void increment() {
    count++;
}

}