article/java/线程.md

import java.util.concurrent.atomic.AtomicInteger;

public class AlternatePrint {
    // 使用原子整数作为共享变量，初始值为1表示轮到线程1打印第一个数字
    private static AtomicInteger turn = new AtomicInteger(1);
    // 当前要打印的数字
    private static int currentNumber = 1;
    // 定义终止条件
    private static final int MAX_NUMBER = 100;
    
    public static void main(String[] args) {
        // 创建两个线程
        Thread thread1 = new Thread(() -> {
            while (currentNumber <= MAX_NUMBER) {
                // 线程1检查是否轮到自己
                if (turn.get() == 1) {
                    System.out.println("线程1: " + currentNumber);
                    // 切换到线程2
                    turn.set(2);
                }
                // 短暂休眠以避免CPU过度使用
                try {
                    Thread.sleep(10);
                } catch (InterruptedException e) {
                    Thread.currentThread().interrupt();
                    return;
                }
            }
        });
        
        Thread thread2 = new Thread(() -> {
            while (currentNumber <= MAX_NUMBER) {
                // 线程2检查是否轮到自己
                if (turn.get() == 2) {
                    System.out.println("线程2: " + currentNumber);
                    // 增加当前数字
                    currentNumber++;
                    // 切换回线程1
                    turn.set(1);
                }
                // 短暂休眠
                try {
                    Thread.sleep(10);
                } catch (InterruptedException e) {
                    Thread.currentThread().interrupt();
                    return;
                }
            }
        });
        
        // 启动线程
        thread1.start();
        thread2.start();
        
        // 等待线程结束
        try {
            thread1.join();
            thread2.join();
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
        }
        
        System.out.println("所有数字打印完毕");
    }
}