两个线程,一个线程打印1-52,另一个打印A-Z,打印顺序为12A34B56C....5152Z._两个线程一个输出1-52,另一个输出a-z-优快云博客

本文链接：https://blog.youkuaiyun.com/Xrj_int/article/details/115082362

本文介绍了一个Java程序，通过创建两个线程，一个打印1到52的数字，另一个打印英文字母A到Z，确保它们交替输出。使用了`synchronized`关键字和`wait/notify`机制来实现线程间的协调。

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/*
两个线程,一个线程打印1-52,另一个打印A-Z,打印顺序为12A34B56C....5152Z.
 */
public class PrintTwo {
    public static void main(String[] args) {
        Print print = new Print();
        IntThread intThread = new IntThread(print);
        LetterThread letterThread = new LetterThread(print);
        intThread.start();
        letterThread.start();
    }
}

class IntThread extends Thread {
    private Print print;

    public IntThread(Print print) {
        this.print = print;
    }

    @Override
    public void run() {
        print.printInt();
    }
}

class LetterThread extends Thread {
    private Print print;

    public LetterThread(Print print) {
        this.print = print;
    }

    @Override
    public void run() {
        print.printLetter();
    }
}

class Print {
    private boolean flag = true;

    public synchronized void printInt() {
        int i = 1;
        while (i < 53) {
            if (!flag) {
                try {
                    wait();
                    flag = true;
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }else {
                System.out.print(i);
                i++;
                if((i-1)%2==0){
                    flag = false;
                    notify();
                }
            }
        }
    }
    public synchronized void printLetter() {
        char i = 'A';
        while (i <= 'Z') {
            if (flag) {
                try {
                    wait();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }else {
                System.out.print(i);
                i++;
                flag = true;
                notify();
                }
            }
        }
}