写两个线程，一个线程打印1-52，另一个线程打印A-Z，打印顺序为12A34B56C......5152Z

题目：

写两个线程，一个线程打印1-52，另一个线程打印A-Z，打印顺序为12A34B56C......5152Z。要求用线程间的通信。

/** * 写两个线程，第一个线程打印1-52，第二个线程打印A-Z，打印结果为12A34B...5152Z */public class ThreadPrinter {    // true打印数字，false打印字母    private boolean flag = true;

    // 打印字母    public synchronized void printNumber(String s) {        try {            if (!flag) {                super.wait();            }            System.out.print(s);            flag = false;            super.notifyAll();        } catch (InterruptedException ex) {        }    }

    // 打印数字    public synchronized void printLetter(String s) {        try {            if (flag) {                super.wait();            }            System.out.print(s);            flag = true;            super.notifyAll();        } catch (InterruptedException ex) {        }    }

    /**     *线程2:打印A-Z     */    public static class LetterPrintThread extends Thread {        private ThreadPrinter printer;

        private LetterPrintThread(String name, ThreadPrinter printer) {            super(name);            this.printer = printer;        }

        @Override        public void run() {            for (int i = 1; i <= 26; i++) {                int temp = i + 64;                char c = (char) temp;                printer.printLetter(c + " ");            }        }

    }

    /**线程1:打印1-52*/    public static class NumberPrintThread extends Thread {        private ThreadPrinter printer;

        private NumberPrintThread(String name, ThreadPrinter printer) {            super(name);            this.printer = printer;        }        @Override        public void run() {            for (int i = 1; i <= 26; i++) {                String s = (2 * i - 1) + " " + 2 * i + " ";                printer.printNumber(s);            }

        }    }

    public static void main(String[] args) {        ThreadPrinter printer = new ThreadPrinter();        new NumberPrintThread("打印数字线程", printer).start();        new LetterPrintThread("打印字母线程", printer).start();    }}

原文地址：https://www.cnblogs.com/cdlyy/p/12061029.html