多线程资源竞争 --交叉打印数字和字母

package com.java.main.test.thread;

public class TestThread {
    
    public static Object object = new Object();
    public static void main(String[] args) {
        //TestThread testThread = new TestThread();
        //new Thread(new CharThread(testThread)).start();
        //new Thread(new NumThread(testThread)).start();
        new Thread(new PrintChar()).start();
        new Thread(new PrintNum()).start();
    }
    
    /*public static void main(String[] args) {
        // TODO Auto-generated method stub
        ExecutorService service = Executors.newFixedThreadPool(2);
        service.execute(new Runnable() {
 
            @Override
            public void run() {
                // TODO Auto-generated method stub
                int i = 0;
                for (; i < 26; i++) {
                    System.out.print(i);
                    Thread.yield();
                }
            }
        });
        service.execute(new Runnable() {
            char[] cs = new char[] { 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h',
                    'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't',
                    'u', 'v', 'w', 'x', 'y', 'z' };
 
            @Override
            public void run() {
                // TODO Auto-generated method stub
                int i = 0;
                for (; i < 26; i++) {
                    System.out.print(cs[i]);
                    Thread.yield();
                }
            }
        });
 
    }
    */
    
    static class PrintChar implements Runnable{
        public void printChar(){
            for (int i = 'a'; i <= 'z'; i++) {
                synchronized(object){
                    System.out.print((char)i);
                    object.notifyAll();
                    try {
                        object.wait();
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            }
        }

        @Override
        public void run() {
            printChar();
        }
    }
    
    static class PrintNum implements Runnable{
        public void printNum(){
            for (int i = 0; i <= 26; i++) {
                synchronized(object){
                    System.out.print(i+1);
                    object.notifyAll();
                    try {
                        object.wait();
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            }
        }
        
        @Override
        public void run() {
            printNum();
        }
    }
    


}