JavaSE 多线程 Part2

–原作者:尚硅谷-佟刚

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package com.atweihai.thread;

/**
 * 利用多线程:交替打印字母a-z 
 *
 */
public class PrintLetters  implements Runnable{

    char ch='a';

    public synchronized void  print (){



            //防止打印字母z后面的字符
            if(ch<='z'){
                 System.out.println(Thread.currentThread().getName() +": "+ ch);
                 ch++; 

                 notify();
                 try {
                        wait();
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }     
            }


    }

    @Override
    public void run() {
        while(ch<='z'){
            print();
        }
    }

    public static void main(String[] args) {
        PrintLetters printLetters=new PrintLetters();

        Thread th1=new Thread(printLetters);
        Thread th2=new Thread(printLetters);

        th1.setName("线程-1");
        th2.setName("线程-2");

        th1.start();
        th2.start();
    }

}

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