multiThreading

https://www.cnblogs.com/pureEve/p/6524366.html

创建新线程

https://www.cnblogs.com/xwlych/p/5988507.html

线程同步与互斥

https://blog.csdn.net/dazhong159/article/details/7927034

https://www.cnblogs.com/mithrandirw/p/8942335.html

java中的sleep()和wait()的区别

https://www.cnblogs.com/hongten/p/hongten_java_sleep_wait.html

public class Main {
    static int sum =1000;
    static int a=0;
    static int b=0;
    static int flag=0;
    public static void main(String[] args) {
        Thread1 thread1=new Thread1("a");
        thread1.setPriority(3);
        Thread1 thread2=new Thread1("b");
        thread2.setPriority(7);        
        thread2.start();
        thread1.start();
    }    
    private static class Thread1 extends Thread{
        public Thread1(String name) {
            super(name);
        }
        @Override
        public void run(){
            while(sum>0){
                synchronized (Main.class) {            
                    if(getName()=="a") {
                        a++;
                        sum--;
                        System.out.println("a:"+a);
                        System.out.println("sum:"+sum);
                    }
                    else if(getName()=="b") {
                        b++;
                        sum--;
                        System.out.println("b:"+b);
                        System.out.println("sum:"+sum);
                    }
                    if(sum<=100&&flag==1) {
                        Main.class.notify();
                        flag=2;
                        System.out.println("end-----------------------------------------------------");
                    }
                    if(sum<=900&&flag==0) {
                        if(getName()=="b") {
                            System.out.println("start------------------------------------------------");
                            flag=1;
                            try {
                                Main.class.wait();
                            } catch (InterruptedException e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                            }
                        }
                    }
                }
            }          
        }
    }
}