Runnable接口实现方式共享变量很方便

package com.cskaoyan.a;

public class Test1 implements Runnable {

    int count=0;
    public static void main(String[] args) {
        
        Test1 test1 = new Test1();
        Thread t1 = new Thread(test1);
        Thread t2 = new Thread(test1);
        
        t1.start();
        t2.start();
    }

    @Override
    public void run() {

        for (int i = 0; i < 100; i++) {
            count++;
            System.out.println(Thread.currentThread().getName()+"--"+count);
        }
    }
}

Thread方式共享变量比较费劲，需要一个内部类

package com.cskaoyan.a;

public class Test2 {

   int count=0;

   public static void main(String[] args) {
       
       InnerClass innerClass = new Test2().new InnerClass();
       InnerClass thread = innerClass.getThread();
       InnerClass thread2 = innerClass.getThread();
       thread.start();
       thread2.start();
   }

   private class InnerClass extends Thread{
       @Override
       public void run() {

           
           for (int i = 0; i < 100; i++) {
               count++;
               System.out.println(currentThread().getName()+"--"+count);
           }
       }
       InnerClass getThread(){
           return new InnerClass();
       }
   }
   
}