public class MyThread3 {	private int i;	private synchronized void increase(){		i++;		System.out.println(Thread.currentThread().getName()+"-increase:"+i);	}	private synchronized void decrease(){		i--;		System.out.println(Thread.currentThread().getName()+"-decrease:"+i);	}	class Inc implements Runnable{		public void run(){			for(int j=0;i<100;j++){				increase();			}		}	}		class Dec implements Runnable{		public void run(){			for(int j=0;j<100;j++){				decrease();			}		}	}	public static void main(String args[]){		MyThread3 tt= new MyThread3();		Inc inc =tt.new Inc();		Dec dec = tt.new Dec();		for(int j=0;j<2;j++){			Thread t =new  Thread(inc);			t.start();			t=new  Thread(dec);			t.start();		}			}}