//示例1

import java.lang.Thread;
import java.lang.InterruptedException;

class Test1 extends Thread{
 public void run(){
  
  try{
   for(int i=0;i<10;i++){
    System.out.println("正在做第1件事情。。。。");
    this.sleep(500);
   }
   System.out.println("1.....Over.**************************");
  }
  catch(InterruptedException ex){
   ex.printStackTrace();
  }
   
 }
}

class Test2 extends Thread{
 public void run(){
  try{
   for(int i=0;i<10;i++){
    System.out.println("正在做第2件事情。。。。");
    this.sleep(500);
   }
   System.out.println("2.....Over.**************************");
  }
  catch(InterruptedException ex){
   ex.printStackTrace();
  }
 }
}
public class ThreadDemo{
 public static void main(String args[]){
  Test1 t1=new Test1();
  Test2 t2=new Test2();
     t1.start();
     t2.start();
 }
}

//示例2

import java.lang.Runnable;
import java.lang.InterruptedException;
//import java.lang.Thread;
class Test1 implements Runnable{
 public void run(){
  try{
   for(int i=0;i<10;i++){
    System.out.println("在做第1件事情。。。"); 
    Thread.sleep(500);
   }
   System.out.println(" 1..Over ***********************");
  }
  catch(InterruptedException ex){
   ex.printStackTrace();
  }
 }
}
class Test2 implements Runnable{
 public void run(){
  try{
    for(int i=0;i<10;i++){
    System.out.println("在做第2件事情。。。"); 
    Thread.sleep(500);
   }
   System.out.println(" 2..Over ***********************");
  }
  catch(InterruptedException ex){
   ex.printStackTrace();
  }
 }
}
public class RunnableDemo{
 public static void main(String args[]){
  Test1 t1=new Test1();
  Test2 t2=new Test2();
  Thread thread1=new Thread(t1);
  Thread thread2=new Thread(t2);
  thread1.start();
  thread2.start();
 }
}

//示例3，同步

import java.lang.Thread;
import java.lang.InterruptedException;
class Test extends Thread{
 String who;
 DoTest obj;
 public Test(){
 }
 public Test(String who,DoTest obj){
  this.who=who;
  this.obj=obj;
 }
 public void run(){
  
  this.obj.gotoSchool(this.who);
   
 }
 
}

class DoTest{
  //同步方法
     synchronized void gotoSchool(String who)
     {
       try
       {
          System.out.println(who+"上卫生间....请稍候... ");
          Thread.sleep(2000); //上卫生间蹲2秒
          System.out.println(who+"上卫生间 完毕 \n");
       }  
      catch(InterruptedException e)
      {
           System.out.println("中断");
      }
  &nbs