JAVA多线程

java.lang.Thread 和 java.lang.Runnable 都可以实现多线程访问！
public class MyThread extends Thread {
public MyThread(String param)
{
super(param);
}
public void run()
{
System.out.println(this.getName()+"线程开始了");
for(int i=0;i<20;i++)
{
try
{
System.out.println(i+"==="+this.getName());
sleep((int) Math.random() * 10);//休眠时间
}catch(Exception ex)
{
ex.printStackTrace();
}
}
System.out.println(getName() + " 线程运行结束!");
}

}
//第二种实现方式
public class MyRunnable implements Runnable {

public static void main(String args[]) throws Exception
{
System.out.println(Thread.currentThread().getName()+"线程开始了");
MyRunnable myrun=new MyRunnable();
Thread thread1=new  Thread(myrun);
Thread thread2=new  Thread(myrun);
thread1.run();
thread2.run();
System.out.println(Thread.currentThread().getName()+"线程结束了");
}
@Override
public void run() {
System.out.println(Thread.currentThread().getName()+"线程开始了");
for(int i=0;i<20;i++)
{
try
{
System.out.println(i+"==="+Thread.currentThread().getName());
Thread.sleep((int) Math.random() * 10);//休眠时间
}catch(Exception ex)
{
ex.printStackTrace();
}
}
System.out.println(Thread.currentThread().getName() + " 线程运行结束!");
}
}