class MyThread extends Thread{//继承Thread类，作为线程的实现类
    private String name ;
 public MyThread(String name){
     this.name = name ;
 }
    public void run(){//覆写run()方法，作为线程的操作主体
     for (int i=0;i<10;i++ ){
   System.out.println(name + "运行，i = " +i);
     }
 }
}
public class ThreadDemo02{
 public static void main(String args[]){
     MyThread mt1 = new MyThread("线程A");//实例化对象
  MyThread mt2 = new MyThread("线程c");//实例化对象
  mt1.start();//调用线程主体
  mt2.start();
 }
}

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运行结果：

D:\threaddemo>java ThreadDemo02
D:\threaddemo>java ThreadDemo02
线程A运行，i = 0
线程A运行，i = 1
线程A运行，i = 2
线程A运行，i = 3
线程A运行，i = 4
线程A运行，i = 5
线程A运行，i = 6
线程A运行，i = 7
线程A运行，i = 8
线程A运行，i = 9
线程c运行，i = 0
线程c运行，i = 1
线程c运行，i = 2
线程c运行，i = 3
线程c运行，i = 4
线程c运行，i = 5
线程c运行，i = 6
线程c运行，i = 7
线程c运行，i = 8
线程c运行，i = 9