[单选题]

( 24 )请阅读下面程序

public class ThreadTest {

public static void main ( String args[ ]){

Thread t1 = new Thread ( new Hello ()):

Thread t2 = new Thread ( new Hello ()):

t l .start ():

t2.start ();

class Hello implements Runnable {

int i ;

public void run (){

while ( true ) {

System.out.println ( "Hello"+i++ ) ;

if ( i=5 ) break :

}

该程序创建线程使用的方法是()

A. )继承 Thread 类

B. )实现 Runnable 接口

C. ) t l.start ()

D. ) t2.start ()

参考答案与解析:

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