请阅读下面程序,说明该程序创建线程使用的方法是( )。 public class ThreadTest { public static void main(String args[]) { Thread tl=new Thread(new HolloWorld); Thread t2=new Thread(new HolloWorld); tl.start; t2.Start; } } class HolloWorld implements Runnable { int i; public void run { while(true) { System.out.println("HolloWorld"+i++); if(i= =5)break; } } }A.继承Thread类B.实现Runnable接口C.tl.startD.t2.start

请阅读下面程序,说明该程序创建线程使用的方法是( )。 public class ThreadTest { public static void main(String args[]) { Thread tl=new Thread(new HolloWorld); Thread t2=new Thread(new HolloWorld); tl.start; t2.Start; } } class HolloWorld implements Runnable { int i; public void run { while(true) { System.out.println("HolloWorld"+i++); if(i= =5)break; } } }

A.继承Thread类

B.实现Runnable接口

C.tl.start

D.t2.start


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试题八(共15分)阅读以下说明和Java程序代码,将应填入(n) 处的字句写在答题纸的对应栏内。[说明]在下面的 Java 程序代码中,类SalesTicket 能够完成打印票据正文的功能,类HeadDecorator 与FootDecorator 分别完成打印票据的台头和脚注的功能。已知该程序运行后的输出结果如下所示,请填补该程序代码中的空缺。这是票据的台头!这是票据正文!这是票据的脚注!------------------------这是票据的台头!这是票据的脚注![Java程序代码]public class SalesTicket {public void printTicket() {System.out.println("这是票据正文!");}}public class Decorator extends SalesTicket{SalesTicket ticket;}}public class FootDecorator extends Decorator{public FootDecorator(SalesTicket t) {(2) ;}public void printTicket() {super.printTicket();System.out.println("这是票据的脚注!");}}public class Main {public static void main(String[] args) {T = new HeadDecorator( (3) );T. (4) ;System.out.println("------------------------");T = new FootDecorator( (5) );T.printTicket();}}public Decorator(SalesTicket t){ticket = t;}public void printTicket(){if(ticket != null)ticket.printTicket();}}public class HeadDecorator extends Decorator{public HeadDecorator(SalesTicket t) {(1) ;}public void printTicket() {System.out.println("这是票据的台头!");super.printTicket();

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