单选题class Work implements Runnable {  Thread other;   Work(Thread other) { this.other = other; }  public void run() {  try { other.join(); } catch (Exception e) { }  System.out.print("after join ");  } }  class Launch {  public static void main(String [] a

题目
单选题
class Work implements Runnable {  Thread other;   Work(Thread other) { this.other = other; }  public void run() {  try { other.join(); } catch (Exception e) { }  System.out.print("after join ");  } }  class Launch {  public static void main(String [] args) {  new Thread(new Work(Thread.currentThread())).start();  System.out.print("after start ");  } }  结果为:()
A

after join

B

after start

C

after join after start

D

after start after join

参考答案和解析
正确答案: C
解析: 暂无解析
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相似问题和答案

第1题:

public class Threads3 implements Runnable {  public void run() {  System.out.print(”running”);  }  public static void main(String[] args) {  Thread t = new Thread(new Threads3());  t.run();  t.run();  t.start();  }  }  What is the result?() 

  • A、 Compilation fails.
  • B、 An exception is thrown at runtime.
  • C、 The code executes and prints “running”.
  • D、 The code executes and prints “runningrunning”.
  • E、 The code executes and prints “runningrunningrunning”.

正确答案:E

第2题:

现有:  class ThreadExcept implements Runnable  {  public void run()  {  throw new RuntimeException("exception ");  }  public static void main(Stri_ng  []  args)  {  new  Thread (new  ThreadExcept()).start();  try  {  int x=Integer.parselnt (args [0]);  Thread. sleep (x);  System.out.print("main");  } catch (Exception e)  {  }  }  }  和命令行:  java ThreadExcept l000     哪一个是结果?()    

  • A、main
  • B、编译失败
  • C、main java.lang.RuntimeException: exception
  • D、代码运行,但没有输出

正确答案:C

第3题:

通过实现Rmmable接口创建线程,请在下面横线处填写代码完成此程序。

public class ThreadTest

{

public static void main(String args [])

{

Thread testObj1 = new Thread (new Hello ());

Thread testObj2 = new Thread (new Hello ());

testObj 2.start ( );

}

}

class Hello implements Runnable

{

int j;

public void run()

{

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

}

}


正确答案:testObj 1.start();
testObj 1.start();

第4题:

public class TestOne implements Runnable {  public static void main (String[] args) throws Exception {  Thread t = new Thread(new TestOne());  t.start();  System.out.print(”Started”);  t.join();  System.out.print(”Complete”);  }  public void run() {  for (int i= 0; i< 4; i++) {   System.out.print(i);  }  }  }  What can be a result?()

  • A、 Compilation fails.
  • B、 An exception is thrown at runtime.
  • C、 The code executes and prints “StartedComplete”.
  • D、 The code executes and prints “StartedComplete0123”.
  • E、 The code executes and prints “Started0l23Complete”.

正确答案:E

第5题:

class ThreadExcept implements Runnable {   public void run() { throw new RuntimeException("exception "); }   public static void main(String [] args) {   new Thread(new ThreadExcept()).start();   try {   int x = Integer.parseInt(args[0]);   Thread.sleep(x);   System.out.print("main ");    } catch (Exception e) { }      }  }   和命令行:  java ThreadExcept 1000    哪一个是结果?()  

  • A、 main
  • B、 编译失败
  • C、 代码运行,但没有输出
  • D、 main java.lang.RuntimeException:exception

正确答案:D

第6题:

public class Threads5 {  public static void main (String[] args) {  new Thread(new Runnable() {  public void run() {  System.out.print(”bar”);  } }).start();  }  }  What is the result?() 

  • A、 Compilation fails.
  • B、 An exception is thrown at runtime.
  • C、 The code executes normally and prints “bar”.
  • D、 The code executes normally, but nothing prints.

正确答案:C

第7题:

public class A extends Thread {  A() {  setDaemon(true);  }  public void run() {  (new B()).start();  try {  Thread.sleep(60000);  } catch (InterruptedException x) {}  System.out.println(“A done”);  }  class B extends Thread {  public void run() {  try {  Thread.sleep(60000);  } catch (InterruptedException x) {}  System.out.println(“B done”);  }  }  public static void main(String[] args) {  (new A()).start();  }  }   What is the result?()  

  • A、 A done
  • B、 B done
  • C、 A done B done
  • D、 B done A done
  • E、 There is no exception that the application will print anything.
  • F、 The application outputs “A done” and “B done”, in no guaranteed order.

正确答案:B

第8题:

classWorkimplementsRunnable{Threadother;Work(Threadother){this.other=other;}publicvoidrun(){try{other.join();}catch(Exceptione){}System.out.print("afterjoin");}}classLaunch{publicstaticvoidmain(String[]args){newThread(newWork(Thread.currentThread())).start();System.out.print("afterstart");}}结果为:()

A.afterjoin

B.afterstart

C.afterjoinafterstart

D.afterstartafterjoin


参考答案:D

第9题:

现有:   class Thread2 implements Runnable {   void run() {   System.out.print("go ");   }   public static void main(String [] args) {   Thread2 t2 = new Thread2();   Thread t = new Thread(t2);   t.start();   }   }   结果为:()

  • A、 go
  • B、 编译失败
  • C、 代码运行,无输出结果
  • D、 运行时异常被抛出

正确答案:B

第10题:

class Waiting implements Runnable {  boolean flag = false;  public synchronized void run() {  if (flag) {  flag = false;  System.out.print("1 ");  try { this.wait(); } catch (Exception e) { }  System.out.print("2 ");  }  else {  flag = true;  System.out.print("3 ");  try { Thread.sleep(2000); } catch (Exception e) { }  System.out.print("4 ");  notify();  }  }  public static void main(String [] args) {  Waiting w = new Waiting();  new Thread(w).start();  new Thread(w).start ();  }  }  以下哪两项是正确的?() 

  • A、代码输出 1 3 4
  • B、代码输出 3 4 1
  • C、代码输出 1 2 3 4
  • D、代码不会完成

正确答案:A,B

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