多选题public class Threads2 implements Runnable {  public void nun() {  System.out.println(”run.”);  throw new RuntimeException(”Problem”);  }  public static void main(String[] args) {  Thread t = new Thread(new Threads2());  t.start();  System.out.println(”

题目
多选题
public class Threads2 implements Runnable {  public void nun() {  System.out.println(”run.”);  throw new RuntimeException(”Problem”);  }  public static void main(String[] args) {  Thread t = new Thread(new Threads2());  t.start();  System.out.println(”End of method.”);  }  }  Which two can be results?()
A

java.lang.RuntimeException: Problem

B

run.    java.lang.RuntimeException: Problem

C

End of method.    java.lang.RuntimeException: Problem

D

End of method.      run.      java.lang.RuntimeException: Problem

E

run.    java.lang.RuntimeException: Problem     End of method.


相似考题
参考答案和解析
正确答案: C,A
解析: 暂无解析
更多“public class Threads2 implements Runnable {  public void nun”相关问题
  • 第1题:

    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()); t1.start(); t2.start(); } } class Hello implements Runnable { int i; public void run() { while(true) { System.out.prinfin("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.t1.start()

    D.t2.start()


    正确答案:B
    解析:本题考查线程的创建。Java中,线程的创建有两种方法:
      (1)通过实现Runnable接口创建线程。Runnable接口中只定义了一个run()方法作为线程体。
      (2)通过继承Thread类创建线程。Thread类本身实现了Runnable接口。
      无论使用哪种方法来创建线程,新建的线程不会自动运行,必须调用线程的start()方法,才能运行该线程。
      本题程序中的Hello类实现了Runnable接口,即采用的是第一种方法创建线程。因此,本题的正确答案是选项B。

  • 第2题:

    通过实现Runnable接口创建线程,请在下面横线处填入代码完成此程序。

    注意:不改动程序结构,不得增行或删行。

    class ThreadTest implements Runnable

    {

    Thread thrObj;

    public static void main(String args[])

    {

    System.out.println("这是一个通过实现接口创建线程的例子");

    ThreadTest testObj=new ThreadTest();

    testObj.create();

    }

    public void create()

    {

    if(thrObj= =null)

    {

    thrObj=new Thread(this,"myThread");

    ______

    }

    }

    public void run()

    {

    System.out.println("Thread"+throbj.getName()+":"+"在运行!");

    }

    }


    正确答案:thrObj.start();
    thrObj.start(); 解析:本题考查考生对如何通过实现Runnable接口创建线程及使用线程的掌握,这是一道简单应用题。程序中,ThreadTest类实现了Runnable接口,所以ThreadTest类必须重写Runnable接口中的run()方法。在create()方法创建了一个名为thrObj的线程,并调用Thread类中的start()方法启动该线程。语句thrObj=new Thread(this,"myThread");中,this是Thread构造方法的第一个参数,作为该线程的目标对象,它必须实现Runnable接口。第二个参数 myTread为线程的名称。在这种构造方法下,线程thrObj就以目标对象中的run()方法作为自己的run()方法,本例中,目标对象就是ThreadTest类的对象。

  • 第3题:

    interface A{

    int x = 0;

    }

    class B{

    int x =1;

    }

    class C extends B implements A {

    public void pX(){

    System.out.println(x);

    }

    public static void main(String[] args) {

    new C().pX();

    }

    }


    正确答案:

     

    错误。在编译时会发生错误(错误描述不同的JVM 有不同的信息,意思就是未明确的

    x 调用,两个x 都匹配(就象在同时import java.util 和java.sql 两个包时直接声明Date 一样)。

    对于父类的变量,可以用super.x 来明确,而接口的属性默认隐含为 public static final.所以可

    以通过A.x 来明确。

  • 第4题:

    下列程序通过实现Runnable接口创建一个线程,选择正确的语句填入程序的横线处。 class MyRun implements Runnable { String str; MyRun(String s) { str = s; } public void run() System.out.println(str); } } public class ex40 { public static void main(String[] args) { String name = "实现阶段Runnable 接口"; MyRun my = new MyRun(name); Thread th = th. start ( ); } }

    A.new MyRun(my)

    B.new Thread()

    C.new Thread(my)

    D.Thread(my)


    正确答案:C

  • 第5题:

    public class Foo implements Runnable (  public void run (Thread t) {  system.out.printIn(“Running.”);  }  public static void main (String[] args)  {  new thread (new Foo()).start();  } )   What is the result?()      

    • A、 An exception is thrown.
    • B、 The program exists without printing anything.
    • C、 An error at line 1 causes compilation to fail.
    • D、 An error at line 2 causes the compilation to fail.
    • E、 “Running” is printed and the program exits.

    正确答案:D

  • 第6题:

    下列代码正确的是哪项?() 

    • A、 public class Session implements Runnable, Clonable{   public void run ();public Object clone () ; }
    • B、 public class Session extends Runnable, Cloneable {  public void run() {/*dosomething*/}       public Object clone() {/*make a copy*/} }
    • C、 public abstract class Session implements Runnable, Clonable {       public void run() {/*do something*/}       public Object clone() {/*make a copy*/}        }
    • D、 public class Session implements Runnable, implements Clonable {       public void run() {/*do something*/}       public Object clone() {/*make a copy*/}       }

    正确答案:C

  • 第7题:

    现有:  interface Data {public void load();}  abstract class Info {public abstract void load();}      下列类定义中正确使用Data和Info的是哪项?() 

    • A、 public class Employee implements Info extends Data { public void load(){/*dosomething*/}     }
    • B、public class Employee extends Inf.implements Data{ public void load() {/*do something*/}     }
    • C、public class Empl.yee implements Inf extends Data{ public void Data.1oad(){* do something*/}     public void load(){/*do something*/}     }
    • D、public class Employee extends Inf implements Data  {  public void Data.1oad()  {/*do something*/)     public void info.1oad(){/*do something*/}    }

    正确答案:B

  • 第8题:

    public abstract class Shape {  private int x;  private int y;  public abstract void draw();  public void setAnchor(int x, int y) {  this.x = x;  this.y = y;  }  }  Which two classes use the Shape class correctly?()

    • A、 public class Circle implements Shape { private int radius; }
    • B、 public abstract class Circle extends Shape { private int radius; }
    • C、 public class Circle extends Shape { private int radius; public void draw(); }
    • D、 public abstract class Circle implements Shape { private int radius; public void draw(); }
    • E、 public class Circle extends Shape { private int radius;public void draw() {/* code here */} }
    • F、 public abstract class Circle implements Shape { private int radius;public void draw() { / code here */ } }

    正确答案:B,E

  • 第9题:

    单选题
    下列代码正确的是哪项?()
    A

     public class Session implements Runnable, Clonable{   public void run ();public Object clone () ; }

    B

     public class Session extends Runnable, Cloneable {  public void run() {/*dosomething*/}       public Object clone() {/*make a copy*/} }

    C

     public abstract class Session implements Runnable, Clonable {       public void run() {/*do something*/}       public Object clone() {/*make a copy*/}        }

    D

     public class Session implements Runnable, implements Clonable {       public void run() {/*do something*/}       public Object clone() {/*make a copy*/}       }


    正确答案: A
    解析: 暂无解析

  • 第10题:

    单选题
    interface Data { public void load(); }  abstract class Info { public abstract void load(); }  Which class correctly uses the Data interface and Info class?()
    A

     public class Employee extends Info implements Data { public void load() { /*do something*/ } }

    B

     public class Employee implements Info extends Data { public void load() { /*do something*/ } }

    C

     public class Employee extends Info implements Data { public void load() { /*do something */ } public void Info.load() { /*do something*/ } }

    D

     public class Employee implements Info extends Data { public void Data.load() { /*dsomething */ } public void load() { /*do something */ } }

    E

     public class Employee implements Info extends Data { public void load() { /*do something */ } public void Info.load(){ /*do something*/ } }

    F

     public class Employee extends Info implements Data{ public void Data.load() { /*do something*/ } public void Info.load() { /*do something*/ } }


    正确答案: A
    解析: 暂无解析

  • 第11题:

    多选题
    public class Threads2 implements Runnable {  public void nun() {  System.out.println(”run.”);  throw new RuntimeException(”Problem”);  }  public static void main(String[] args) {  Thread t = new Thread(new Threads2());  t.start();  System.out.println(”End of method.”);  }  }  Which two can be results?()
    A

    java.lang.RuntimeException: Problem

    B

    run.    java.lang.RuntimeException: Problem

    C

    End of method.    java.lang.RuntimeException: Problem

    D

    End of method.      run.      java.lang.RuntimeException: Problem

    E

    run.    java.lang.RuntimeException: Problem     End of method.


    正确答案: A,E
    解析: 暂无解析

  • 第12题:

    单选题
    public class Foo implements Runnable (  public void run (Thread t) {   system.out.printIn(“Running.”);   }   public static void main (String args) {   new thread (new Foo()).start();   }   )   What is the result?()
    A

     An exception is thrown.

    B

     The program exists without printing anything.

    C

     An error at line 1 causes compilation to fail.

    D

     An error at line 6 causes the compilation to fail.

    E

     “Running” is printed and the program exits.


    正确答案: E
    解析: 暂无解析

  • 第13题:

    下列哪个方法可用于创建一个可运行的类? ( )

    A.public class X implements Runable {public void run(){...,.,}}

    B.public class X implements Thread {public void run(){......}}

    C.public class X implements Thread {public int run(){……}}

    D.public class X implements Runable {protected void run(){.....}}


    正确答案:A

  • 第14题:

    在下面程序的下画线处应填入的选项是 public class Test______{ public static void main(String args[]) { Test t=new Test(); Thread tt=new Thread(t); tt.start(); } public void run() { for(int i=0;i<5;i++) System.out.println("i="+i); } }

    A.implements Runnable

    B.extends Thread

    C.implements Thread

    D.extends Runnable


    正确答案:A
    解析:创建线程有两种方法:实现java.lang.Runnahle接口和继承Thread类并重写run()方法。从创建线程实例的语句Thread tt=new Thread(t);可以看出本程序将Test类的实例t作为参数传递给Thread类的构造方法,因此是通过实现Runnable接口创建线程。

  • 第15题:

    下列关于Test类的定义中,正确的是( )。

    A.class Test implements Runnable{ public void run{} Dublic void someMethod[]{} }

    B.class Test implements Runnable( puIblic void run; }

    C.class Test implements Runnable( Dublic void someMethod[]; }

    D.class Test implements Runnable( public void someMethod{} }


    正确答案:A
    A。【解析】java中实现多线程的方法之一就是实现Runnable接口中的run方法,把实现Runnable接口的子类对象传递给Thread类的构造函数。

  • 第16题:

    ( 30 )在程序的下划线处应填入的选项是

    public class Test _________{

    public static void main(String args[]){

    Test t = new Test();

    Thread tt = new Thread(t);

    tt.start();

    }

    public void run(){

    for(int i=0;i<5;i++){

    system.out.println( " i= " +i);

    }

    }

    }

    A ) implements Runnable

    B ) extends Thread

    C ) implements Thread

    D ) extends Runnable


    正确答案:A

  • 第17题:

    interface Data { public void load(); }  abstract class Info { public abstract void load(); }  Which class correctly uses the Data interface and Info class?() 

    • A、 public class Employee extends Info implements Data { public void load() { /*do something*/ } }
    • B、 public class Employee implements Info extends Data { public void load() { /*do something*/ } }
    • C、 public class Employee extends Info implements Data { public void load() { /*do something */ } public void Info.load() { /*do something*/ } }
    • D、 public class Employee implements Info extends Data { public void Data.load() { /*dsomething */ } public void load() { /*do something */ } }
    • E、 public class Employee implements Info extends Data { public void load() { /*do something */ } public void Info.load(){ /*do something*/ } }
    • F、 public class Employee extends Info implements Data{ public void Data.load() { /*do something*/ } public void Info.load() { /*do something*/ } }

    正确答案:A

  • 第18题:

    Which method must be defined by a class implementing the java.lang.Runnable interface? () 

    • A、 void run()
    • B、 public void run()
    • C、 public void start()
    • D、 void run(int priority)
    • E、 public void run(int priority)
    • F、 public void start(int priority)

    正确答案:B

  • 第19题:

    interface A { public int getValue() }  class B implements A {  public int getValue() { return 1; }  }  class C extends B {  // insert code here  }  Which three code fragments, inserted individually at line 15, make use of polymorphism?()

    • A、 public void add(C c) { c.getValue(); }
    • B、 public void add(B b) { b.getValue(); }
    • C、 public void add(A a) { a.getValue(); }
    • D、 public void add(A a, B b) { a.getValue(); }
    • E、 public void add(C c1, C c2) { c1.getValue(); }

    正确答案:B,C,D

  • 第20题:

    单选题
    Which method must be defined by a class implementing the java.lang.Runnable interface? ()
    A

     void run()

    B

     public void run()

    C

     public void start()

    D

     void run(int priority)

    E

     public void run(int priority)

    F

     public void start(int priority)


    正确答案: E
    解析: 暂无解析

  • 第21题:

    单选题
    现有:  interface Data {public void load();}  abstract class Info {public abstract void load();}      下列类定义中正确使用Data和Info的是哪项?()
    A

     public class Employee implements Info extends Data { public void load(){/*dosomething*/}     }

    B

    public class Employee extends Inf.implements Data{ public void load() {/*do something*/}     }

    C

    public class Empl.yee implements Inf extends Data{ public void Data.1oad(){* do something*/}     public void load(){/*do something*/}     }

    D

    public class Employee extends Inf implements Data  {  public void Data.1oad()  {/*do something*/)     public void info.1oad(){/*do something*/}    }


    正确答案: D
    解析: 暂无解析

  • 第22题:

    多选题
    public abstract class Shape {  private int x;  private int y;  public abstract void draw();  public void setAnchor(int x, int y) {  this.x = x;  this.y = y;  }  }  Which two classes use the Shape class correctly?()
    A

    public class Circle implements Shape { private int radius; }

    B

    public abstract class Circle extends Shape { private int radius; }

    C

    public class Circle extends Shape { private int radius; public void draw(); }

    D

    public abstract class Circle implements Shape { private int radius; public void draw(); }

    E

    public class Circle extends Shape { private int radius;public void draw() {/* code here */} }

    F

    public abstract class Circle implements Shape { private int radius;public void draw() { / code here */ } }


    正确答案: B,E
    解析: 暂无解析

  • 第23题:

    单选题
    现有:  1. interface Animal {  2. void eat();  3. }  4.  5. // insert code here  6.  7. public class HouseCat extends Feline {  8. public void eat() { }  9. }   和五个声明:  abstract class Feline implements Animal { }  abstract class Feline implements Animal { void eat(); }  abstract class Feline implements Animal { public void eat(); }  abstract class Feline implements Animal { public void eat() { } }  abstract class Feline implements Animal { abstract public void eat(); }  分别插入到第5行,有几个可以通过编译?()
    A

    0

    B

    1

    C

    2

    D

    3


    正确答案: D
    解析: 暂无解析

  • 第24题:

    单选题
    现有:  interface Animal {       void eat () ;       }       //insert code here       public class HouseCat extends Feline {       public void eat() { }       }  和五个申明  abstract class Feline implements Animal { }  abstract  class  Feline  implements  Animal  {  void eat () ;  }  abstract class Feline implements Animal { public void eat();}  abstract class Feline implements Animal { public void eat() {}  }  abstract class Feline implements Animal { abstract public void eat();} 结果为:()
    A

    1

    B

    2

    C

    3

    D

    4


    正确答案: C
    解析: 暂无解析