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单选题
public class X implements Runnable(    private int x;   private int y;   public static void main(Stringargs)  X that = new X();   (new Thread(that)).start();  (new Thread(that)).start();  )  public void run() (  for (;;) (  x++;   y++;   System.out.printIn(“x=” + x + “, y = ” + y);   )   )   What is the result?()
A

 Errors at lines 7 and 8 cause compilation to fail.

B

 The program prints pairs of values for x and y that might not always be the same on the same line  (for example, “x=2, y=1”).

C

 The program prints pairs of values for x and y that are always the same on the same line (for example, “x=1, y=1”. In addition, each value appears twice (for example, “x=1, y=1” followed by  “x=1, y=1”).

D

 The program prints pairs of values for x and y that are always the same on the same line (for example, “x=1, y=1”. In addition, each value appears only for once (for example, “x=1, y=1”  followed by “x=2, y=2”).


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更多 “单选题public class X implements Runnable(    private int x;   private int y;   public static void main(Stringargs)  X that = new X();   (new Thread(that)).start();  (new Thread(that)).start();  )  public void run() (  for (;;) (  x++;   y++;   System.out.printIn(“x=” + x + “, y = ” + y);   )   )   What is the result?()A  Errors at lines 7 and 8 cause compilation to fail.B  The program prints pairs of values for x and y that might not always be the same on the same line  (for example, “x=2, y=1”).C  The program prints pairs of values for x and y that are always the same on the same line (for example, “x=1, y=1”. In addition, each value appears twice (for example, “x=1, y=1” followed by  “x=1, y=1”).D  The program prints pairs of values for x and y that are always the same on the same line (for example, “x=1, y=1”. In addition, each value appears only for once (for example, “x=1, y=1”  followed by “x=2, y=2”).” 相关考题
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考题 Which three demonstrate an “is a” relationship?() A、 public class X { }  public class Y extends X { }B、 public interface Shape { }  public interface Rectangle extends Shape{ }C、 public interface Color { }  public class Shape { private Color color; }D、 public interface Species { }  public class Animal { private Species species; }E、 public class Person { } public class Employee {  public Employee(Person person) { }F、 interface Component { }  class Container implements Component { private Component[] children; }

考题 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*/}       }

考题 public class ConstOver {  public ConstOver (int x, int y, int z)  {  }  }   Which two overload the ConstOver constructor?()   A、 ConstOver ( ) { }B、 Protected int ConstOver ( ) { }C、 Private ConstOver (int z, int y, byte x) { }D、 Public Object ConstOver (int x, int y, int z) { }E、 Public void ConstOver (byte x, byte y, byte z) { }

考题 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 */ } }

考题 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*/}       }

考题 多选题Which three demonstrate an “is a” relationship?()Apublic class X { }  public class Y extends X { }Bpublic interface Shape { }  public interface Rectangle extends Shape{ }Cpublic interface Color { }  public class Shape { private Color color; }Dpublic interface Species { }  public class Animal { private Species species; }Epublic class Person { } public class Employee {  public Employee(Person person) { }Finterface Component { }  class Container implements Component { private Component[] children; }

考题 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?()Apublic class Circle implements Shape { private int radius; }Bpublic abstract class Circle extends Shape { private int radius; }Cpublic class Circle extends Shape { private int radius; public void draw(); }Dpublic abstract class Circle implements Shape { private int radius; public void draw(); }Epublic class Circle extends Shape { private int radius;public void draw() {/* code here */} }Fpublic abstract class Circle implements Shape { private int radius;public void draw() { / code here */ } }

考题 单选题10. public class Foo implements java.io.Serializable {  11. private int x;  12. public int getX() { return x; }  12.publicFoo(int x){this.x=x; }  13. private void writeObject( ObjectOutputStream s)  14. throws IOException {  15. // insert code here  16. }  17. }  Which code fragment, inserted at line 15, will allow Foo objects to be correctly serialized and deserialized?()A  s.writeInt(x);B  s.serialize(x);C  s.writeObject(x);D  s.defaultWriteObject();