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单选题
Assuming that the serializeBanana() and the deserializeBanana() methods will correctly use Java serialization and given:  import java.io.*;  class Food implemertts Serializable {int good = 3;}  class Fruit externds Food {int juice = 5;}  public class Banana extends Fruit {  int yellow = 4;  public static void main(String [] args) {  Banana b = new Banana(); Banana b2 = new Banana();  b.serializeBanana(b); // assume correct serialization  b2 = b.deserializeBanana(); // assume correct  System.out.println(”restore “+b2.yellow+ b2.juice+b2.good);  }  // more Banana methods go here  }  What is the result?()
A

 restore 400

B

 restore 403

C

 restore 453

D

 Compilation fails.

E

 An exception is thrown at runtime.


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更多 “单选题Assuming that the serializeBanana() and the deserializeBanana() methods will correctly use Java serialization and given:  import java.io.*;  class Food implemertts Serializable {int good = 3;}  class Fruit externds Food {int juice = 5;}  public class Banana extends Fruit {  int yellow = 4;  public static void main(String [] args) {  Banana b = new Banana(); Banana b2 = new Banana();  b.serializeBanana(b); // assume correct serialization  b2 = b.deserializeBanana(); // assume correct  System.out.println(”restore “+b2.yellow+ b2.juice+b2.good);  }  // more Banana methods go here  }  What is the result?()A  restore 400B  restore 403C  restore 453D  Compilation fails.E  An exception is thrown at runtime.” 相关考题
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考题 单选题1. import java.io.*;  2. public class Foo implements Serializable {  3. public int x, y;  4. public Foo( int x, int y) { this.x = x; this.y = y; }  5.  6. private void writeObject( ObjectOutputStream s)  7. throws IOException {  8. s.writeInt(x); s.writeInt(y)  9. }  10.  11. private void readObject( ObjectInputStream s)  12. throws IOException, ClassNotFoundException {  13.  14. // insert code here  15.  16. }  17. }  Which code, inserted at line 14, will allow this class to correctly serialize and deserialize?()A  s.defaultReadObject();B  this = s.defaultReadObject();C  y = s.readInt(); x = s.readInt();D  x = s.readInt(); y = s.readInt();

考题 单选题Assuming that the serializeBanana() and the deserializeBanana() methods will correctly use Java serialization and given:  import java.io.*;  class Food implemertts Serializable {int good = 3;}  class Fruit externds Food {int juice = 5;}  public class Banana extends Fruit {  int yellow = 4;  public static void main(String [] args) {  Banana b = new Banana(); Banana b2 = new Banana();  b.serializeBanana(b); // assume correct serialization  b2 = b.deserializeBanana(); // assume correct  System.out.println(”restore “+b2.yellow+ b2.juice+b2.good);  }  // more Banana methods go here  }  What is the result?()A  restore 400B  restore 403C  restore 453D  Compilation fails.E  An exception is thrown at runtime.

考题 多选题class One {   public One foo() { return this; }  }  class Two extends One {  public One foo() { return this; }  }  class Three extends Two {   // insert method here  }  Which two methods, inserted individually, correctly complete the Three class?()Apublic void foo() { }Bpublic int foo() { return 3; }Cpublic Two foo() { return this; }Dpublic One foo() { return this; }Epublic Object foo() { return this; }

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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What produces a compiler error?()A  class A { public A(int x) {} }B  class A {} class B extends A { B() {} }C  class A { A() {} } class B { public B() {} }D  class Z { public Z(int) {} } class A extends Z {}

考题 单选题1. public class Target {  2. private int i = 0;  3. public int addOne() {  4. return ++i;  5. }  6. }  And:  1. public class Client {  2. public static void main(String[] args) {  3. System.out.println(new Target().addOne());  4. }  5. }  Which change can you make to Target without affecting Client?()A  Line 4 of class Target can be changed to return i++;B  Line 2 of class Target can be changed to private int i = 1;C  Line 3 of class Target can be changed to private int addOne() {D  Line 2 of class Target can be changed to private Integer i = 0;