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.

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.

相关考题:

已知如下类定义: class Base { public Base (){ //... } public Base ( int m ){ //... } protected void fun( int n ){ //... } } public class Child extends Base{ // member methods } 如下哪句可以正确地加入子类中?() A.private void fun( int n ){ //...}B.void fun ( int n ){ //... }C.protected void fun ( int n ) { //... }D.public void fun ( int n ) { //... }

在如下源代码文件Test.java中, 哪个是正确的类定义?() A.public class test { public int x = 0; public test(int x) { this.x = x; } }B.public class Test{ public int x=0; public Test(int x) { this.x = x; } }C.public class Test extends T1, T2 { public int x = 0; public Test (int x) { this.x = x; } }D.public class

Given:Which code, inserted at line 15, allows the class Sprite to compile?() A.Foo { public int bar() { return 1; }B.new Foo { public int bar() { return 1; }C.new Foo() { public int bar() { return 1; }D.new class Foo { public int bar() { return 1; }

下列哪个选项的java源文件代码片段是不正确的?A.package testpackage; public class Test{ }B.import java. io. *; package testpaekage; public class Test { }C.import java.io.*; class Person { } public class Test { }D.import java.io.*; import java. awt.*; public class Test{ }

在下列源代码文件Test.java中,正确定义类的代码是( )。A.pblic class test { public int x=0; public test(int x) { this. x=x;} }B.public class Test { public int x=0; public Test(int x) { this. x=x;} }C.public class Test extends T1,T2{ public int x = 0; public Test(int x){ this. x = x; } }D.protected class Test extends T2{ public int x = 0; public Test(int x) { this. x = x; } }

下列代码的输出结果是( )。class parent{void printme(){System.out.println("parent");}}class child extends parent{void printme(){System. out.println("child");}void printall(){super, printme();this.printme();printme();}}public class test{public static void main(String args[]){child myc=new child();myc.printall();}}A.import java.awt.*;B.import java.applet.applet;C.import java.io.*;D.import java, awt.graphics;

下列哪个选项的java源文件程序段是不正确的? ( )A.package testpackage; public class Test{ }B.import java.io.*; package testpackage; public class Test{ }C.import java.i.*; class Person{} public class Test{ }D.import java.io.*; import java.awt.*; public class Test { }

有下列程序:includeusing namespace std;class TestClass{int a;public:TestClass(in 有下列程序: #include<iostream> using namespace std; class TestClass { int a; public: TestClass(int x)<a=x;} void show(){cout<<a;} }; class TestClass1:publicTestClass { int b; public: TestClaA.5B.1C.0D.2

在下列源代码文件Test.java中, ( )是正确的类定义。A.public class test{B.public class Test{ public int x=0;public int x=0; public test (intx) public Test (int x){ {this.x=x; this.x=x;} }} }C.public class Test extends T1,T2{D.protected class Test extends T2{ public int=0;public int x=0; public Test(int x){Public Test (int x){ this.x=x;this.x=x: }} }}

在下列源代码文件Test.java中,哪个选项是正确的类定义?A.public class test{ public int x=0; public test(int x ) { this.x=x; } }B.public class Test { public int x=0; public Test(int x ) { this.x=x; } }C.public class Test extends T1 T2 { public int x=0; public Test(int x){ this.x=x; } }D.protected class Test extends T2 { public int x=0; public Test(int x) { this.x=x; } }

Assuming that the serializeBanana2() and the deserializeBanana2() methods will correctly use Java serialization and given:  import java.io.*;  class Food {Food() { System.out.print(”1”); } }  class Fruit extends Food implements Serializable {  Fruit() { System.out.print(”2”); } }  public class Banana2 extends Fruit { int size = 42;  public static void main(String [] args) {  Banana2 b = new Banana2();  b.serializeBanana2(b); // assume correct serialization  b = b.deserializeBanana2(b); // assume correct  System.out.println(” restored “+ b.size + “ “); }  // more Banana2 methods  }  What is the result?() A、 Compilation fails.B、 1 restored 42C、 12 restored 42D、 121 restored 42E、 1212 restored 42F、 An exception is thrown at runtime.

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?()A、 public void foo() { }B、 public int foo() { return 3; }C、 public Two foo() { return this; }D、 public One foo() { return this; }E、 public Object foo() { return this; }

package geometry;  public class Hypotenuse {  public InnerTriangle it = new InnerTriangle();  class InnerTriangle {  public int base;  public int height;  }  }  Which is true about the class of an object that can reference the variable base? ()A、 It can be any class.B、 No class has access to base.C、 The class must belong to the geometry package.D、 The class must be a subclass of the class Hypotenuse.

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 {}

public class Parent {  public int addValue( int a, int b) {     int s;     s = a+b;     return s;     }     }  class Child extends Parent {  }  Which methods can be added into class Child?()   A、 int addValue( int a, int b ){// do something...}B、 public void addValue (){// do something...}C、 public int addValue( int a ){// do something...}D、 public int addValue( int a, int b )throws MyException {//do something...}

public class Parent {     int change() {…}     }  class Child extends Parent {     }  Which methods can be added into class Child?()    A、 public int change(){}B、 int chang(int i){}C、 private int change(){}D、 abstract int chang(){}

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();

public class Key {  private long id1;  private long 1d2;  // class Key methods  }  A programmer is developing a class Key, that will be used as a key in a standard java.util.HashMap. Which two methods should be overridden to assure that Key works correctly as a key?()A、 public int hashCode()B、 public boolean equals(Key k)C、 public int compareTo(Object o)D、 public boolean equals(Object o)E、 public boolean compareTo(Key k)

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 */ } }

Given:   10. class One {   11. void foo() { }   12. }   13. class Two extends One {   14. //insert method here   15. }   Which three methods, inserted individually at line 14, will correctly complete class Two?()A、 public void foo() { /* more code here */ }B、 private void foo() { /* more code here */ }C、 protected void foo() { /* more code here */ }D、 int foo() { /* more code here */ }  E、 void foo() { /* more code here */ }

多选题public class Parent {  public int addValue( int a, int b) {     int s;     s = a+b;     return s;     }     }  class Child extends Parent {  }  Which methods can be added into class Child?()Aint addValue( int a, int b ){// do something...}Bpublic void addValue (){// do something...}Cpublic int addValue( int a ){// do something...}Dpublic int addValue( int a, int b )throws MyException {//do something...}

多选题public class Parent {     int change() {…}     }  class Child extends Parent {     }  Which methods can be added into class Child?()Apublic int change(){}Bint chang(int i){}Cprivate int change(){}Dabstract int chang(){}

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.

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; }

多选题public class Key {  private long id1;  private long 1d2;  // class Key methods  }  A programmer is developing a class Key, that will be used as a key in a standard java.util.HashMap. Which two methods should be overridden to assure that Key works correctly as a key?()Apublic int hashCode()Bpublic boolean equals(Key k)Cpublic int compareTo(Object o)Dpublic boolean equals(Object o)Epublic boolean compareTo(Key k)

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 */ } }

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 {}