public class Thing { }
public class Thing { public Thing() {} }
public class Thing { public Thing(void) {} }
public class Thing { public Thing(String s) {} }
public class Thing { public void Thing() {} public Thing(String s) {} }
第1题:
To qualify for a promotion, ()to exceed the quota.
Athe best thing he could do was
Bhe did his best
Call he could do was
Dhis best thing was
第2题:
In which two cases does the compiler supply a default constructor for class A?()
第3题:
Which two allow the class Thing to be instantiated using new Thing()?
第4题:
public class X { public X aMethod() { return this;} } public class Y extends X { } Which two methods can be added to the definition of class Y?()
第5题:
public class Plant { private String name; public Plant(String name) { this.name = name; } public String getName() { return name; } } public class Tree extends Plant { public void growFruit() { } public void dropLeaves() { } } Which is true?()
第6题:
int addValue( int a, int b ){// do something...}
public void addValue (){// do something...}
public int addValue( int a ){// do something...}
public int addValue( int a, int b )throws MyException {//do something...}
第7题:
public void aMethod() {}
private void aMethod() {}
public void aMethod(String s) {}
private Y aMethod() { return null; }
public X aMethod() { return new Y(); }
第8题:
One object is created
Two objects are created
Three objects are created
One reference variable is created
Two reference variables are created
Three reference variables are created.
第9题:
public void foo() { }
public int foo() { return 3; }
public Two foo() { return this; }
public One foo() { return this; }
public Object foo() { return this; }
第10题:
public class X { } public class Y extends X { }
public interface Shape { } public interface Rectangle extends Shape{ }
public interface Color { } public class Shape { private Color color; }
public interface Species { } public class Animal { private Species species; }
public class Person { } public class Employee { public Employee(Person person) { }
interface Component { } class Container implements Component { private Component[] children; }
第11题:
public class Circle implements Shape { private int radius; }
public abstract class Circle extends Shape { private int radius; }
public class Circle extends Shape { private int radius; public void draw(); }
public abstract class Circle implements Shape { private int radius; public void draw(); }
public class Circle extends Shape { private int radius;public void draw() {/* code here */} }
public abstract class Circle implements Shape { private int radius;public void draw() { / code here */ } }
第12题:
A Bar is a Baz.
A Foo has a Bar.
A Baz is a Foo.
A Foo is a Baz.
A Baz has a Bar.
第13题:
public class SomeException { } Class a: public class a { public void doSomething() { } } Class b: public class b extends a { public void doSomething() throws SomeException { } } Which is true about the two classes?()
第14题:
1. public interface A { 2. public void doSomething(String thing); 3. } 1. public class AImpl implements A { 2. public void doSomething(String msg) { } 3. } 1. public class B { 2. public A doit() { 3. // more code here 4. } 5. 6. public String execute() { 7. // more code here 8. } 9. } 1. public class C extends B { 2. public AImpl doit() { 3. // more code here 4. } 5. 6. public Object execute() { 7. // more code here 8. } 9. } Which statement is true about the classes and interfaces in the exhibit?()
第15题:
Given that Thing is a class, how many objects and reference variables are created by the following code?() Thing item, stuff; item = new Thing(); Thing entity = new Thing();
第16题:
Which statements concerning the relationships between the following classes are true?() class Foo { int num; Baz comp = new Baz(); } class Bar { boolean flag; } class Baz extends Foo { Bar thing = new Bar(); double limit; }
第17题:
public interface Person { } public class Employee extends Person { }
public interface Shape { } public class Employee extends Shape { }
public interface Color { } public class Employee extends Color { }
public class Species { } public class Animal (private Species species;)
interface Component { } Class Container implements Component ( Private Component[ ] children; )
第18题:
public void main(String args[])
public void static main(String args[])
public static main(String[] argv)
final public static void main(String [] array)
public static void main(String args[])
第19题:
public interface Person {} Public class Employee extends Person {}
public interface Shape {} public interface Rectangle extends Shape {}
public interface Color {} public class Shape { private Color color; }
public class Species {} public class Animal { private Species species; }
interface Component {} Class Container implements Component {private Component [] children;
第20题:
No such a thing as
No such thing as
No such thing as a
No such a thing as a
第21题:
Compilation of both classes will fail.
Compilation of both classes will succeed.
Compilation of class a will fail. Compilation of class b will succeed.
Compilation of class a will fail. Compilation of class a will succeed.
第22题:
public int hashCode()
public boolean equals(Key k)
public int compareTo(Object o)
public boolean equals(Object o)
public boolean compareTo(Key k)
第23题:
public class Employee implements Info extends Data { public void load(){/*dosomething*/} }
public class Employee extends Inf.implements Data{ public void load() {/*do something*/} }
public class Empl.yee implements Inf extends Data{ public void Data.1oad(){* do something*/} public void load(){/*do something*/} }
public class Employee extends Inf implements Data { public void Data.1oad() {/*do something*/) public void info.1oad(){/*do something*/} }