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1题:
若有以下程序: #include <iostream> using namespace std; class A { private: int a; public: void seta(int x) { a=x; } void showa() { cout<<a<<","; } }; class B { private: int b; public: void setb (int x) { b=x; } void showb() { cout<<b<<","; } }; class C :public A,private B { private: int c; public: void setc(int x, inc y, int z) { c=z; seta (x); setb (y); } void showc() { showa (); showb (); cout<<c<<end1; } }; int main () { C c; c. setc(1,2,3); c.showc(); return 0; } 程序执行后的输出结果是
A.1,2,3
B.1,1,1
C.2,2,2
D.3,3,3
第2题:
若有以下程序: #include <iostream> using namespace std; class point { private: int x, y; public: point ( ) { x=0; y=0; } void setpoint(int x1,int y1) { x=x1; y=y1;
A.12,12
B.5,5
C.12,5
D.5,12
第3题:
第4题:
public abstract class Shape { int x; int y; public abstract void draw(); public void setAnchor(int x, int y) { this.x = x; this.y = y; } } and a class Circle that extends and fully implements the Shape class. Which is correct?()
第5题:
public class SyncTest ( private int x; private int y; private synchronized void setX (int i) (x=1;) private synchronized void setY (int i) (y=1;) public void setXY(int 1)(set X(i); setY(i);) public synchronized Boolean check() (return x !=y;) ) Under which conditions will check () return true when called from a different class?
第6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7题:
public class ConstOver { public ConstOver (int x, int y, int z) { } } Which two overload the ConstOver constructor?()
第8题:
public class MethodOver { private int x, y; private float z; public void setVar(int a, int b, float c){ x = a; y = b; z = c; } } Which two overload the setVar method?()
第9题:
public class SyncTest { private int x; private int y; public synchronized void setX (int i) (x=1;) public synchronized void setY (int i) (y=1;) public synchronized void setXY(int 1)(set X(i); setY(i);) public synchronized Boolean check() (return x !=y;) } Under which conditions will check () return true when called from a different class?
第10题:
X
y
j
i
第11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12题:
void setVar (int a, int b, float c){ x = a; y = b; z = c; }
public void setVar(int a, float c, int b) { setVar(a, b, c); }
public void setVar(int a, float c, int b) { this(a, b, c); }
public void setVar(int a, float b){ x = a; z = b; }
public void setVar(int ax, int by, float cz) { x = ax; y = by; z = cz; }
第13题:
若有以下程序:#include <iostream>using namespace std;class A{private: int a;public: void seta(int x) { a=x; } void showa() { cout<<a<<","; }};class B{private: int b;public: void setb(int x) { b=x; } void showb() { cout<<b<<","; }};class C: public A, private B{private: int c;public: void setc(int x, int y, int z) { c=z; seta(x); setb(y); } void showc() { showa(); showb(); cout<<c<<end1; }};int main(){ C c; c.setc(1,2,3); c.showc(); return 0;}程序执行后的输出结果是( )。
A.1,2,3
B.1,1,1
C.2,2,2
D.3,3,3
第14题:
第15题:
第16题:
Which three demonstrate an “is a” relationship?()
第17题:
现有: public class TestDemo{ private int X-2; static int y=3; public void method(){ final int i=100; int j =10; class Cinner { public void mymethod(){ //Here } } } } 在Here处可以访问的变量是哪些?()
第18题:
public class TestDemo{ private int x = 2; static int y = 3; public void method(){ final int i=100; int j = 10; class Cinner{ public void mymethod(){ //Here } } } } 在Here处可以访问的变量是哪些?()
第19题:
Given: 1. public class ConstOver { 2. public constOver(int x, int y, int z) { 3. } 4. } Which two overload the ConstOver Constructor?()
第20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?()
第21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?()
第22题:
ConstOver ( ) { }
Protected int ConstOver ( ) { }
Private ConstOver (int z, int y, byte x) { }
Public Object ConstOver (int x, int y, int z) { }
Public void ConstOver (byte x, byte y, byte z) { }
第23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24题:
x
y
i
j