多选题class BaseClass{  private float x= 1.0f;  protected void setVar (float f) {x = f;}  }  class SubClass extends BaseClass   {  private float x = 2.0f;  //insert code here  }   Which two are valid examples of method overriding?()AVoid setVar(float f) {x = f;}BPublic void setVar(int f) {x = f;}CPublic void setVar(float f) {x = f;}DPublic double setVar(float f) {x = f;}EPublic final void setVar(float f) {x = f;}FProtected float setVar() {x=3.0f; return 3.0f; }

多选题
class BaseClass{  private float x= 1.0f;  protected void setVar (float f) {x = f;}  }  class SubClass extends BaseClass   {  private float x = 2.0f;  //insert code here  }   Which two are valid examples of method overriding?()
A

Void setVar(float f) {x = f;}

B

Public void setVar(int f) {x = f;}

C

Public void setVar(float f) {x = f;}

D

Public double setVar(float f) {x = f;}

E

Public final void setVar(float f) {x = f;}

F

Protected float setVar() {x=3.0f; return 3.0f; }


参考解析

解析: 暂无解析

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类A定义如下: class A { private int x=10; int getx() { return x;} } class B extends A { private int x=15; //需要覆盖getx()方法 } 在下述方法中可以在类B中覆盖getx()方法的是 ( )A.int getx(){…}B.int getx(float f){…}C.float getx(){…}D.double getx(float f){…}

1. class BaseClass {  2. private float x = 1.of;  3. protected float getVar() { return x; }  4. }  5. class SubClass extends BaseClass {  6. private float x = 2.Of;  7. // insert code here 8. }   Which two are valid examples of method overriding when inserted at line 7?() A、 float getVar() { return x; }B、 public float getVar() { return x; }C、 public double getVar() { return x; }D、 protected float getVar() { return x; }E、 public float getVar(float f) { return f; }

class super {   public float getNum() {return 3.0f;}   }   public class Sub extends Super {   }   Which method, placed at line 6, will cause a compiler error?()A、 Public float getNum() {return 4.0f; }B、 Public void getNum (){}C、 Public void getNum (double d){}D、 Public double getNum (float d) {retrun 4.0f; }

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

1. abstract class AbstractIt {  2. abstract float getFloat();  3. }  4. public class AbstractTest extends AbstractIt {  5. private float f1 = 1.0f;  6. private float getFloat() { return f1; }  7. }  What is the result?() A、 Compilation succeeds.B、 An exception is thrown.C、 Compilation fails because of an error at line 2.D、 Compilation fails because of an error at line 6.

Given:  1. public class Method Over {  2. public void set Var (int a, int b, float c) {  3. }  4. }   Which two overload the set Var method()?A、 private void set Var(int a, float c, int b) {}B、 protected void set Var(int a, int b, float c) {}C、 public int set Var(int a, float c, int b) {return a:}D、 public int set Var(int a, int b, float c) {return a:}E、 protected float set Var(int a, int b, float c) {return c:}

abstract class abstrctIt {   abstract float getFloat ();   }   public class AbstractTest extends AbstractIt {   private float f1= 1.0f;   private float getFloat () {return f1;}   }   What is the result? ()A、 Compilation is successful.B、 An error on line 6 causes a runtime failure.C、 An error at line 6 causes compilation to fail.D、 An error at line 2 causes compilation to fail.

Which three are valid declarations of a float? () A、 Float foo = -1;B、 Float foo = 1.0;C、 Float foo = 42e1;D、 Float foo = 2.02f;E、 Float foo = 3.03d;F、 Float foo = 0x0123;

Which two cause a compiler error?() A、 float[] = new float(3);B、 float f2[] = new float[];C、 float[] f1 = new float[3];D、 float f3[] = new float[3];E、 float f5[] = { 1.0f, 2.0f, 2.0f };F、 float f4[] = new float[] { 1.0f. 2.0f. 3.0f};

class BaseClass{  private float x= 1.0f;  protected void setVar (float f) {x = f;}  }  class SubClass extends BaseClass   {  private float x = 2.0f;  //insert code here  }   Which two are valid examples of method overriding?()        A、 Void setVar(float f) {x = f;}B、 Public void setVar(int f) {x = f;}C、 Public void setVar(float f) {x = f;}D、 Public double setVar(float f) {x = f;}E、 Public final void setVar(float f) {x = f;}F、 Protected float setVar() {x=3.0f; return 3.0f; }

class BaseClass{   private float x= 1.0f;   protected void setVar (float f) {x = f;}   }   class SubClass exyends BaseClass {   private float x = 2.0f;   //insert code here  8. }   Which two are valid examples of method overriding?()A、 Void setVar(float f) {x = f;}B、 Public void setVar(int f) {x = f;}C、 Public void setVar(float f) {x = f;}D、 Public double setVar(float f) {x = f;}E、 Public final void setVar(float f) {x = f;}F、 Protected float setVar() {x=3.0f; return 3.0f; }

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?()A、 void setVar (int a, int b, float c){  x = a;  y = b;  z = c;  }B、 public void setVar(int a, float c, int b) {  setVar(a, b, c);  }C、 public void setVar(int a, float c, int b) {  this(a, b, c);  }D、 public void setVar(int a, float b){  x = a;  z = b;  }E、 public void setVar(int ax, int by, float cz) {  x = ax;  y = by;  z = cz;  }

1. class super {  2. public float getNum() {return 3.0f;}  3. }  4.    5. public class Sub extends Super { 6.   7. }   Which method, placed at line 6, will cause a compiler error?()  A、  Public float getNum()   {return 4.0f; }B、  Public void getNum ()  { }C、  Public void getNum (double d)   { }D、  Public double getNum (float d) {retrun 4.0f; }

public class MethodOver  {  public void setVar (int a, int b, float c)  {  }  }   Which two overload the setVar method?()  A、 Private void setVar (int a, float c, int b)  { }B、 Protected void setVar (int a, int b, float c) { }C、 Public int setVar (int a, float c, int b) (return a;)D、 Public int setVar (int a, int b, float c) (return a;)E、 Protected float setVar (int a, int b, float c) (return c;)

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 */ } }

Which three statements are true?()A、A final method in class X can be abstract if and only if X is abstract.B、A protected method in class X can be overridden by any subclass of X.C、A private static method can be called only within other static methods in class X.D、A non-static public final method in class X can be overridden in any subclass of X.E、A public static method in class X can be called by a subclass of X without explicitly referencing the class X.F、A method with the same signature as a private final method in class X can be implemented in a subclass of X.G、A protected method in class X can be overridden by a subclass of X only if the subclass is in the same package as X.

多选题public class MethodOver  {  public void setVar (int a, int b, float c)  {  }  }   Which two overload the setVar method?()APrivate void setVar (int a, float c, int b)  { }BProtected void setVar (int a, int b, float c) { }CPublic int setVar (int a, float c, int b) (return a;)DPublic int setVar (int a, int b, float c) (return a;)EProtected float setVar (int a, int b, float c) (return c;)

单选题abstract class abstrctIt {  abstract float getFloat ();  } public class AbstractTest extends AbstractIt { private float f1= 1.0f;  private float getFloat () {return f1;}  }   What is the result?()A Compilation is successful.B An error on line 6 causes a runtime failure.C An error at line 6 causes compilation to fail.D An error at line 2 causes compilation to fail.

多选题class BaseClass{  private float x= 1.0f;  protected void setVar (float f) {x = f;}  } class SubClass extends BaseClass   {  private float x = 2.0f;  //insert code here 16. }   Which two are valid examples of method overriding?()AVoid setVar(float f) {x = f;}BPublic void setVar(int f) {x = f;}CPublic void setVar(float f) {x = f;}DPublic double setVar(float f) {x = f;}EPublic final void setVar(float f) {x = f;}FProtected float setVar() {x=3.0f; return 3.0f; }

单选题1. abstract class AbstractIt {  2. abstract float getFloat();  3. }  4. public class AbstractTest extends AbstractIt {  5. private float f1 = 1.0f;  6. private float getFloat() { return f1; }  7. }  What is the result?()A Compilation succeeds.B An exception is thrown.C Compilation fails because of an error at line 2.D Compilation fails because of an error at line 6.

单选题class super {   public float getNum() {return 3.0f;}   }   public class Sub extends Super {   }   Which method, placed at line 6, will cause a compiler error?()A Public float getNum() {return 4.0f; }B Public void getNum (){}C Public void getNum (double d){}D Public double getNum (float d) {retrun 4.0f; }

多选题Which two cause a compiler error?()Afloat[] = new float(3);Bfloat f2[] = new float[];Cfloat[] f1 = new float[3];Dfloat f3[] = new float[3];Efloat f5[] = { 1.0f, 2.0f, 2.0f };Ffloat f4[] = new float[] { 1.0f. 2.0f. 3.0f};

多选题1. class BaseClass {  2. private float x = 1.of;  3. protected float getVar() { return x; }  4. }  5. class SubClass extends BaseClass {  6. private float x = 2.Of;  7. // insert code here 8. }   Which two are valid examples of method overriding when inserted at line 7?()Afloat getVar() { return x; }Bpublic float getVar() { return x; }Cpublic double getVar() { return x; }Dprotected float getVar() { return x; }Epublic float getVar(float f) { return f; }

多选题class BaseClass{   private float x= 1.0f;   protected void setVar (float f) {x = f;}   }   class SubClass exyends BaseClass {   private float x = 2.0f;   //insert code here  8. }   Which two are valid examples of method overriding?()AVoid setVar(float f) {x = f;}BPublic void setVar(int f) {x = f;}CPublic void setVar(float f) {x = f;}DPublic double setVar(float f) {x = f;}EPublic final void setVar(float f) {x = f;}FProtected float setVar() {x=3.0f; return 3.0f; }

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 */ } }

多选题Which three statements are true?()AA final method in class X can be abstract if and only if X is abstract.BA protected method in class X can be overridden by any subclass of X.CA private static method can be called only within other static methods in class X.DA non-static public final method in class X can be overridden in any subclass of X.EA public static method in class X can be called by a subclass of X without explicitly referencing the class X.FA method with the same signature as a private final method in class X can be implemented in a subclass of X.GA protected method in class X can be overridden by a subclass of X only if the subclass is in the same package as X.

多选题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?()Avoid setVar (int a, int b, float c){ x = a; y = b; z = c; }Bpublic void setVar(int a, float c, int b) { setVar(a, b, c); }Cpublic void setVar(int a, float c, int b) { this(a, b, c); }Dpublic void setVar(int a, float b){ x = a; z = b; }Epublic void setVar(int ax, int by, float cz) { x = ax; y = by; z = cz; }