Consider the two pieces of codes below, and answer the following questions. Program A: class Star...

 

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Consider the two pieces of codes below, and answer the following questions. Program A: class Star { }; public class BlackHole extends Star { private String name; public BlackHole(int mm) { return; }; // X public static void main(String[] args) { BlackHole x = new BlackHole(); } } Program B: class Star { }; public class BlackHole extends Star { private String name; public int BlackHole(int mm ) { return 0; }; // Y public static void main(String[] args) { BlackHole x new BlackHole(); } } Hints: The name of the class methods could have the same name like the class. However, the will cause the confusion and is a very bad programming practice. So, never name your class methods like the way we name the ctor. Line Y is a ctor Program A has implicit (invisible) no-argument ctor Line X is a ctor Program A can compile and run Program B can compile and run Program B has implicit (invisible) no-argument ctor Naming the class methods.. Consider the two pieces of codes below, and answer the following questions. Program A: class Star { }; public class BlackHole extends Star { private String name; public BlackHole(int mm) { return; }; // X public static void main(String[] args) { BlackHole x = new BlackHole(); } } Program B: class Star { }; public class BlackHole extends Star { private String name; public int BlackHole(int mm ) { return 0; }; // Y public static void main(String[] args) { BlackHole x = new BlackHole(); } } Consider the codes below. Choose the correct statements below. class Star { } public class BlackHole extends Star { private String name; public int BlackHole(double mass) { return 0; }; // A } public static void main(String[] args) { BlackHole x = new BlackHole(); = x. BlackHole(10.0); int y } ctor must have no return statement The codes compile and run ctor must have no return type Any non-constructor methods cannot have the same name as the class. The ctor of class BlackHole is overloaded Line A is a ctor. Consider the following code snippet. Choose the statements that compile (i..e, the existence of the statements will not cause compilation failure.) class Star { double mass; } class RedGiant extends Star { RedGiant() { super(); } // A RedGiant(int mass) { super(mass); } // B RedGiant (double mass) { super(mass); return; } // C Star(double mass) { this.mass = mass; } double Star () { return 0.0;} Star () { } } public class Ctor { } 00 E U A D public static void main(String[] args) { RedGiant r = new RedGiant(); // D r.Star(); // E } Consider the two pieces of codes below, and answer the following questions. Program A: class Star { }; public class BlackHole extends Star { private String name; public BlackHole(int mm) { return; }; // X public static void main(String[] args) { BlackHole x = new BlackHole(); } } Program B: class Star { }; public class BlackHole extends Star { private String name; public int BlackHole(int mm ) { return 0; }; // Y public static void main(String[] args) { BlackHole x new BlackHole(); } } Hints: The name of the class methods could have the same name like the class. However, the will cause the confusion and is a very bad programming practice. So, never name your class methods like the way we name the ctor. Line Y is a ctor Program A has implicit (invisible) no-argument ctor Line X is a ctor Program A can compile and run Program B can compile and run Program B has implicit (invisible) no-argument ctor Naming the class methods.. Consider the two pieces of codes below, and answer the following questions. Program A: class Star { }; public class BlackHole extends Star { private String name; public BlackHole(int mm) { return; }; // X public static void main(String[] args) { BlackHole x = new BlackHole(); } } Program B: class Star { }; public class BlackHole extends Star { private String name; public int BlackHole(int mm ) { return 0; }; // Y public static void main(String[] args) { BlackHole x = new BlackHole(); } } Consider the codes below. Choose the correct statements below. class Star { } public class BlackHole extends Star { private String name; public int BlackHole(double mass) { return 0; }; // A } public static void main(String[] args) { BlackHole x = new BlackHole(); = x. BlackHole(10.0); int y } ctor must have no return statement The codes compile and run ctor must have no return type Any non-constructor methods cannot have the same name as the class. The ctor of class BlackHole is overloaded Line A is a ctor. Consider the following code snippet. Choose the statements that compile (i..e, the existence of the statements will not cause compilation failure.) class Star { double mass; } class RedGiant extends Star { RedGiant() { super(); } // A RedGiant(int mass) { super(mass); } // B RedGiant (double mass) { super(mass); return; } // C Star(double mass) { this.mass = mass; } double Star () { return 0.0;} Star () { } } public class Ctor { } 00 E U A D public static void main(String[] args) { RedGiant r = new RedGiant(); // D r.Star(); // E }

Answer rating: 100% (QA)

Detailed Explanation Answer 1 Both Program A and Program B are attempting to define a class BlackHole that extends another class Star However there are critical differences in their implementations pa... View the full answer