4. Given the following class definitions: public class SeaCreature { public void method1() {System.out.println("creature 1");}public void method2() {System.out.println("creature 2");}public String toString() {return "ocean-dwelling";} } public class Mammal extends SeaCreature {public void method1() { System.out.println("warm-blooded"); } } public class Whale extends Mammal {public void method1() {System.out.println("spout");}public String toString() {return "BIG!";} } public class BabyWhale extends Whale {public void method2() {System.out.println("smallspout");}public String toString() {return "Baby!";} } What output is produced by the following code segment without executing the code? SeaCreature[] elements = {new Whale(), new SeaCreature(), new Mammal(), new BabyWhale()}; for (int i = 0; i < elements.length; i++) {System.out.println(elements[i]);elements[i].method1();elements[i].method2();System.out.println(); }
4. Given the following class definitions: public class SeaCreature { public void method1() {System.out.println("creature 1");}public void method2() {System.out.println("creature 2");}public String toString() {return "ocean-dwelling";} } public class Mammal extends SeaCreature {public void method1() { System.out.println("warm-blooded"); } } public class Whale extends Mammal {public void method1() {System.out.println("spout");}public String toString() {return "BIG!";} } public class BabyWhale extends Whale {public void method2() {System.out.println("smallspout");}public String toString() {return "Baby!";} } What output is produced by the following code segment without executing the code? SeaCreature[] elements = {new Whale(), new SeaCreature(), new Mammal(), new BabyWhale()}; for (int i = 0; i < elements.length; i++) {System.out.println(elements[i]);elements[i].method1();elements[i].method2();System.out.println(); }
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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OOPs
In today's technology-driven world, computer programming skills are in high demand. The object-oriented programming (OOP) approach is very much useful while designing and maintaining software programs. Object-oriented programming (OOP) is a basic programming paradigm that almost every developer has used at some stage in their career.
Constructor
The easiest way to think of a constructor in object-oriented programming (OOP) languages is:
Question
4. Given the following class definitions:
public class SeaCreature {
public void method1() {
System.out.println("creature 1");
}
public void method2() {
System.out.println("creature 2");
}
public String toString() {
return "ocean-dwelling";
}
}
public class Mammal extends SeaCreature {
public void method1() {
System.out.println("warm-blooded");
}
}
public class Whale extends Mammal {
public void method1() {
System.out.println("spout");
}
public String toString() {
return "BIG!";
}
}
public class BabyWhale extends Whale {
public void method2() {
System.out.println("smallspout");
}
public String toString() {
return "Baby!";
}
}
What output is produced by the following code segment without executing the code?
SeaCreature[] elements = {new Whale(), new SeaCreature(), new Mammal(),
new BabyWhale()};
for (int i = 0; i < elements.length; i++) {
System.out.println(elements[i]);
elements[i].method1();
elements[i].method2();
System.out.println();
}
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