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Database System Concepts
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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Q2: Consider the following statements: public class XClas { private int a; private int b; public void one() } public void two(int x, int y { } public XClass() { } } class XClass extends YClass { private int z; public void one() { } public XClass() { } KClass xQbisct: XClass FQkisct: Write the definition of the default constructor of XClass so that the instance variables of XClas are initialized to 0. Write the definition of the default constructor of XClass so that the instance variables of XClass are initialized to 0. Write the definition of the method two of YClass so that the instance variable a is initialized to the value of the first parameter of two and the instance variable b is initialized to the value of the second parameter of two.
Transcribed Image Text:Q2: Consider the following statements: public class XClas { private int a; private int b; public void one() } public void two(int x, int y { } public XClass() { } } class XClass extends YClass { private int z; public void one() { } public XClass() { } KClass xQbisct: XClass FQkisct: Write the definition of the default constructor of XClass so that the instance variables of XClas are initialized to 0. Write the definition of the default constructor of XClass so that the instance variables of XClass are initialized to 0. Write the definition of the method two of YClass so that the instance variable a is initialized to the value of the first parameter of two and the instance variable b is initialized to the value of the second parameter of two.
Q1: Consider the following class definition: public class AClass { private int u; private int v; public void print() { public void set(int x, int y) { public AClass() { public AClass(int x, int y) { } } What is wrong with the following class definition? class BClass AClasA { private int w; public void print() { Svstem.cut printla("u + v+ w = "+ (u + v + w); } public BClass() { super = 0; w = } public BClass(int x, int y, int z) { super(x, y w = z; } }
Transcribed Image Text:Q1: Consider the following class definition: public class AClass { private int u; private int v; public void print() { public void set(int x, int y) { public AClass() { public AClass(int x, int y) { } } What is wrong with the following class definition? class BClass AClasA { private int w; public void print() { Svstem.cut printla("u + v+ w = "+ (u + v + w); } public BClass() { super = 0; w = } public BClass(int x, int y, int z) { super(x, y w = z; } }
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