Consider public class MyClass { public MyClass(){/code/} // more code… } To instantiate MyClass, you would write? MyClass mc = new MyClass(); MyClass mc = MyClass; MyClass mc = MyClass(); MyClass mc = new MyClass; public static int foo(int a, String s) { s = “Yellow”; a=a+2; return a; } public static void bar() { int a=2; String s = “Blue”; a = foo(a,s); System.out.println(“a=”+a+” s=”+s); } public static void main(String args[]) { bar(); } What is printed on execution of these methods? a = 4 s = Blue a = 5 s = Yellow a = 3 s = Yellow a =2 5 s = Blue What is true about private fields of a class? They must be used with private methods. They are accessible from anywhere inside or outside of a class. They can never be used in a class. They can be accessed only by methods inside the class they are associated with.
Consider public class MyClass { public MyClass(){/code/} // more code… } To instantiate MyClass, you would write? MyClass mc = new MyClass(); MyClass mc = MyClass; MyClass mc = MyClass(); MyClass mc = new MyClass; public static int foo(int a, String s) { s = “Yellow”; a=a+2; return a; } public static void bar() { int a=2; String s = “Blue”; a = foo(a,s); System.out.println(“a=”+a+” s=”+s); } public static void main(String args[]) { bar(); } What is printed on execution of these methods? a = 4 s = Blue a = 5 s = Yellow a = 3 s = Yellow a =2 5 s = Blue What is true about private fields of a class? They must be used with private methods. They are accessible from anywhere inside or outside of a class. They can never be used in a class. They can be accessed only by methods inside the class they are associated with.
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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Concept explainers
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
Consider
public class MyClass
{
public MyClass(){/code/}
// more code…
}
To instantiate MyClass, you would write?
MyClass mc = new MyClass();
MyClass mc = MyClass;
MyClass mc = MyClass();
MyClass mc = new MyClass;
public static int foo(int a, String s)
{
s = “Yellow”;
a=a+2;
return a;
}
public static void bar()
{
int a=2;
String s = “Blue”;
a = foo(a,s);
System.out.println(“a=”+a+” s=”+s);
}
public static void main(String args[])
{
bar();
}
What is printed on execution of these methods?
a = 4 s = Blue
a = 5 s = Yellow
a = 3 s = Yellow
a =2 5 s = Blue
What is true about private fields of a class?
They must be used with private methods.
They are accessible from anywhere inside or outside of a class.
They can never be used in a class.
They can be accessed only by methods inside the class they are associated with.
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