Question

Design a class Toggle which toggles a word by converting all upper case alphabets to lower case and vice versa.

Example: The word “mOTivATe” becomes “MotIVatE”

The details of the members of the class are given below:

Class name	Toggle
Data members/instance variables:
str	stores a word
newstr	stores the toggled word
len	to store the length of the word
Methods/Member functions:
Toggle( )	default constructor
void readword( )	to accept the word
void toggle( )	converts the upper case alphabets to lower case and all lower case alphabets to upper case and stores it in newstr
void display( )	displays the original word along with the toggled word

Specify the class Toggle giving details of the constructor, void readword( ), void toggle( ) and void display( ). Define the main( ) function to create an object and call the functions accordingly to enable the task.

Answer 1

import java.util.Scanner;
class Toggle
{
String str, newstr;
int len;
public Toggle()
{
str=newstr=" ";
len=0;
}
public void readword( )
{
Scanner sc=new Scanner(System.in);
System.out.println("Enter a word");
str=sc.next();
len=str.length();
}
public void toggle( )
{
for(int i=0; i<len;i++)
{
char c=str.charAt(i);
if(Character.isUpperCase(c))
newstr+=Character.toLowerCase(c);
else
newstr+=Character.toUppercase(c);
}
}
public void display( )
{
System.out.println("Original string:" +str);
System.out.println("New string:" +news tr);
}
public static void main(String ar[ ])
{
Toggle Ob=new Toggle();
Ob.readword( );
Ob.toggle();
Ob.display( );
}
}