java program to Alter the Case of the Alphabet given by user.(Brijesh -> bRIJESH).

import java.util.*;

class AlterCaseOfAlphabet
{
public static void main(String[] args)
{
Scanner sc=new Scanner(System.in);
String str=sc.nextLine();
char[] ch=str.toCharArray();
String s="";
StringBuilder sb=new StringBuilder();
for(int i=0;i<ch.length;i++)
{
if(ch[i]>='a' && ch[i]<='z')
{
s=String.valueOf(ch[i]);
s=s.toUpperCase();
}
else
{
s=String.valueOf(ch[i]);
s=s.toLowerCase();
}
sb.append(s);
}
System.out.println(sb.toString());
}
}