Hi
Execute the program and check whether is this what you want...Please try to explain your question properly...


import java.util.Scanner;


public class ReplaceLetters
{
public static void main(String[] args)
{
Scanner input;

input = new java.util.Scanner(System.in);

String s,s1,s2;
String resultString;
int count = 0,len;


System.out.print( "Enter a string: " );
s = input.nextLine();
System.out.println("enter the letter to be replaced(which yiou want to change)");
s1=input.nextLine();
System.out.println("enter the letter to replace(your own)");
s2=input.nextLine();
resultString=s.replace(s1,s2);
System.out.println("------ new string -----"+resultString);
}
}
Thanks
pinky

Pinky,

Thank you very much that was great
but this will change all the occurance even if its part of another word
the run of this program must be like this

> Enter text to be changed : fat
> Enter text to change it with : xxxxxx
> Enter the original text line :
the fat boy and his father

output:
the xxxxxx boy and his father

while your program will output the following for the same inputs

>the xxxxxx boy and his xxxxxxher

thank you if you can help

Hassan