Can you complete this code please?

[Hanadi Al-Naimi]

Hi,

I wish that I find a solution for this problem..
I asked to write a code that replacing each 'a' character on a string with a '?' character..

So I wrote this code but I could'nt continue it

import java.io.*;
public class Example4 {

public static void main(String[] args)throws IOException
{

DataInputStream Br = new DataInputStream(System.in);
String Word= new String();

System.out.print("Enter any word please>>");
Word= Br.readLine().trim();

String NewWord = Replace(Word);
System.out.println("\n The word was: "+Word+"\n The word after: "+NewWord);


}
public static String Replace ( String W )
{
String New= new String();
for ( int i=0 ; i < W.length() ; i++ )
if ( W.charAt(i)== 'A' || W.charAt(i)== 'a' )
// System.out.print(W.charAt(i));
// New=New.concat("?");


return New;

}
}

[Joyce Lee]

Hi Hanadi,

Why not use String's replace() method?

String s1 = "abcdeaaa";
System.out.println(s1.replace("a", "?")); // output is ?bcde???

Alternatively, replace A or a with ? using regular expression.

String s1 = "abcAdeaAa";
System.out.println(s1.replaceAll("[aA]", "?")); // output is ?bc?de???      

Check out the String API for more details.

Joyce
[ April 11, 2005: Message edited by: Joyce Lee ]

[Anselm Paulinus]

Joyce Lee gave a perfect solution to your problem; but if you insist in doing it the complex way as you are currently doing then you going to define new as StringBuffer and change the line New=New.concat("?"); with StringBuffer append() method.