Using regular expression

package Test;

import java.io.*;

public class StringContains {

    private static String input;

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

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        while ( !(input = br.readLine()).isEmpty() ) {
            System.out.println("Alpha only = " + input.replaceAll("\\d", "").replaceAll("\\W", "").replaceAll("\\s", ""));
            System.out.println("Numberic only = " + input.replaceAll("\\D", ""));
            System.out.println("Symbols only = " + input.replaceAll("\\w", ""));
        }
    }
}