padding string

pad.java

package main;

/**
 * @author: bohao
 */
public class Pad
{
    public static String leftPad(String pass) {
        return String.format("%10s",pass).replace(' ', '0');
    }

    public static String rightPad(String pass) {
        return String.format("%-10s",pass).replace(' ', '0');
    }

    public static void main(String[] args) {
        System.out.println(leftPad("4008123"));
        System.out.println(rightPad("4008123"));
    }
}