Write code to generate random String
//package com.book2s; import java.util.Random; public class Main { public static void main(String[] argv) { int len = 42; System.out.println(randomString(len)); }//from ww w . j a v a2 s.c o m private static final String PWD_CHARS = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"; private static Random random = new Random(); public static String randomString(int len) { StringBuilder builder = new StringBuilder(len); for (int i = 0; i < len; i++) builder.append(PWD_CHARS.charAt(random.nextInt(PWD_CHARS .length()))); return builder.toString(); } }