Here you can find the source of generatePassword()
public static String generatePassword()
//package com.java2s; /*//from w w w . ja v a 2 s .c o m * Copyright 1998-2012 Linux.org.ru * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import java.util.Random; public class Main { private static final Random random = new Random(); public static String generatePassword() { StringBuilder builder = new StringBuilder(); for (int i = 0; i < 10; i++) { int r = Math.abs(random.nextInt()); builder.append((char) (33 + r % (126 - 33))); } return builder.toString(); } }