Here you can find the source of toHexString(int value, int minLength)
public static String toHexString(int value, int minLength)
//package com.java2s; /*//from w ww. java 2 s . c o m * Copyright 2010 Georgios Migdos <cyberpython@gmail.com>. * * 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. * under the License. */ public class Main { public static String toHexString(int value, int minLength) { StringBuilder sb = new StringBuilder(Integer.toHexString(value).toUpperCase()); while (sb.length() < minLength) { sb.insert(0, '0'); } return sb.toString(); } }