Here you can find the source of toHex(int value, int minNumOfDigits)
public static String toHex(int value, int minNumOfDigits)
//package com.java2s; /******************************************************************************* * Copyright 2014 United States Government as represented by the * Administrator of the National Aeronautics and Space Administration. * All Rights Reserved.//ww w .j a v a 2 s. co m * * 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. ******************************************************************************/ public class Main { public static String toHex(int value, int minNumOfDigits) { String hexString = Integer.toHexString(value); while (hexString.length() < minNumOfDigits) hexString = "0" + hexString; return "0x" + hexString.toUpperCase(); } }