Here you can find the source of int2binString(int x)
public static String int2binString(int x)
//package com.java2s; /*// ww w. ja va2s . c o m * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you 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 final String[] hex_digit = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f" }; public static String int2binString(int x) { String s = ""; for (int ii = 0; ii < 32; ii++) { if ((ii > 0) && (ii % 4 == 0)) { s = " " + s; } s = hex_digit[(x & (1 << ii)) >>> ii] + s; } return s; } }