Java tutorial
//package com.java2s; /* * Copyright (C) 2006 The Android Open Source Project * * 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 final int parseUnsignedIntAttribute(CharSequence charSeq) { String value = charSeq.toString(); long bits; int index = 0; int len = value.length(); int base = 10; if ('0' == value.charAt(index)) { // Quick check for zero by itself if (index == (len - 1)) return 0; char c = value.charAt(index + 1); if ('x' == c || 'X' == c) { // check for hex index += 2; base = 16; } else { // check for octal index++; base = 8; } } else if ('#' == value.charAt(index)) { index++; base = 16; } return (int) Long.parseLong(value.substring(index), base); } }