Java tutorial
//package com.java2s; /* * Copyright (C) 2013 Peng fei Pan <sky@xiaopan.me> * * 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.text.DecimalFormat; public class Main { public static String percent(double value1, double value2, int decimalPointAfterLength, boolean replaceWithZero, boolean removePercent) { StringBuffer buffString = new StringBuffer(); buffString.append("#"); if (decimalPointAfterLength > 0) { buffString.append("."); } for (int w = 0; w < decimalPointAfterLength; w++) { buffString.append(replaceWithZero ? "0" : "#"); } buffString.append("%"); if (buffString.length() > 0) { String result = new DecimalFormat(buffString.toString()).format(value1 / value2); if (removePercent && result.length() > 0) { result = result.substring(0, result.length() - 1); } return result; } else { return null; } } }