Here you can find the source of percentFormat(float value)
public static String percentFormat(float value)
//package com.java2s; /**//from w ww .j av a 2 s . com * 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. */ import java.text.DecimalFormat; public class Main { static final DecimalFormat PERCENT_FORMAT = new DecimalFormat("###.#"); public static String percentFormat(float value) { return PERCENT_FORMAT.format(value * 100.0f); } }