Here you can find the source of getFormatter()
public static DecimalFormat getFormatter()
//package com.java2s; /**/*from www .j a v a 2 s.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. */ import java.text.DecimalFormat; public class Main { /** * String utility to convert a number-of-bytes to human readable format. */ private static ThreadLocal<DecimalFormat> FORMATTER = new ThreadLocal<DecimalFormat>() { @Override protected DecimalFormat initialValue() { return new DecimalFormat("0.0"); } }; public static DecimalFormat getFormatter() { return FORMATTER.get(); } }