001// --------------------------------------------------------------------------------
002// Copyright 2002-2024 Echo Three, LLC
003//
004// Licensed under the Apache License, Version 2.0 (the "License");
005// you may not use this file except in compliance with the License.
006// You may obtain a copy of the License at
007//
008//     http://www.apache.org/licenses/LICENSE-2.0
009//
010// Unless required by applicable law or agreed to in writing, software
011// distributed under the License is distributed on an "AS IS" BASIS,
012// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013// See the License for the specific language governing permissions and
014// limitations under the License.
015// --------------------------------------------------------------------------------
016
017package com.echothree.util.server.string;
018
019import java.util.Formatter;
020
021public class PercentUtils {
022    
023    private PercentUtils() {
024        super();
025    }
026    
027    private static class PercentUtilsHolder {
028        static PercentUtils instance = new PercentUtils();
029    }
030    
031    public static PercentUtils getInstance() {
032        return PercentUtilsHolder.instance;
033    }
034    
035    public String formatFractionalPercent(Integer percent) {
036        String result = null;
037        
038        if(percent != null) {
039            int rawPercent = percent;
040            StringBuilder sbPercent = new StringBuilder().append(rawPercent / 1000).append('.');
041            
042            new Formatter(sbPercent).format("%03d%%", rawPercent % 1000);
043            
044            result = sbPercent.toString();
045        }
046        
047        return result;
048    }
049    
050}