Here you can find the source of readToBuffer(StringBuffer buffer, String filePath, Charset charset)
public static void readToBuffer(StringBuffer buffer, String filePath, Charset charset) throws IOException
//package com.java2s; /*// w ww. ja v a 2 s .c o m Copyright [2013-2014] eBay Software Foundation 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.io.BufferedReader; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.nio.charset.Charset; public class Main { public static void readToBuffer(StringBuffer buffer, String filePath, Charset charset) throws IOException { InputStream is = new FileInputStream(filePath); String line; BufferedReader reader = new BufferedReader(new InputStreamReader(is, charset)); line = reader.readLine(); while (line != null) { buffer.append(line); buffer.append("\n"); line = reader.readLine(); } reader.close(); is.close(); } }