Here you can find the source of toString(InputStream is)
public static String toString(InputStream is) throws IOException
//package com.java2s; /**//from ww w . j av a 2 s .c o m * Copyright (C) 2012 ToolkitForAndroid Project * * 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.IOException; import java.io.InputStream; public class Main { public static String toString(InputStream is) throws IOException { if (null == is) return null; return toStringBuffer(is).toString(); } public static StringBuffer toStringBuffer(InputStream is) throws IOException { if (null == is) return null; StringBuffer buffer = new StringBuffer(); byte[] cache = new byte[1 * 1024]; for (int len; (len = is.read(cache)) != -1;) { buffer.append(new String(cache, 0, len)); } is.close(); return buffer; } }