Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright (C) 2012 The Android Open Source 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.EOFException;

import java.io.IOException;
import java.io.InputStream;

import java.io.Reader;
import java.io.StringWriter;

public class Main {
    /**
     * Fills 'dst' with bytes from 'in', throwing EOFException if insufficient bytes are available.
     */
    public static void readFully(InputStream in, byte[] dst) throws IOException {
        readFully(in, dst, 0, dst.length);
    }

    /**
     * Reads exactly 'byteCount' bytes from 'in' (into 'dst' at offset 'offset'), and throws
     * EOFException if insufficient bytes are available.
     *
     * Used to implement {@link java.io.DataInputStream#readFully(byte[], int, int)}.
     */
    public static void readFully(InputStream in, byte[] dst, int offset, int byteCount) throws IOException {
        if (byteCount == 0) {
            return;
        }
        if (in == null) {
            throw new NullPointerException("in == null");
        }
        if (dst == null) {
            throw new NullPointerException("dst == null");
        }
        checkOffsetAndCount(dst.length, offset, byteCount);
        while (byteCount > 0) {
            int bytesRead = in.read(dst, offset, byteCount);
            if (bytesRead < 0) {
                throw new EOFException();
            }
            offset += bytesRead;
            byteCount -= bytesRead;
        }
    }

    /** Returns the remainder of 'reader' as a string, closing it when done. */
    public static String readFully(Reader reader) throws IOException {
        try {
            StringWriter writer = new StringWriter();
            char[] buffer = new char[1024];
            int count;
            while ((count = reader.read(buffer)) != -1) {
                writer.write(buffer, 0, count);
            }
            return writer.toString();
        } finally {
            reader.close();
        }
    }

    public static void checkOffsetAndCount(int arrayLength, int offset, int count) {
        if ((offset | count) < 0 || offset > arrayLength || arrayLength - offset < count) {
            throw new ArrayIndexOutOfBoundsException();
        }
    }
}