Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * 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.io.EOFException;
import java.io.IOException;
import java.io.InputStream;

public class Main {
    /**
     * Reads a "float" value from a byte array at a given offset. The value is
     * converted to the opposed endian system while reading.
     * @param data source byte array
     * @param offset starting offset in the byte array
     * @return the value read
     */
    public static float readSwappedFloat(byte[] data, int offset) {
        return Float.intBitsToFloat(readSwappedInteger(data, offset));
    }

    /**
     * Reads a "float" value from an InputStream. The value is
     * converted to the opposed endian system while reading.
     * @param input source InputStream
     * @return the value just read
     * @throws IOException in case of an I/O problem
     */
    public static float readSwappedFloat(InputStream input) throws IOException {
        return Float.intBitsToFloat(readSwappedInteger(input));
    }

    /**
     * Reads a "int" value from a byte array at a given offset. The value is
     * converted to the opposed endian system while reading.
     * @param data source byte array
     * @param offset starting offset in the byte array
     * @return the value read
     */
    public static int readSwappedInteger(byte[] data, int offset) {
        return (((data[offset + 0] & 0xff) << 0) + ((data[offset + 1] & 0xff) << 8)
                + ((data[offset + 2] & 0xff) << 16) + ((data[offset + 3] & 0xff) << 24));
    }

    /**
     * Reads a "int" value from an InputStream. The value is
     * converted to the opposed endian system while reading.
     * @param input source InputStream
     * @return the value just read
     * @throws IOException in case of an I/O problem
     */
    public static int readSwappedInteger(InputStream input) throws IOException {
        int value1 = read(input);
        int value2 = read(input);
        int value3 = read(input);
        int value4 = read(input);

        return ((value1 & 0xff) << 0) + ((value2 & 0xff) << 8) + ((value3 & 0xff) << 16) + ((value4 & 0xff) << 24);
    }

    /**
     * Reads the next byte from the input stream.
     * @param input  the stream
     * @return the byte
     * @throws IOException if the end of file is reached
     */
    private static int read(InputStream input) throws IOException {
        int value = input.read();

        if (-1 == value) {
            throw new EOFException("Unexpected EOF reached");
        }

        return value;
    }
}