Java InputStream Read Long readLong(InputStream in)

Description

Read a long (8 bytes).

License

Apache License

Parameter

Parameter	Description
in	the input stream

Exception

Parameter	Description
IOException	if an IO exception occurred while reading.

Return

the value

Declaration

public static long readLong(InputStream in) throws IOException 

Method Source Code

//package com.java2s;
/*/* ww  w.  ja  v  a  2  s .  c  om*/
 * 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.IOException;
import java.io.InputStream;

public class Main {
    /**
     * Read a long (8 bytes).
     *
     * @param in the input stream
     * @return the value
     * @throws IOException if an IO exception occurred while reading.
     */
    public static long readLong(InputStream in) throws IOException {
        return ((long) (readInt(in)) << 32) + (readInt(in) & 0xffffffffL);
    }

    /**
     * Read an integer (4 bytes).
     *
     * @param in the input stream
     * @return the value
     * @throws IOException if an IO exception occurred while reading.
     */
    public static int readInt(InputStream in) throws IOException {
        return ((in.read() & 0xff) << 24) + ((in.read() & 0xff) << 16) + ((in.read() & 0xff) << 8)
                + (in.read() & 0xff);
    }
}

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