Java File Read via ByteBuffer readBytes(InputStream is)

Description

read Bytes

License

Open Source License

Declaration

public static int readBytes(InputStream is) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.io.InputStream;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;

public class Main {
    private static final Integer SANITY_CHECK_MAX_INT = 100000;

    public static int readBytes(InputStream is) {
        try {//from w  ww.  j  a  va 2  s  .c  om
            byte[] data = new byte[4];
            is.read(data);
            int result = byteArrayToInt(data);
            if (result > SANITY_CHECK_MAX_INT) {
                throw new RuntimeException("Too large number");
            }
            return result;
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    public static int byteArrayToInt(byte[] bytes) {
        if (bytes.length != 4) {
            throw new RuntimeException("Not integer");
        }
        return ByteBuffer.wrap(bytes).order(ByteOrder.LITTLE_ENDIAN).getInt();
    }
}

Related

1. readBinaryFileAsFloats(String fileName)
2. readByte(String filePath)
3. readBytes(File f)
4. readBytes(final InputStream in, final int length)
5. readBytes(final String file)
6. readBytes(Path file)
7. readBytes(ReadableByteChannel channel, byte[] array)
8. readBytes(String file)
9. readCode(byte[] message)