Here you can find the source of getUnsignedByte(ByteBuffer bb)
public static int getUnsignedByte(ByteBuffer bb) throws IOException
//package com.java2s; /*/*from w w w .j a v a2 s . c om*/ This file is part of jpcsp. Jpcsp is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. Jpcsp is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Jpcsp. If not, see <http://www.gnu.org/licenses/>. */ import java.io.IOException; import java.nio.ByteBuffer; public class Main { public static int getUnsignedByte(ByteBuffer bb) throws IOException { return bb.get() & 0xFF; } }