Here you can find the source of printBuffer(String msg, ByteBuffer buffer)
| Parameter | Description |
|---|---|
| msg | The message to use as the header for this display |
| buffer | The ByteBuffer containing the data. The contents from 0 to buffer.position() are printed out. Remember to set position! |
public static String printBuffer(String msg, ByteBuffer buffer)
//package com.java2s; /*//w w w.ja v a 2 s . co m * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. * * Copyright (c) 2008-2010 Oracle and/or its affiliates. All rights reserved. * * The contents of this file are subject to the terms of either the GNU * General Public License Version 2 only ("GPL") or the Common Development * and Distribution License("CDDL") (collectively, the "License"). You * may not use this file except in compliance with the License. You can * obtain a copy of the License at * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html * or packager/legal/LICENSE.txt. See the License for the specific * language governing permissions and limitations under the License. * * When distributing the software, include this License Header Notice in each * file and include the License file at packager/legal/LICENSE.txt. * * GPL Classpath Exception: * Oracle designates this particular file as subject to the "Classpath" * exception as provided by Oracle in the GPL Version 2 section of the License * file that accompanied this code. * * Modifications: * If applicable, add the following below the License Header, with the fields * enclosed by brackets [] replaced by your own identifying information: * "Portions Copyright [year] [name of copyright owner]" * * Contributor(s): * If you wish your version of this file to be governed by only the CDDL or * only the GPL Version 2, indicate your decision by adding "[Contributor] * elects to include this software in this distribution under the [CDDL or GPL * Version 2] license." If you don't indicate a single choice of license, a * recipient has the option to distribute your version of this file under * either the CDDL, the GPL Version 2 or to extend the choice of license to * its licensees as provided above. However, if you add GPL Version 2 code * and therefore, elected the GPL Version 2 license, then the option applies * only if the new code is made subject to such option by the copyright * holder. */ import java.nio.ByteBuffer; public class Main { /** * Print the contents of the buffer out to the PrintStream in * hex and ASCII. * * Note this was taken from the java corba sources. * * @param msg The message to use as the header for this display * @param buffer The ByteBuffer containing the data. The contents * from 0 to buffer.position() are printed out. Remember to set * position! */ public static String printBuffer(String msg, ByteBuffer buffer) { StringBuffer sbuf = new StringBuffer(); int length = buffer.position(); sbuf.append("--------------------------------------------------------\n\n"); sbuf.append(msg).append("\n"); sbuf.append("\n"); sbuf.append("Thread : ").append(Thread.currentThread().getName()).append("\n"); sbuf.append("Total length (ByteBuffer position) : ").append(length).append("\n"); sbuf.append("Byte Buffer capacity : ").append(buffer.capacity()).append("\n\n"); try { char[] charBuf = new char[16]; for (int i = 0; i < length; i += 16) { int j = 0; // For every 16 bytes, there is one line of output. First, // the hex output of the 16 bytes with each byte separated // by a space. while (j < 16 && (i + j) < length) { int k = buffer.get(i + j); if (k < 0) k = 256 + k; String hex = Integer.toHexString(k); if (hex.length() == 1) hex = "0" + hex; sbuf.append(hex).append(" "); j++; } // Add any extra spaces to align the // text column in case we didn't end // at 16 while (j < 16) { sbuf.append(" "); j++; } // Now output the ASCII equivalents. Non-ASCII // characters are shown as periods. int x = 0; while (x < 16 && x + i < length) { if (isPrintable((char) buffer.get(i + x))) charBuf[x] = (char) buffer.get(i + x); else charBuf[x] = '.'; x++; } sbuf.append(new String(charBuf, 0, x)).append("\n"); } } catch (Throwable t) { t.printStackTrace(); } sbuf.append("--------------------------------------------------------\n"); return sbuf.toString(); } public static boolean isPrintable(char c) { if (Character.isJavaIdentifierStart(c)) { // Letters and $ _ return true; } if (Character.isDigit(c)) { return true; } switch (Character.getType(c)) { case Character.MODIFIER_SYMBOL: return true; // ` ^ case Character.DASH_PUNCTUATION: return true; // - case Character.MATH_SYMBOL: return true; // = ~ + | < > case Character.OTHER_PUNCTUATION: return true; // !@#%&*;':",./? case Character.START_PUNCTUATION: return true; // ( [ { case Character.END_PUNCTUATION: return true; // ) ] } } return false; } }