Java example source code file (Printer.java)

This example Java source code file (Printer.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

printer, show_threadid, show_timestamp, string

The Printer.java Java example source code

/*
 * Copyright (c) 1998, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package com.sun.media.sound;

/**
 * Printer allows you to set up global debugging status and print
 * messages accordingly.
 *
 * @author David Rivas
 * @author Kara Kytle
 */
final class Printer {

    static final boolean err = false;
    static final boolean debug = false;
    static final boolean trace = false;
    static final boolean verbose = false;
    static final boolean release = false;

    static final boolean SHOW_THREADID = false;
    static final boolean SHOW_TIMESTAMP = false;

    /*static void setErrorPrint(boolean on) {

      err = on;
      }

      static void setDebugPrint(boolean on) {

      debug = on;
      }

      static void setTracePrint(boolean on) {

      trace = on;
      }

      static void setVerbosePrint(boolean on) {

      verbose = on;
      }

      static void setReleasePrint(boolean on) {

      release = on;
      }*/

    /**
     * Suppresses default constructor, ensuring non-instantiability.
     */
    private Printer() {
    }

    public static void err(String str) {

        if (err)
            println(str);
    }

    public static void debug(String str) {

        if (debug)
            println(str);
    }

    public static void trace(String str) {

        if (trace)
            println(str);
    }

    public static void verbose(String str) {

        if (verbose)
            println(str);
    }

    public static void release(String str) {

        if (release)
            println(str);
    }

    private static long startTime = 0;

    public static void println(String s) {
        String prepend = "";
        if (SHOW_THREADID) {
            prepend = "thread "  + Thread.currentThread().getId() + " " + prepend;
        }
        if (SHOW_TIMESTAMP) {
            if (startTime == 0) {
                startTime = System.nanoTime() / 1000000l;
            }
            prepend = prepend + ((System.nanoTime()/1000000l) - startTime) + "millis: ";
        }
        System.out.println(prepend + s);
    }

    public static void println() {
        System.out.println();
    }

}