// StatusProperties - display the system properties of the Java virtual machine
//
// Copyright (C)1996,1998 by Jef Poskanzer <jef@mail.acme.com>. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
// SUCH DAMAGE.

import java.applet.*;
import java.awt.*;
import java.io.*;
import java.util.*;

public class StatusProperties extends Applet
    {

    // Applet info.
    public String getAppletInfo()
	{
	return getClass().getName() +
" - Copyright (C) 1996 by Jef Poskanzer <jef@mail.acme.com>.  All rights reserved.";
	}


    TextArea textArea;


    // Called when the applet is first created.
    public void init()
	{
	Acme.GuiUtils.handleBgcolor( this );

	setLayout( new BorderLayout() );
	textArea = new TextArea();
	textArea.setEditable( false );
	add( "Center", textArea );
	validate();

	Enumeration names = getNames();

	textArea.setText( "" );
	while ( names.hasMoreElements() )
	    {
	    String name = (String) names.nextElement();
	    tryProp( name );
	    if ( ! name.endsWith( ".applet" ) )
		tryProp( name + ".applet" );
	    }
	}


    private Enumeration getNames()
	{
	try
	    {
	    Properties props = System.getProperties();
	    return props.propertyNames();
	    }
	catch ( SecurityException e )
	    {
	    // If we can't read the list of properties, use a default list.
	    return new StringTokenizer(
		"awt.appletWarning " +
		"awt.toolkit " +
		"browser " +
		"browser.vendor " +
		"browser.vendor.url " +
		"browser.version " +
		"file.encoding " +
		"file.encoding.pkg " +
		"file.separator " +
		"java.class.path " +
		"java.class.version " +
		"java.home " +
		"java.vendor " +
		"java.vendor.url " +
		"java.version " +
		"line.separator " +
		"os.arch " +
		"os.name " +
		"os.version " +
		"package.restrict.definition.java " +
		"package.restrict.definition.netscape " +
		"package.restrict.definition.sun " +
		"path.separator " +
		"trustProxy " +
		"user.dir " +
		"user.home " +
		"user.language " +
		"user.name " +
		"user.timezone " +
		"" );
	    }
	}


    private void tryProp( String name )
	{
	try
	    {
	    String value = System.getProperty( name );
	    if ( value != null )
		textArea.appendText( name + ":    " + value + "\n" );
		// textArea.append( name + ":    " + value + "\n" );
	    }
	catch ( SecurityException ignore ) {}
	}


    // Main program, so we can run as an application too.
    public static void main( String[] args )
	{
	new Acme.MainFrame( new StatusProperties(), args, 400, 500 );
	}

    }