GetProps.java Source code

Introduction

Here is the source code for GetProps.java

Source

/* From http://java.sun.com/docs/books/tutorial/index.html */

/*
 * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * -Redistribution of source code must retain the above copyright notice, this
 *  list of conditions and the following disclaimer.
 *
 * -Redistribution 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.
 *
 * Neither the name of Sun Microsystems, Inc. or the names of contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
 * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
 * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN")
 * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
 * AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
 * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
 * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY
 * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE,
 * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 *
 * You acknowledge that this software is not designed, licensed or intended
 * for use in the design, construction, operation or maintenance of any
 * nuclear facility.
 */

public class GetProps {

    public static void main(String[] args) {

        /* Test reading properties w & w/out security manager */

        String s;

        try {

            System.out.println("About to get os.name property value");

            s = System.getProperty("os.name", "not specified");
            System.out.println("  The name of your operating system is: " + s);

            System.out.println("About to get java.version property value");

            s = System.getProperty("java.version", "not specified");
            System.out.println("  The version of the JVM you are running is: " + s);

            System.out.println("About to get user.home property value");

            s = System.getProperty("user.home", "not specified");
            System.out.println("  Your user home directory is: " + s);

            System.out.println("About to get java.home property value");

            s = System.getProperty("java.home", "not specified");
            System.out.println("  Your JRE installation directory is: " + s);

        } catch (Exception e) {
            System.err.println("Caught exception " + e.toString());
        }

    }

}

//File: java.policy

/*
    
    
// Standard extensions get all permissions by default
    
grant codeBase "file:${java.home}/lib/ext/" {
   permission java.security.AllPermission;
};
    
// default permissions granted to all domains
    
grant { 
   // allows anyone to listen on un-privileged ports
   permission java.net.SocketPermission "localhost:1024-", "listen";
    
   // "standard" properies that can be read by anyone
    
   permission java.util.PropertyPermission "java.version", "read";
   permission java.util.PropertyPermission "java.vendor", "read";
   permission java.util.PropertyPermission "java.vendor.url", "read";
   permission java.util.PropertyPermission "java.class.version", "read";
   permission java.util.PropertyPermission "os.name", "read";
   permission java.util.PropertyPermission "os.version", "read";
   permission java.util.PropertyPermission "os.arch", "read";
   permission java.util.PropertyPermission "file.separator", "read";
   permission java.util.PropertyPermission "path.separator", "read";
   permission java.util.PropertyPermission "line.separator", "read";
    
   permission java.util.PropertyPermission "java.specification.version", "read";
   permission java.util.PropertyPermission "java.specification.vendor", "read";
   permission java.util.PropertyPermission "java.specification.name", "read";
    
   permission java.util.PropertyPermission "java.vm.specification.version", "read";
   permission java.util.PropertyPermission "java.vm.specification.vendor", "read";
   permission java.util.PropertyPermission "java.vm.specification.name", "read";
   permission java.util.PropertyPermission "java.vm.version", "read";
   permission java.util.PropertyPermission "java.vm.vendor", "read";
   permission java.util.PropertyPermission "java.vm.name", "read";
};
    
    
    
*/