Prints the system properties as [key: name]. - Java java.lang

Java examples for java.lang:System

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Description

Prints the system properties as [key: name].

Demo Code

/*/*from   w  ww  .j ava  2 s  .c o m*/
 * MiscUtils.java
 *
 * Copyright (C) 2002-2013 Takis Diakoumis
 *
 * This program 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 any later version.
 *
 * This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
 *
 */
//package com.java2s;

import java.util.Arrays;
import java.util.Enumeration;

import java.util.Properties;

public class Main {
    /**
     * Prints the system properties as [key: name].
     */
    public static void printSystemProperties() {
        String[][] properties = getSystemProperties();
        for (int i = 0; i < properties.length; i++) {
            System.out.println(properties[i][0] + ":\t" + properties[i][1]);
        }
    }

    /**
     * Returns the system properties from <code>System.getProperties()</code>
     * as a 2 dimensional array of key/name.
     */
    public static String[][] getSystemProperties() {
        Properties sysProps = System.getProperties();
        String[] keys = new String[sysProps.size()];

        int count = 0;
        for (Enumeration<?> i = sysProps.propertyNames(); i
                .hasMoreElements();) {
            keys[count++] = (String) i.nextElement();
        }

        Arrays.sort(keys);
        String[][] properties = new String[keys.length][2];
        for (int i = 0; i < keys.length; i++) {
            properties[i][0] = keys[i];
            properties[i][1] = sysProps.getProperty(keys[i]);
        }
        return properties;
    }
}

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