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1   /**
2    * Copyright 2012 The Apache Software Foundation
3    *
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *     http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing, software
15   * distributed under the License is distributed on an "AS IS" BASIS,
16   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17   * See the License for the specific language governing permissions and
18   * limitations under the License.
19   */
20  package org.apache.hadoop.hbase.util;
21  
22  /**
23   * A generic way for querying Java properties.
24   */
25  public class GetJavaProperty {
26    public static void main(String args[]) {
27      if (args.length == 0) {
28        for (Object prop: System.getProperties().keySet()) {
29          System.out.println(prop + "=" + System.getProperty((String)prop, ""));
30        }
31      } else {
32        for (String prop: args) {
33          System.out.println(System.getProperty(prop, ""));
34        }
35      }
36    }
37  }