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  /*
   * Copyright (C) 2012 The Guava Authors
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
 
 package com.google.common.base;
 
Represents a standard system property.

Author(s):
Kurt Alfred Kluever
Since:
15.0
 
 @GwtIncompatible("java.lang.System#getProperty")
 public enum StandardSystemProperty {

  
Java Runtime Environment version.
 
   JAVA_VERSION("java.version"),

  
Java Runtime Environment vendor.
 
   JAVA_VENDOR("java.vendor"),

  
Java vendor URL.
 
   JAVA_VENDOR_URL("java.vendor.url"),

  
Java installation directory.
 
   JAVA_HOME("java.home"),

  
Java Virtual Machine specification version.
 
   JAVA_VM_SPECIFICATION_VERSION("java.vm.specification.version"),

  
Java Virtual Machine specification vendor.
 
   JAVA_VM_SPECIFICATION_VENDOR("java.vm.specification.vendor"),

  
Java Virtual Machine specification name.
 
   JAVA_VM_SPECIFICATION_NAME("java.vm.specification.name"),

  
Java Virtual Machine implementation version.
 
   JAVA_VM_VERSION("java.vm.version"),

  
Java Virtual Machine implementation vendor.
 
   JAVA_VM_VENDOR("java.vm.vendor"),

  
Java Virtual Machine implementation name.
 
   JAVA_VM_NAME("java.vm.name"),

  
Java Runtime Environment specification version.
 
   JAVA_SPECIFICATION_VERSION("java.specification.version"),

  
Java Runtime Environment specification vendor.
 
   JAVA_SPECIFICATION_VENDOR("java.specification.vendor"),

  
Java Runtime Environment specification name.
 
   JAVA_SPECIFICATION_NAME("java.specification.name"),

  
Java class format version number.
 
   JAVA_CLASS_VERSION("java.class.version"),

  
Java class path.
 
   JAVA_CLASS_PATH("java.class.path"),

  
List of paths to search when loading libraries.
 
   JAVA_LIBRARY_PATH("java.library.path"),

  
Default temp file path.
 
   JAVA_IO_TMPDIR("java.io.tmpdir"),

  
Name of JIT compiler to use.
 
   JAVA_COMPILER("java.compiler"),

  
Path of extension directory or directories.
 
   JAVA_EXT_DIRS("java.ext.dirs"),

  
Operating system name.
 
   OS_NAME("os.name"),

  
Operating system architecture.
 
   OS_ARCH("os.arch"),

  
Operating system version.
 
   OS_VERSION("os.version"),

  
File separator ("/" on UNIX).
 
   FILE_SEPARATOR("file.separator"),

  
Path separator (":" on UNIX).
  PATH_SEPARATOR("path.separator"),

  
Line separator ("\n" on UNIX).
  LINE_SEPARATOR("line.separator"),

  
User's account name.
  USER_NAME("user.name"),

  
User's home directory.
  USER_HOME("user.home"),

  
User's current working directory.
  USER_DIR("user.dir");
  private final String key;
  private StandardSystemProperty(String key) {
    this. = key;
  }

  
Returns the key used to lookup this system property.
  public String key() {
    return ;
  }

  
Returns the current value for this system property by delegating to java.lang.System.getProperty(java.lang.String).
  public String value() {
    return System.getProperty();
  }

  
Returns a string representation of this system property.
  @Override public String toString() {
    return key() + "=" + value();
  }
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