THE PACKAGE JAVA.LANG

java.lang.System

20.18

20.18.6

public static long currentTimeMillis()

Returns the difference, measured in milliseconds, between the current time and

the standard base time known as  the epoch,  00:00:00 GMT on January 1, 1970.

See the description of the class

Date

 ( 21.3) for a discussion of slight discrepan 

cies that may arise between  computer time  and UTC (Coordinated Universal

Time).

20.18.7

public static Properties getProperties()

throws SecurityException

First, if there is a security manager, its

checkPropertiesAccess

 method

( 20.17.15) is called with no arguments.

The current set of system properties for use by the

getProperty

 method is

returned as a Properties object ( 21.6). If there is no current set of system proper 

ties, a set of system properties is first created and initialized. This set of system

properties always includes values for the following keys:

Key

Description of associated value

java.version

Java version number

java.vendor

Java vendor specific string

java.vendor.url

Java vendor URL

java.home

Java installation directory

java.class.version

Java class format version number

java.class.path

Java classpath

os.name

Operating system name

os.arch

Operating system architecture

os.version

Operating system version

file.separator

File separator (

/

 on UNIX)

path.separator

Path separator (

:

 on UNIX)

line.separator

Line separator (

\n

 on UNIX)

user.name

User account name

user.home

User home directory

user.dir

User s current working directory

Note that even if the security manager does not permit the

getProperties

operation, it may choose to permit the

getProperty

 operation ( 20.18.9).

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