20.18

java.lang.System

THE PACKAGE JAVA.LANG

20.18.8

public static void setProperties(Properties props)

throws SecurityException

First, if there is a security manager, its

checkPropertiesAccess

 method

( 20.17.15) is called with no arguments.

The argument becomes the current set of system properties for use by the

getProperty

 method. See the class

Properties

 ( 21.6). If the argument is

null

, then the current set of system properties is forgotten.

20.18.9

public static String getProperty(String key)

throws SecurityException

First, if there is a security manager, its

checkPropertyAccess

 method

( 20.17.16) is called with the

key

 as its argument.

If there is no current set of system properties, a set of system properties is first

created and initialized in the same manner as for the

getProperties

 method

( 20.18.7).

The system property value associated with the specified

key

 string is returned.

If there is no property with that key, then

null

 is returned.

20.18.10

public static String getProperty(String key,

String defaults)

throws SecurityException

First, if there is a security manager, its

checkPropertyAccess

 method

( 20.17.16) is called with the

key

 as its argument.

If there is no current set of system properties, a set of system properties is first

created and initialized in the same manner as for the

getProperties

 method

( 20.18.7).

The system property value associated with the specified

key

 string is returned.

If there is no property with that key, then the argument

defaults

 is returned.

20.18.11

public static void exit(int status)

throws SecurityException

This method terminates the currently running Java Virtual Machine. The argument

serves as a status code; by convention, a nonzero status code indicates abnormal

termination.

This method never returns normally.

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