20.17

java.lang.SecurityManager

THE PACKAGE JAVA.LANG

20.17.15

public void checkPropertiesAccess()

throws SecurityException

The general contract of this method is that it should throw a

SecurityException

if getting or setting the system properties data structure is not permitted.

This method is invoked for the current security manager ( 20.18.4) by the

methods

getProperties

 ( 20.18.7) and

setProperties

 ( 20.18.8) of class

System

.

The

checkPropertiesAccess

 method defined by class

SecurityManager

always throws a

SecurityException

. A subclass must override this method if a

properties access operation is to be permitted with a security manager installed.

20.17.16

public void checkPropertyAccess(String key)

throws SecurityException

The general contract of this method is that it should throw a

SecurityException

if getting the value of the system property named by the

key

 is not permitted.

This method is invoked for the current security manager ( 20.18.4) by the

methods

getProperty

 of one argument ( 20.18.9) and

getProperty

 of two

arguments ( 20.18.10) of class

System

.

The

checkPropertyAccess

 method defined by class

SecurityManager

always throws a

SecurityException

. A subclass must override this method if

accessing the value of a system property is to be permitted with a security man 

ager installed.

20.17.17

public void checkLink(String libname)

throws SecurityException

The general contract of this method is that it should throw a

SecurityException

if dynamic linking of the specified library code file is not permitted. The argument

may be a simple library name or a complete file name.

This method is invoked for the current security manager ( 20.18.4) by meth 

ods

load

 ( 20.16.13) and

loadLibrary

 ( 20.16.14) of class

Runtime

.

The

checkLink

 method defined by class

SecurityManager

 always throws a

SecurityException

. A subclass must override this method if a dynamic code

linking operation is to be permitted with a security manager installed.

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