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System Properties

This topic lists system properties that can be accessed by unsigned rich Internet applications (RIAs) that are launched with or without the Java Network Launch Protocol (JNLP). Some system properties cannot be accessed by unsigned RIAs.

Secure System Properties Accessible by All RIAs

All RIAs can retrieve the following secure system properties:

java.class.version

    
    java.vendor
    java.vendor.url

    java.version    
    os.name

    os.arch

    os.version

    file.separator

    path.separator

    line.separator




Secure System Properties Accessible by RIAs Launched by Using JNLP
RIAs launched by using JNLP can set and retrieve the 
following secure properties:

    awt.useSystemAAFontSettings    
    http.agent
    http.keepAlive    
    java.awt.syncLWRequests
    java.awt.Window.locationByPlatform
    javaws.cfg.jauthenticator
    javax.swing.defaultlf        
    sun.awt.noerasebackground
    sun.awt.erasebackgroundonresize    
    sun.java2d.d3d    
    sun.java2d.dpiaware
    sun.java2d.noddraw            
    sun.java2d.opengl        
    swing.boldMetal    
    swing.metalTheme
    swing.noxp
    swing.useSystemFontSettings    



Forbidden System Properties
Unsigned RIAs cannot access the following 
system properties:

    java.class.path
    java.home
    user.dir
    user.home
    user.name


        
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