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