Module java.desktop

Package javax.swing

Class UIDefaults.ProxyLazyValue

java.lang.Object

javax.swing.UIDefaults.ProxyLazyValue

All Implemented Interfaces:

UIDefaults.LazyValue

Enclosing class:

UIDefaults

public static class UIDefaults.ProxyLazyValue
extends Object
implements UIDefaults.LazyValue

This class provides an implementation of LazyValue which can be used to delay loading of the Class for the instance to be created. It also avoids creation of an anonymous inner class for the LazyValue subclass. Both of these improve performance at the time that a a Look and Feel is loaded, at the cost of a slight performance reduction the first time createValue is called (since Reflection APIs are used).

Since:

1.3

Constructor Summary

Constructors

Constructor	Description
ProxyLazyValue(String c)	Creates a LazyValue which will construct an instance when asked.
ProxyLazyValue(String c, Object[] o)	Creates a LazyValue which will construct an instance when asked.
ProxyLazyValue(String c, String m)	Creates a LazyValue which will construct an instance when asked.
ProxyLazyValue(String c, String m, Object[] o)	Creates a LazyValue which will construct an instance when asked.

Method Summary

Modifier and Type	Method	Description
Object	createValue(UIDefaults table)	Creates the value retrieved from the UIDefaults table.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ProxyLazyValue

public ProxyLazyValue(String c)

Creates a LazyValue which will construct an instance when asked.

Parameters:

c - a String specifying the classname of the instance to be created on demand

ProxyLazyValue

public ProxyLazyValue(String c,
                      String m)

Creates a LazyValue which will construct an instance when asked.

Parameters:

c - a String specifying the classname of the class containing a static method to be called for instance creation

m - a String specifying the static method to be called on class c

ProxyLazyValue

public ProxyLazyValue(String c,
                      Object[] o)

Creates a LazyValue which will construct an instance when asked.

Parameters:

c - a String specifying the classname of the instance to be created on demand

o - an array of Objects to be passed as paramaters to the constructor in class c

ProxyLazyValue

public ProxyLazyValue(String c,
                      String m,
                      Object[] o)

Creates a LazyValue which will construct an instance when asked.

Parameters:

c - a String specifying the classname of the class containing a static method to be called for instance creation.

m - a String specifying the static method to be called on class c

o - an array of Objects to be passed as paramaters to the static method in class c

Method Detail

createValue

public Object createValue(UIDefaults table)

Creates the value retrieved from the UIDefaults table. The object is created each time it is accessed.

Specified by:

createValue in interface UIDefaults.LazyValue

Parameters:

table - a UIDefaults table

Returns:

the created Object