新的声明方式，用def定义新属性

def 和 @Property

旧版本中（Groovy JSR 06 的之前版本）@Property定义一个带有setter和getter的私有属性，而def和java中public一样，定义一个公共的属性。

后来@Property已经从Groovy JSR 06中移除，在Grails 0.2和之后的版本中也不会再需要它 。

现在def用来定义一个带有setter和getter的私有属性，来代替了@Property。



参考：http://docs.codehaus.org/display/GroovyJSR/Property+proposal

symbol  meaning

	private
	protected
	public
	final

code field   getter   setter

def x
final x
public x
protected x
private x
public final x
@Property x
other permutations?

Proposed

code field   getter   setter note

def x
final x				the field doesn't need to be final IMHO (dk) My view is that the field should be final(tug)
public x
protected x
private x
public final x				a public final field like in Java
@Property x				if it's still supported (MrG) My proposal is to remove it (tug)
other permutations?				what happens with static? (MrG) Static behave exactly the same(tug)