请问这样的声明表示什么呢？多谢大家# Java - 爪哇娇娃
n*g
1 楼
final JLabel label = new JLabel("nonothing")
这里的一个类实例被声明为final代表什么呢？
多谢！
这里的一个类实例被声明为final代表什么呢？
多谢！
g*g
2 楼
Only means you can't assign label to another instance.
if you later on do
label = new JLabel("something"), it will yield compilation error.
You can do label.setxxx() and change its fields however.
【在 n*******g 的大作中提到】
: final JLabel label = new JLabel("nonothing")
: 这里的一个类实例被声明为final代表什么呢？
: 多谢！
if you later on do
label = new JLabel("something"), it will yield compilation error.
You can do label.setxxx() and change its fields however.
【在 n*******g 的大作中提到】
: final JLabel label = new JLabel("nonothing")
: 这里的一个类实例被声明为final代表什么呢？
: 多谢！
n*g
3 楼
thanks :)
【在 g*****g 的大作中提到】
: Only means you can't assign label to another instance.
: if you later on do
: label = new JLabel("something"), it will yield compilation error.
: You can do label.setxxx() and change its fields however.
【在 g*****g 的大作中提到】
: Only means you can't assign label to another instance.
: if you later on do
: label = new JLabel("something"), it will yield compilation error.
: You can do label.setxxx() and change its fields however.
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