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Inner Class Back
- Inner Class(內部類): 指的是嵌套在類裏面的類.
- 內部類多了Private和Protected的修飾符(跟成員級別的修飾符含義一樣)
| Type |
Description |
| 成員內部類 |
定義在類裏的類, 作為一個外部類的成員 |
| 局部內部類 |
定義在方法內的類 |
| 匿名內部類 |
只定義一次的內部類 |
內部類訪問外部類
- 可直接訪問(但靜態內部類不能訪問外部類的非靜態成員)
外部類訪問內部類
| 成員類型 |
訪問方式 |
| 靜態成員 |
InnerClass.member; |
| 非靜態成員 |
new InnerClass().member; |
定義(Definition)
OutterClass oc = new OutterClass();
OutterClass.InnerClass a = oc.new Innerclass();
作用域(Scope)
x = 1;
this.x = 1;
OutterClass.this.x = 1;
匿名內部類(Unnamed Inner Class)
- 不能定義Constructor(只能使用默認無參數的Constructor)
- 不能是抽象類
addMouseListner(new MouseAdapter()
{
public void MouseEntered()
{
}
}
);
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