【Java學習筆記】靜態巢狀類和內部類
阿新 • • 發佈:2018-12-26
public class Outer { int outer_x = 100; class Inner{ public int y = 10; private int z = 9; int m = 5; public void display(){ System.out.println("display outer_x:"+ outer_x); } private void display2(){ System.out.println("display outer_x:"+ outer_x); } } void test(){ Inner inner = new Inner(); inner.display(); inner.display2(); //System.out.println("Inner y:" + y);//不能訪問內部內變數 System.out.println("Inner y:" + inner.y);//可以訪問 System.out.println("Inner z:" + inner.z);//可以訪問 System.out.println("Inner m:" + inner.m);//可以訪問 InnerTwo innerTwo = new InnerTwo(); innerTwo.show(); } class InnerTwo{ Inner innerx = new Inner(); public void show(){ //System.out.println(y);//不可訪問Innter的y成員 //System.out.println(Inner.y);//不可直接訪問Inner的任何成員和方法 innerx.display();//可以訪問 innerx.display2();//可以訪問 System.out.println(innerx.y);//可以訪問 System.out.println(innerx.z);//可以訪問 System.out.println(innerx.m);//可以訪問 } } public static void main(String args[]){ Outer outer = new Outer(); outer.test(); } }