Study notes--java inner class exercises

1. Try writing an anonymous inner class in the method.

Package Com.lzw;public class Anonymityinnerclass {}class outerclass4{public outinterface doit (final String s) {return new Outinterface () {private int i=0;public int getValue () {System.out.println (s); return i;} public void F () {System.out.println ("F ()");}};}} Interface Outinterface {//define an interface}

Anonymous inner class: New Outinterface () {

.......

} is written in the method of the external class Outerclass4.

2. Try writing the Main method in a static inner class.

 PackageCOM.LZW; Public classStaticinnerclass {intx=100; Static classinner{voidDoitinner () {//System.out.println ("external class" +x);        }         Public Static voidMain (String args[]) {System.out.println (A); }    }}

Note: The most characteristic of a static inner class is that non-static members of the outer class cannot be used.

3. Try to write a static inner class that creates an instance of its inner class in the Main method.

Package Test;public class Staticinnerclass {static Class a{void F () {System.out.println ("F ()");}} public static void Main (String args[]) {STATICINNERCLASS.A a=new a (); A.f ();}}

　　

Study notes--java inner class exercises