What is difference between static and non-static inner class
Answer : Below are difference between a static and non-static inner class:
static inner class | non-static inner class |
| A non-static class or inner class has full access to its members of the class within which it is created | static nested class cannot invoke non-static methods or access non-static fields of an instance of the class within which it is created |
| Static inner class can declare both static and non- static members | Non static inner class cannot declare static field and static methods |
| static methods can access to its static members of main class and cannot access non static inner class members. You can access members of non-static inner class after create object of non-static inner class. | Non-static inner class cannot access static member of the class within it created |
Example:
package com.javahonk.staticTest; public class StaticTest { String var = "non-static inner class"; static String var2 = "Static inner class"; static class innserStaticTest { void staticClassMethod() { System.out.println(var2); } } class nonStaticTest { void nonstaticClassMethod() { System.out.println(var); System.out.println(var2); } } public static void main(String args[]) { innserStaticTest iStaticTest = new innserStaticTest(); iStaticTest.staticClassMethod(); StaticTest staticTest = new StaticTest(); StaticTest.nonStaticTest noStaticTest = staticTest.new nonStaticTest(); noStaticTest.nonstaticClassMethod(); } }
Output:
Static inner class non-static inner class Static inner class
