JAVA EE: Java Tutorial : Java Nested Classes Categories

Tuesday, 5 January 2016

Java Tutorial : Java Nested Classes Categories

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Java Tutorial : Java Nested Classes Categories

OuterClass.java

public class OuterClass
{

    int a;

    public void outerDisplay()
    {
        System.out.println("Outer class display method : ");
    }

    /*
     * Nested classes that are declared static are called static nested classes.
     * 
     * Static nested classes do not have access to other members of the
     * enclosing class.
     */
    static class StaticNestedClass
    {
        int b;

        public void nestedStaticDisplay()
        {
            System.out.println("nested Static Display method : ");
        }
    }

    /*
     * Non-static nested classes are called inner classes.
     * 
     * As a member of the OuterClass, a nested class can be
     * declared private, public, protected, or package private. (outer classes
     * can only be declared public or package private.).
     * 
     * Non-static nested classes (inner classes) have access to other members of
     * the enclosing class, even if they are declared private. 
     */
    class InnerClass
    {
        int c;

        public void innerDisplay()
        {
            System.out.println("inner Display method : ");
        }
    }

}