Java- Variable Reference

Reference

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x-- Direct – reference of fields (class-level variables) inside the class

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x-- Qualified

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        x-- Instance ref/Non-static ref – using instance variable of the class.

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        x-- Static ref – using class-name itself.

Note: Direct non-static reference should not be made from a static context.

class StaticInstanceVars {

   String msg = "Hello World!";//class-level var.

   public static void main(String[] args) {

        String msg = "Hello World!";//local var.

        System.out.println(msg);

        //qualified static/class ref.

        System.out.println(Rectangle.company);

        //non-static qualified instance ref.

        StaticInstanceVars siv = new StaticInstanceVars();

        System.out.println(siv.msg);

   }

}

class Rectangle {

   public static String company = "Think Force";

   private int length = 0;

   private int breadth = 0;

}