Java - Create inner class

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Description

Create inner class

Demo

package simple_inner_classes;

class OuterClass {
  int i = 1; // instanceVariable

  void m() {/*ww w.j ava 2s.c  o m*/
  } // instanceMethod

  static int staticI = 1; // staticVariable

  static void staticM() {
  } // staticMethod

  // Inner class
  class InnerClass {
    int i = 2;// localvariable overrides outer variable

    public void method() {
      System.out.println("In InnerClass's method");

      i = 1; // OuterClass instanceVariable
      m(); // OuterClass instanceMethod

      staticI = 1; // OuterClass staticVariable
      staticM(); // OuterClass staticMethod

      System.out.println("OuterClass reference=" + OuterClass.this);
      System.out.println("InnerClass reference=" + this);

      OuterClass.this.i = 2;// Accessing OuterClass instanceVariable using
                  // OuerClass reference
      OuterClass.this.m();// Accessing OuterClass instanceMethod using
                // OuterClass reference

    }
  } // End InnerClass

  public static void main(String[] args) {
    // Creating instance of InnerClass
    // To Create inner class object outer class object is required
    new OuterClass().new InnerClass().method();
  }
}

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