This Keyword in JAVA

To refer a object is called reference variable.

“this” keyword is also a reference variable that refer to the current object.

Class Test
{
      int i;
      void SetValue(int i)
      {
         i=i;
      }
      void show()
      {
          System.out.println(i);
      }
}
class Demo
{
   public static void main(String[] args)
   {
      Test t = new Test();
      t.SetValue(10);
      t.show();
      }
}

Instance variables and local variables name are same put that are local value that time value of  I is zero

to resolve this program this.i referees to current instance of object that means I value is = 10

 

Class Test
{
      int i;
      void SetValue(int i)
      {
         this.i=i;
      }
      void show()
      {
          System.out.println(i);
      }
}
class Demo
{
   public static void main(String[] args)
   {
      Test t = new Test();
      t.SetValue(10);
      t.show();
      }
}