Junior Bill gates Junior Bill gates - 1 year ago 64
Java Question

Use of "this" keyword in java

I was studying method overriding in Java when ai came across the

keyword. After searching much about this on the Internet and other sources, I concluded that the
keyword is used when the name of an instance variables is same to the constructor function
parameters. Am I right or wrong?

Answer Source

this is an alias or a name for the current instance inside the instance. It is useful for disambiguating instance variables from locals (including parameters), but it can be used by itself to simply refer to member variables and methods, invoke other constructor overloads, or simply to refer to the instance. Some examples of applicable uses (not exhaustive):

class Foo
     private int bar; 

     public Foo() {
          this(42); // invoke parameterized constructor

     public Foo(int bar) {
         this.bar = bar; // disambiguate 

     public void frob() {
          this.baz(); // used "just because"

     private void baz() {

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