how is the 'this' keyword of javascript is different from 'this' keyword of java?

Question

How is the 'this' keyword of javascript is different from 'this' keyword of java?any practical example will be appreciated.

var counter = {
  val: 0,
  increment: function () {
    this.val += 1;
  }
};
counter.increment();
console.log(counter.val); // 1
counter['increment']();
console.log(counter.val); // 2

in java:

 public Rectangle(int x, int y, int width, int height) {
        this.x = x;
        this.y = y;
        this.width = width;
        this.height = height;
    }

thanks.

Answer 1

In JavaScript this always refers to the “owner” of the function we're executing, or rather, to the object that a function is a method of.

In Java, this refers to the current instance object on which the method is executed.