proper use of 'this' in Java -

i'm beginner java programmer , wanted on code i'm writing please can confirm if right use of this keyword

public class readfile {      private string path; // string store filename , path.       public readfile(string path){         this.path;     } } 

within instance method or constructor, this reference current object — object method or constructor being called. can refer member of current object within instance method or constructor using this

as answers above suggest, can this pointing member variable , use invoke constructor within constructor.

see below example

public class rectangle { private int x, y; private int width, height;  public rectangle() {     this(0, 0, 1, 1); } public rectangle(int width, int height) {     this(0, 0, width, height); } public rectangle(int x, int y, int width, int height) {     this.x = x;     this.y = y;     this.width = width;     this.height = height; } ... } 

refer here more information.

hope helps