java - making a simple ball class for moving ball but not moving -

i'm making simple program moving ball, unfortunately it's not moving, when put values x=5, , y=4 after running program it's showing "ball @ (0.0,0.0)" on console please mistake.

public class ball {     private double x,y; //private variables...  //creating constructors.. public void ball(double x, double y) {     this.x=x;     this.y=y; } public void ball() {     x=5.0;     y=4.0; } //getter , setter private variables.... public double getx() {     return x; } public void setx() {     this.x=x; } public double gety() {     return y; } public void sety() {     this.y=y; } public void setxy(double x, double y) {     this.x=x;     this.y=y; } public void move(double xdisp, double ydisp) {     x+=xdisp;     y+=xdisp; } public string tostring() {     return "ball @ ("+x+","+y+")"; } public static void main(string[] args) {     ball b=new ball();     system.out.println(b); } 

}

you don't have constructors, default 1 called, nothing x , y.

in order have intended to, should provide constructor (you're there), remove void modifier:

public void ball()

now, constructor. note should same other meant-to-be-constructor.