java - How to Enlarge JButton Image when MouseOver "Mouse hovers over it" -

pretty "start" button wont enlarge when hover on it. here code below idea on why wont? , if show me example code help! :)"i'm still pretty new java too" thats why example code me better in advance!.

public class window extends jframe implements mouselistener {  private static final long serialversionuid = 1l; private static jbutton button; private static jframe frame = new jframe("scroller runner v0.2.0");  public static void main(string[] args) throws ioexception {     new window();     jbutton button = new jbutton();     jtextpane text = new jtextpane();     bufferedimage buttonicon;     button = new jbutton(new imageicon("c:\\users\\goulden\\desktop\\menu_start.png"));     button.setborder(borderfactory.createemptyborder());     button.setcontentareafilled(false);     button.setbounds(490, 250, 300, 75);     button.setcursor(new cursor(cursor.hand_cursor));     button.addmouselistener(null);      frame.setsize(1280, 720);     frame.setdefaultcloseoperation(jframe.exit_on_close);     frame.setlocationrelativeto(null);     frame.setvisible(true);     frame.setresizable(false);     frame.setcontentpane(new jlabel(new imageicon(imageio.read(new file("c:\\users\\goulden\\desktop\\main_menu.png")))));     frame.pack();     frame.add(button);     frame.setvisible(true); }@override public void mouseentered(mouseevent e) {     button.setbounds(550, 300, 300, 75);     this.repaint(); } 

this piece of code works me.

as want change size setsize() better this.

    button.addmouselistener(new java.awt.event.mouseadapter() {         public void mouseentered(java.awt.event.mouseevent evt) {                             button.setsize(width,height);                         }     });