java - Updating a JLabel with a Static Integer -


so i'm new java, took class in highschool last year , want try , make own little 2d game im working on. have stats.java filled variables want stored, such cash, name, level, etc. right im trying add cash cash jlabel using button.

jbutton btnaddcash = new jbutton("add 10,000"); btnaddcash.addactionlistener(new actionlistener() {     public void actionperformed(actionevent e) {         stats.cash = (stats.cash + 5000);     } });  jlabel lblcash = new jlabel("cash: " +stats.cash); lblcash.setforeground(color.white); lblcash.setbounds(10, 649, 162, 14); contentpane.add(lblcash); lblcash.setfont(new font("airbusmcdua", font.bold, 15)); jbutton debugbtn = new jbutton("");

any awesome!

your problem here @ (a) , (b)

jbutton btnaddcash = new jbutton("add 10,000"); btnaddcash.addactionlistener(new actionlistener() {     public void actionperformed(actionevent e) {         stats.cash = (stats.cash + 5000); //     (a)     } });  jlabel lblcash = new jlabel("cash: " +stats.cash); //     (b)

understand when create jlabel holds present value of cash field , not hold reference field itself. important since updating cash field have no effect on jlabel's text. must explicitly change text:

btnaddcash.addactionlistener(new actionlistener() {     public void actionperformed(actionevent e) {         stats.cash = (stats.cash + 5000);             lblcash.settext("cash: " +stats.cash);  // ****** update text     } });

other issues:

  • again, avoid static unless have reason using this
  • look model-view-controller design pattern , study it. type of structure want use.
  • avoid absolute positioning of components (null layouts , setbounds) lead frustration, grief , poor gui's. use layout managers
  • consider learning javafx instead of swing since javafx being supported actively oracle while swing not.

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