java - Changing Text Value of JLabel In Real Time -


i trying change text of jlabel (searchedstock) in real time. here code:

public void gamegui() {      gridbagconstraints c = new gridbagconstraints();     c.fill = gridbagconstraints.horizontal;     c.gridwidth = 2;     jlabel welcome = new jlabel("welcome " + playername + "!");     welcome.setfont(new font("arial", 1, 30));     gamepanel.add(welcome, c);     c.gridx = 0;     c.gridy = 1;     gamepanel.add(new jpanel(), c);     c.gridwidth = 1;     c.gridy = 2;     gamepanel.add(new jlabel("symbol search:"), c);     c.gridx = 1;     final jtextfield symbolsearch = new jtextfield(10);     gamepanel.add(symbolsearch, c);     c.gridx = 0;     c.gridy = 3;     gamepanel.add(new jpanel(), c);     c.gridx = 0;     c.gridy = 4;     c.gridwidth = 2;     jbutton search = new jbutton("search");     search.addactionlistener(new actionlistener() {          public void actionperformed(actionevent e){              stockvalue = double.tostring(getstocks(symbolsearch.gettext()));         }     });     gamepanel.add(search, c);     c.gridx = 0;     c.gridy = 5;     gamepanel.add(new jpanel(), c);     c.gridx = 0;     c.gridy = 6;     c.gridwidth = 2;     jlabel searchedstock = new jlabel(stockvalue);     gamepanel.add(searchedstock, c);     add(gamepanel); }

how can change value in realtime pressing button because listener in inner class? not have direct access jlabel, cannot use settext(); , issue.

you have @ least 2 options...

option #1

make jlabel final, have before inner listener...

public void gamegui() {     /*...*/     final jlabel searchedstock = new jlabel(stockvalue);     jbutton search = new jbutton("search");     search.addactionlistener(new actionlistener() {          public void actionperformed(actionevent e){              stockvalue = double.tostring(getstocks(symbolsearch.gettext()));             searchedstock.settext(numberformat.getnumberinstance().format(stockvalue));         }     });     gamepanel.add(search, c);     c.gridx = 0;     c.gridy = 5;     gamepanel.add(new jpanel(), c);     c.gridx = 0;     c.gridy = 6;     c.gridwidth = 2;     gamepanel.add(searchedstock, c);     add(gamepanel); }

option 2

make label class instance field...

private jlabel searchedstock;  public void gamegui() {     /*...*/     final jlabel searchedstock = new jlabel(stockvalue);     jbutton search = new jbutton("search");     search.addactionlistener(new actionlistener() {          public void actionperformed(actionevent e){              stockvalue = double.tostring(getstocks(symbolsearch.gettext()));             searchedstock.settext(numberformat.getnumberinstance().format(stockvalue));         }     });     gamepanel.add(search, c);     c.gridx = 0;     c.gridy = 5;     gamepanel.add(new jpanel(), c);     c.gridx = 0;     c.gridy = 6;     c.gridwidth = 2;     searchedstock = new jlabel(stockvalue);     gamepanel.add(searchedstock, c);     add(gamepanel); }

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