java - JOptionPane / Input Dialog -

i try input user :

int mynumber = integer.parseint((string) joptionpane.showinputdialog(                             frame,                             "number want:\n",                             "enter number",                             joptionpane.plain_message,                             null,                             null,                             "5")); 

it works i'm not sure user enter number in field , don't want numberformatexception thrown.

is there way set formatter joptionpane (like can text field jformattedtextfield setting decimalformat) ?

short answer: no, there no way it. joptionpane doesn't provide means validate input before closes.

one easy way around use jspinner. joptionpane allows components , arrays used message objects, can this:

int min = 1; int max = 10; int initial = 5;  jspinner inputfield =     new jspinner(new spinnernumbermodel(initial, min, max, 1));  int response = joptionpane.showoptiondialog(frame,     new object[] { "number want:\n", inputfield },     "enter number",     joptionpane.ok_cancel_option,     joptionpane.plain_message,     null, null, null);  if (response == joptionpane.ok_option) {     int mynumber = (integer) inputfield.getvalue();     // stuff mynumber here } else {     system.out.println("user canceled dialog."); } 

you can also, suggested, pass jformattedtextfield message object instead of jspinner.