java - Why does my ActionListener only work for one of my buttons? -


this code:

import java.io.*; import javax.swing.*; import java.awt.event.* ;  class plugin extends jframe implements actionlistener {     jpanel pnl = new jpanel();      public static void main(string args[]) {         plugin gui = new plugin();     }      jtextfield progname = new jtextfield("program name");     jbutton pnameok = new jbutton("ok");      jtextfield endtxt = new jtextfield("type of file");     jbutton endok = new jbutton("ok");      jbutton stop = new jbutton("stop server");      public plugin() {         super();         add(pnl);         pnl.add(stop);         pnl.add(progname);         pnl.add(pnameok);          pnl.add(endtxt);         pnl.add(endok);          pnameok.addactionlistener(this);         endok.addactionlistener(this);          setdefaultcloseoperation(exit_on_close);         setvisible(true);     }      public void actionperformed( actionevent event ) {          if(event.getsource() == endok) {             try {                 string end = endtxt.gettext();                 filewriter endfile = new filewriter( end + ".txt" );             }             catch( ioexception e ) {                 boolean uselessend = true;             }              if(event.getsource() == pnameok) {                 try {                     string pname = progname.gettext();                     filewriter pnamefile = new filewriter( pname + ".txt" );                 }                 catch( ioexception e1 ) {                     boolean uselesspname = true;                     try {                         filewriter pnamefileuse = new filewriter( "error" );                     }                     catch( ioexception e2 ) {                         boolean completeandutterfail = true;                     }                 }              }         }     } }

when run it, enter yay program name , exe type of file , click both of ok buttons, new file called exe.txt no file called yay.txt. why this?

yes. have done stupid. , there mess of curly brackets over. remove end bracket (}) end , add after code:

catch( ioexception e ) {     boolean uselessend = true; }

so becomes this:

  catch( ioexception e ) {     boolean uselessend = true;   } }

that should fix it. sidenote: 1. make first letter of class name capital. (e.g. plugin). 2. indent code better readibility. 3. might want add e.printstacktrace() debugging in catch part of exceptions.


Comments

Post a Comment

Popular posts from this blog

c# - Validate object ID from GET to POST -

i have method allows user access comment have made on site. have post method lets them update comment. my normal solution send entire comment model through, let them update it, update on database when post back. involve sending commentid through in hiddenfor , can manipulated. how can verify commentid sent in get method same i'm getting in post , not able alter comment wish? how can verify commentid sent in method same i'm getting in post? basically have validate following things in post - user logged-in user. authenticated users post comments. commentid in post , should valid commentid , should present in database. userid associated logged-in user should same userid associated comment . comment should contain userid column, can check @ time of update. to make sure update happens comment has been sent in get - hold commentid in session , in post action compare commentid value in session .
Read more

node.js - Custom Model Validator SailsJS -

when using custom model validator checks record within model. return within spread doesn't seem end control flow. //post.js model /** * custom validator **/ types: { isuservalid: function(user_id) { var promise = require('bluebird'); promise.all([ user.findone({id: user_id}) ]) .spread(function(user) { console.log(user); if (user === null || user === undefined) { console.log('failed'); return false; }else{ console.log('passed'); return true; } }); } }, my response standard validation failed response. { "error": "e_validation", "status": 400, "summary": "1 attribute invalid", "model": "post", "invalidattributes": { "owner": [ { "rule": "isuservalid", ...
Read more

php - Find a regex to take part of Email -

i have following emails need extract part from: bestellnummer xxx: 1 von xxx, 1er pack ------------- anfang der nachricht ------------- foo bar baz foo bar baz // <<<<< need text here ------------- ende der nachricht ------------- ------------- anfang der nachricht ------------- foo bar baz foo bar baz ------------- ende der nachricht ------------- there 0 unlimited occurences of ------------- anfang der nachricht ------------- ------------- ende der nachricht ------------- and i'm able extract first part regex: $re = "/------------- .*? -------------.?(.*?).?------------- .*? -------------/s"; but, i'm quite new on learning regex, i'm pretty sure there must better regex extract part (foo bar baz foo bar baz) of text between ------------- anfang der nachricht ------------- ------------- ende der nachricht ------------- as can in different languages, i'm using .? to match between hyphens. i...
Read more