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POint field validation in swing for user registration form
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2013-09-25T07:29:30.587
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2013-09-25T07:48:13.733
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2013-09-25T07:48:13.733
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Swing work I am having difficulties doing a simple validation of a text field that has as a value - an int variable. I need the following: <ul> <li>permit only digits</li> <li>don't allow a value of 0 or bellow</li> <li>It has to be mandatory to fill .</li> </ul> <pre><code>private void btnsaveActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: User controller=new User( new Integer(textuid.getText().trim()),textname.getText(), textpassword.getText(),textrepassword.getText()); controller.saveUser(db.getCon()); // int a= new Integer(textuid.getText().trim()); System.out.print(controller.getUid()); if(Integer.parseInt(textuid.getText()) <=0){ JOptionPane.showMessageDialog( textuid, "Must enter a value greater than zero"); } if(textuid.getText().equals("s")){ JOptionPane.showMessageDialog( textuid, "Must enter a value greater than zero"); } // if(textname.getText().equals("")) // { // JOptionPane.showMessageDialog( textname, "Name not empty"); // } // if(textpassword.getText().equals("")){ // JOptionPane.showMessageDialog( textname, "Password not empty"); // } // if(textrepassword.getText().equals("")){ // JOptionPane.showMessageDialog( textname, "Password not empty"); // } } </code></pre> show error message <pre><code>Exception in thread "AWT-EventQueue-0" java.lang.NumberFormatException: For input string: "" at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48) at java.lang.Integer.parseInt(Integer.java:470) at java.lang.Integer.<init>(Integer.java:660) at com.smart.ui.UserForm.btnsaveActionPerformed(UserForm.java:149) at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236) at java.awt.Component.processMouseEvent(Component.java:6267) at javax.swing.JComponent.processMouseEvent(JComponent.java:3267) at java.awt.Component.processEvent(Component.java:6032) at java.awt.Container.processEvent(Container.java:2041) at java.awt.Component.dispatchEventImpl(Component.java:4630) at java.awt.Container.dispatchEventImpl(Container.java:2099) at java.awt.Component.dispatchEvent(Component.java:4460) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4577) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168) at java.awt.Container.dispatchEventImpl(Container.java:2085) at java.awt.Window.dispatchEventImpl(Window.java:2478) at java.awt.Component.dispatchEvent(Component.java:4460) at java.awt.EventQueue.dispatchEvent(EventQueue.java:599) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161) at java.awt.EventDispatchThread.run(EventDispatchThread.java:122) </code></pre> I can't solve this. please help. it's my first post
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<java><swing>
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int field validation in swing for user registration form
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