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PORetrieving text from a JTextField and storing in another class's object
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  1. PORetrieving text from a JTextField and storing in another class's object
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    copied!<p>I'm currently working on a GUI based application and am using the code-generation feature of netbeans 7.1 along with some custom code of my own to make life easier for me.</p> <p>What I have is an array of JTextboxes from which I need to retrieve the Text and store in the respective object from an array of objects of a different class.</p> <p>The problem is that I'm receiving several runtime exceptions after submitting the data.</p> <p>Here's some relevant snippets of my code:</p> <p>My custom code for component creation :</p> <pre><code>plnlabel = new javax.swing.JLabel[3]; plntext = new javax.swing.JTextField[3]; int i; for(i=0;i&lt;3;i++) { plnlabel[i] = new JLabel("Player "+(i+1)+": "); plnlabel[i].setVisible(false); plntext[i] = new JTextField("Player"+(i+1)+" Name"); plntext[i].setVisible(false); } </code></pre> <p>I have 3 public data members</p> <pre><code>public int plnum; public int size; public Player [] players; </code></pre> <p>Now here's the code for the submit button that triggers the exceptions:</p> <pre><code> private void namesubActionPerformed(java.awt.event.ActionEvent evt) { plnum = nop.getSelectedIndex()+1; namesub.setVisible(false); customizelabel.setVisible(true); plnamelabel.setVisible(false); int i; for(i=0;i&lt;plnum;i++) { plnlabel[i].setVisible(false); plntext[i].setVisible(false); players[i].setName(plntext[i].getText()); } sizeb.setVisible(true); sizesel.setVisible(true); sizesub.setVisible(true); pack(); } </code></pre> <p>And here's the huge list of exceptions :</p> <pre><code>Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException at snakesnladders.SnakesnLadders.namesubActionPerformed(SnakesnLadders.java:146) at snakesnladders.SnakesnLadders.access$000(SnakesnLadders.java:12) at snakesnladders.SnakesnLadders$1.actionPerformed(SnakesnLadders.java:86) at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018) at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341) at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402) at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259) at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252) at java.awt.Component.processMouseEvent(Component.java:6505) at javax.swing.JComponent.processMouseEvent(JComponent.java:3321) at java.awt.Component.processEvent(Component.java:6270) at java.awt.Container.processEvent(Container.java:2229) at java.awt.Component.dispatchEventImpl(Component.java:4861) at java.awt.Container.dispatchEventImpl(Container.java:2287) at java.awt.Component.dispatchEvent(Component.java:4687) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422) at java.awt.Container.dispatchEventImpl(Container.java:2273) at java.awt.Window.dispatchEventImpl(Window.java:2713) at java.awt.Component.dispatchEvent(Component.java:4687) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:707) at java.awt.EventQueue.access$000(EventQueue.java:101) at java.awt.EventQueue$3.run(EventQueue.java:666) at java.awt.EventQueue$3.run(EventQueue.java:664) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76) at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87) at java.awt.EventQueue$4.run(EventQueue.java:680) at java.awt.EventQueue$4.run(EventQueue.java:678) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76) at java.awt.EventQueue.dispatchEvent(EventQueue.java:677) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:211) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105) at java.awt.EventDispatchThread.run(EventDispatchThread.java:90) </code></pre> <p>I can't figure out what's wrong with my code. Did some trial and error and the only thing I came up with is that if I store the getText() data in a local variable in the button click event method, then there's no error.</p> <p>I can basically print the getText() data but can't store it in the data member players[].</p> <p>Anyone know something about this?</p>
 

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