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Here is the error message:
Exception in thread "main" java.lang.NullPointerException at test_announcements.TestForm.<init>(TestForm.java:17) at test_announcements.TestForm.main(TestForm.java:99) Java Result: 1
And here is my full source code:
package test_announcements;
import javax.swing.*;
import java.io.*;
public class TestForm extends javax.swing.JFrame {
TestForm() throws Exception{
super("TestForm");
String dir1 = "C:/Users/solba/";
String dir2 = "Desktop/";
String fileName = "Test.txt";
FileReader f=new FileReader(dir1 + dir2 + "/" + fileName);
BufferedReader brk=new BufferedReader(f);
String s;
while((s=brk.readLine())!=null){
textArea.append(s);
}
}
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jScrollPane1 = new javax.swing.JScrollPane();
jList1 = new javax.swing.JList();
jInternalFrame1 = new javax.swing.JInternalFrame();
jScrollPane3 = new javax.swing.JScrollPane();
jTextArea1 = new javax.swing.JTextArea();
jLabel1 = new javax.swing.JLabel();
jScrollPane2 = new javax.swing.JScrollPane();
textArea = new javax.swing.JTextArea();
jList1.setModel(new javax.swing.AbstractListModel() {
String[] strings = { "Item 1", "Item 2", "Item 3", "Item 4", "Item 5" };
public int getSize() { return strings.length; }
public Object getElementAt(int i) { return strings[i]; }
});
jScrollPane1.setViewportView(jList1);
jInternalFrame1.setVisible(true);
javax.swing.GroupLayout jInternalFrame1Layout = new javax.swing.GroupLayout(jInternalFrame1.getContentPane());
jInternalFrame1.getContentPane().setLayout(jInternalFrame1Layout);
jInternalFrame1Layout.setHorizontalGroup(
jInternalFrame1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 0, Short.MAX_VALUE)
);
jInternalFrame1Layout.setVerticalGroup(
jInternalFrame1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 0, Short.MAX_VALUE)
);
jTextArea1.setColumns(20);
jTextArea1.setRows(5);
jScrollPane3.setViewportView(jTextArea1);
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setBackground(new java.awt.Color(204, 204, 204));
jLabel1.setFont(new java.awt.Font("Impact", 2, 24)); // NOI18N
jLabel1.setText("TEST ANNOUNCEMENTS");
jLabel1.setToolTipText("");
textArea.setColumns(20);
textArea.setRows(5);
jScrollPane2.setViewportView(textArea);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(74, 74, 74)
.addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 280, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(0, 69, Short.MAX_VALUE))
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jScrollPane2)))
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jLabel1)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(jScrollPane2, javax.swing.GroupLayout.DEFAULT_SIZE, 264, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
public static void main(String args[]) throws Exception{
TestForm test=new TestForm();
test.pack();
test.setVisible(true);
test.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
// Variables declaration - do not modify
private javax.swing.JInternalFrame jInternalFrame1;
private javax.swing.JLabel jLabel1;
private javax.swing.JList jList1;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JScrollPane jScrollPane2;
private javax.swing.JScrollPane jScrollPane3;
private javax.swing.JTextArea jTextArea1;
private javax.swing.JTextArea textArea;
// End of variables declaration
}
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