'''
import Project.ConnectionProvider;
import java.sql.*;
import java.text.SimpleDateFormat;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JOptionPane;
public class addNewDonor extends javax.swing.JFrame {
public addNewDonor() {
initComponents();
}
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jLabel1 = new javax.swing.JLabel();
jSeparator1 = new javax.swing.JSeparator();
jLabel2 = new javax.swing.JLabel();
jLabel3 = new javax.swing.JLabel();
jLabel4 = new javax.swing.JLabel();
jLabel5 = new javax.swing.JLabel();
jLabel6 = new javax.swing.JLabel();
jLabel7 = new javax.swing.JLabel();
jLabel8 = new javax.swing.JLabel();
jLabel9 = new javax.swing.JLabel();
jLabel10 = new javax.swing.JLabel();
jLabel11 = new javax.swing.JLabel();
jLabel12 = new javax.swing.JLabel();
jTextField1 = new javax.swing.JTextField();
jDateChooser1 = new com.toedter.calendar.JDateChooser();
jDateChooser2 = new com.toedter.calendar.JDateChooser();
jTextField2 = new javax.swing.JTextField();
jComboBox1 = new javax.swing.JComboBox<>();
jTextField3 = new javax.swing.JTextField();
jComboBox2 = new javax.swing.JComboBox<>();
jTextField4 = new javax.swing.JTextField();
jScrollPane1 = new javax.swing.JScrollPane();
jTextArea1 = new javax.swing.JTextArea();
jButton1 = new javax.swing.JButton();
jButton2 = new javax.swing.JButton();
jButton3 = new javax.swing.JButton();
jLabel13 = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setLocation(new java.awt.Point(600, 250));
setUndecorated(true);
addComponentListener(new java.awt.event.ComponentAdapter() {
public void componentShown(java.awt.event.ComponentEvent evt) {
formComponentShown(evt);
}
});
getContentPane().setLayout(new org.netbeans.lib.awtextra.AbsoluteLayout());
jLabel1.setFont(new java.awt.Font("Harrington", 1, 36));
jLabel1.setForeground(new java.awt.Color(255, 255, 255));
jLabel1.setText("Add New Donor");
getContentPane().add(jLabel1, new org.netbeans.lib.awtextra.AbsoluteConstraints(264, 13, -1, -1));
getContentPane().add(jSeparator1, new org.netbeans.lib.awtextra.AbsoluteConstraints(12, 63, 826, -1));
jLabel2.setFont(new java.awt.Font("Harrington", 1, 18));
jLabel2.setForeground(new java.awt.Color(255, 255, 255));
jLabel2.setText("New Donor ID");
getContentPane().add(jLabel2, new org.netbeans.lib.awtextra.AbsoluteConstraints(41, 103, -1, -1));
jLabel3.setFont(new java.awt.Font("Tahoma", 1, 18));
jLabel3.setForeground(new java.awt.Color(255, 255, 255));
getContentPane().add(jLabel3, new org.netbeans.lib.awtextra.AbsoluteConstraints(230, 100, 50, 30));
jLabel4.setFont(new java.awt.Font("Harrington", 1, 18));
jLabel4.setForeground(new java.awt.Color(255, 255, 255));
jLabel4.setText("Full Name");
getContentPane().add(jLabel4, new org.netbeans.lib.awtextra.AbsoluteConstraints(41, 158, -1, -1));
jLabel5.setFont(new java.awt.Font("Harrington", 1, 18));
jLabel5.setForeground(new java.awt.Color(255, 255, 255));
jLabel5.setText("Date of Birth");
getContentPane().add(jLabel5, new org.netbeans.lib.awtextra.AbsoluteConstraints(41, 217, -1, -1));
jLabel6.setFont(new java.awt.Font("Harrington", 1, 18));
jLabel6.setForeground(new java.awt.Color(255, 255, 255));
jLabel6.setText("Date of Donation");
getContentPane().add(jLabel6, new org.netbeans.lib.awtextra.AbsoluteConstraints(41, 281, -1, -1));
jLabel7.setFont(new java.awt.Font("Harrington", 1, 18));
jLabel7.setForeground(new java.awt.Color(255, 255, 255));
jLabel7.setText("Mobile No.");
getContentPane().add(jLabel7, new org.netbeans.lib.awtextra.AbsoluteConstraints(41, 345, -1, -1));
jLabel8.setFont(new java.awt.Font("Harrington", 1, 18));
jLabel8.setForeground(new java.awt.Color(255, 255, 255));
jLabel8.setText("Gender");
getContentPane().add(jLabel8, new org.netbeans.lib.awtextra.AbsoluteConstraints(41, 417, -1, -1));
jLabel9.setFont(new java.awt.Font("Harrington", 1, 18));
jLabel9.setForeground(new java.awt.Color(255, 255, 255));
jLabel9.setText("Email");
getContentPane().add(jLabel9, new org.netbeans.lib.awtextra.AbsoluteConstraints(478, 158, -1, -1));
jLabel10.setFont(new java.awt.Font("Harrington", 1, 18));
jLabel10.setForeground(new java.awt.Color(255, 255, 255));
jLabel10.setText("Blood Group");
getContentPane().add(jLabel10, new org.netbeans.lib.awtextra.AbsoluteConstraints(478, 217, -1, -1));
jLabel11.setFont(new java.awt.Font("Harrington", 1, 18));
jLabel11.setForeground(new java.awt.Color(255, 255, 255));
jLabel11.setText("City");
getContentPane().add(jLabel11, new org.netbeans.lib.awtextra.AbsoluteConstraints(478, 282, -1, -1));
jLabel12.setFont(new java.awt.Font("Harrington", 1, 18));
jLabel12.setForeground(new java.awt.Color(255, 255, 255));
jLabel12.setText("Address");
getContentPane().add(jLabel12, new org.netbeans.lib.awtextra.AbsoluteConstraints(478, 345, -1, -1));
jTextField1.setFont(new java.awt.Font("Verdana", 1, 14)); // NOI18N
getContentPane().add(jTextField1, new org.netbeans.lib.awtextra.AbsoluteConstraints(224, 157, 170, -1));
getContentPane().add(jDateChooser1, new org.netbeans.lib.awtextra.AbsoluteConstraints(224, 216, 170, -1));
getContentPane().add(jDateChooser2, new org.netbeans.lib.awtextra.AbsoluteConstraints(224, 281, 170, -1));
jTextField2.setFont(new java.awt.Font("Verdana", 1, 14)); // NOI18N
getContentPane().add(jTextField2, new org.netbeans.lib.awtextra.AbsoluteConstraints(224, 344, 170, -1));
jComboBox1.setFont(new java.awt.Font("Verdana", 1, 14)); // NOI18N
jComboBox1.setModel(new javax.swing.DefaultComboBoxModel<>(new String[] { "Female", "Male", "Others" }));
getContentPane().add(jComboBox1, new org.netbeans.lib.awtextra.AbsoluteConstraints(224, 416, 170, -1));
jTextField3.setFont(new java.awt.Font("Verdana", 1, 14)); // NOI18N
getContentPane().add(jTextField3, new org.netbeans.lib.awtextra.AbsoluteConstraints(630, 157, 170, -1));
jComboBox2.setFont(new java.awt.Font("Verdana", 1, 14)); // NOI18N
jComboBox2.setModel(new javax.swing.DefaultComboBoxModel<>(new String[] { "A+", "A-", "B+", "B-", "O+", "O-", "AB+", "AB-" }));
getContentPane().add(jComboBox2, new org.netbeans.lib.awtextra.AbsoluteConstraints(630, 216, 170, -1));
jTextField4.setFont(new java.awt.Font("Verdana", 1, 14)); // NOI18N
getContentPane().add(jTextField4, new org.netbeans.lib.awtextra.AbsoluteConstraints(630, 281, 170, -1));
jTextArea1.setColumns(20);
jTextArea1.setFont(new java.awt.Font("Verdana", 1, 14)); // NOI18N
jTextArea1.setRows(5);
jScrollPane1.setViewportView(jTextArea1);
getContentPane().add(jScrollPane1, new org.netbeans.lib.awtextra.AbsoluteConstraints(630, 344, 170, -1));
jButton1.setBackground(new java.awt.Color(0, 102, 0));
jButton1.setFont(new java.awt.Font("Harrington", 1, 24)); // NOI18N
jButton1.setForeground(new java.awt.Color(255, 255, 255));
jButton1.setText("Save");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
getContentPane().add(jButton1, new org.netbeans.lib.awtextra.AbsoluteConstraints(156, 510, -1, -1));
jButton2.setBackground(new java.awt.Color(0, 0, 102));
jButton2.setFont(new java.awt.Font("Harrington", 1, 24)); // NOI18N
jButton2.setForeground(new java.awt.Color(255, 255, 255));
jButton2.setText("Reset");
jButton2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton2ActionPerformed(evt);
}
});
getContentPane().add(jButton2, new org.netbeans.lib.awtextra.AbsoluteConstraints(384, 510, -1, -1));
jButton3.setBackground(new java.awt.Color(153, 0, 0));
jButton3.setFont(new java.awt.Font("Harrington", 1, 24)); // NOI18N
jButton3.setForeground(new java.awt.Color(255, 255, 255));
jButton3.setText("Close");
jButton3.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton3ActionPerformed(evt);
}
});
getContentPane().add(jButton3, new org.netbeans.lib.awtextra.AbsoluteConstraints(596, 510, -1, -1));
jLabel13.setIcon(new javax.swing.ImageIcon(getClass().getResource("/background.jpg")));
jLabel13.setText("00");
getContentPane().add(jLabel13, new org.netbeans.lib.awtextra.AbsoluteConstraints(0, 0, 850, -1));
pack();
}// </editor-fold>
private void formComponentShown(java.awt.event.ComponentEvent evt) {
try {
// TODO add your handling code here:
int id = 1;
String str = String.valueOf(id);
jLabel3.setText(str);
Connection con = ConnectionProvider.getCon();
Statement st = con.createStatement();
ResultSet rs = st.executeQuery("select max(donorId) from addDonor");
while(rs.next())
{
id = rs.getInt(1);
id = id+1;
String str1 = String.valueOf(id);
jLabel3.setText(str1);
}
/*catch(Exception e)
{
JOptionPane.showMessageDialog(null, e);
}*/
} catch (SQLException ex) {
Logger.getLogger(addNewDonor.class.getName()).log(Level.SEVERE, null, ex);
}
}
private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
setVisible(false);
}
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
setVisible(false);
new addNewDonor().setVisible(true);
}
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
String donorId = jLabel3.getText();
String name = jTextField1.getText();
SimpleDateFormat dFormat = new SimpleDateFormat("dd-MM-yyyy");
String DOB = dFormat.format(jDateChooser1.getDate());
String DOD = dFormat.format(jDateChooser2.getDate());
String MobileNo = jTextField2.getText();
String gender = (String)jComboBox1.getSelectedItem();
String email = jTextField3.getText();
String bloodGroup = (String)jComboBox2.getSelectedItem();
String city = jTextField4.getText();
String address = jTextArea1.getText();
try
{
Connection con = ConnectionProvider.getCon();
PreparedStatement ps = con.prepareStatement("insert into addDonor values(?,?,?,?,?,?,?,?,?,?)");
ps.setString(1, donorId);
ps.setString(2, name);
ps.setString(3, DOB);
ps.setString(4, DOD);
ps.setString(5, MobileNo);
ps.setString(6, gender);
ps.setString(7, email);
ps.setString(8, bloodGroup);
ps.setString(9, city);
ps.setString(10, address);
ps.executeUpdate();
JOptionPane.showMessageDialog(null, "Successfully Added");
setVisible(false);
new addNewDonor().setVisible(true);
}
catch(Exception e)
{
JOptionPane.showMessageDialog(null, e);
}
}
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(addNewDonor.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(addNewDonor.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(addNewDonor.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(addNewDonor.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new addNewDonor().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton2;
private javax.swing.JButton jButton3;
private javax.swing.JComboBox<String> jComboBox1;
private javax.swing.JComboBox<String> jComboBox2;
private com.toedter.calendar.JDateChooser jDateChooser1;
private com.toedter.calendar.JDateChooser jDateChooser2;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel10;
private javax.swing.JLabel jLabel11;
private javax.swing.JLabel jLabel12;
private javax.swing.JLabel jLabel13;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JLabel jLabel4;
private javax.swing.JLabel jLabel5;
private javax.swing.JLabel jLabel6;
private javax.swing.JLabel jLabel7;
private javax.swing.JLabel jLabel8;
private javax.swing.JLabel jLabel9;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JSeparator jSeparator1;
private javax.swing.JTextArea jTextArea1;
private javax.swing.JTextField jTextField1;
private javax.swing.JTextField jTextField2;
private javax.swing.JTextField jTextField3;
private javax.swing.JTextField jTextField4;
// End of variables declaration
}
''' I am a student and I am going to create a java based application project -Blood Bank Management System in Netbeans using JFrame, JDBC. This code is used for adding new donors to our project and got the donor id automatically. To store the database we created a table in MySQL and connected it with our source code. After running the code we got these exceptions . The exceptions are here :
'''
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at addNewDonor.formComponentShown(addNewDonor.java:211)
at addNewDonor.access$000(addNewDonor.java:17)
at addNewDonor$1.componentShown(addNewDonor.java:70)
at java.awt.AWTEventMulticaster.componentShown(AWTEventMulticaster.java:179)
at java.awt.AWTEventMulticaster.componentShown(AWTEventMulticaster.java:179)
at java.awt.Component.processComponentEvent(Component.java:6371)
at java.awt.Component.processEvent(Component.java:6319)
at java.awt.Container.processEvent(Container.java:2239)
at java.awt.Window.processEvent(Window.java:2025)
at java.awt.Component.dispatchEventImpl(Component.java:4889)
at java.awt.Container.dispatchEventImpl(Container.java:2297)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:760)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:84)
at java.awt.EventQueue$4.run(EventQueue.java:733)
at java.awt.EventQueue$4.run(EventQueue.java:731)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:730)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
'''
Please help me to solve these errors. It's a very importent part of our project.
