'(Solved)Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException javax.swing.ImageIcon.<init> Resource file does exists
According to this video https://www.youtube.com/watch?v=n_Y7r-7GxDo I need to place the icons in the main package. Even after this, I get the same error
package Source;
/*
* Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
* Click nbfs://nbhost/SystemFileSystem/Templates/GUIForms/JFrame.java to edit this template
*/
/**
*
* @author tanuj
*/
public class Window extends javax.swing.JFrame {
/**
* Creates new form Window
*/
public Window() {
initComponents();
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jPanel1 = new javax.swing.JPanel();
jPanel3 = new javax.swing.JPanel();
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
jPanel4 = new javax.swing.JPanel();
jLabel3 = new javax.swing.JLabel();
jLabel4 = new javax.swing.JLabel();
jPanel5 = new javax.swing.JPanel();
jLabel5 = new javax.swing.JLabel();
jLabel6 = new javax.swing.JLabel();
jPanel6 = new javax.swing.JPanel();
jLabel7 = new javax.swing.JLabel();
jLabel8 = new javax.swing.JLabel();
jPanel2 = new javax.swing.JPanel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setCursor(new java.awt.Cursor(java.awt.Cursor.DEFAULT_CURSOR));
setMaximumSize(new java.awt.Dimension(900, 550));
setUndecorated(true);
setPreferredSize(new java.awt.Dimension(900, 600));
setResizable(false);
setSize(new java.awt.Dimension(900, 600));
getContentPane().setLayout(new org.netbeans.lib.awtextra.AbsoluteLayout());
jPanel1.setBackground(new java.awt.Color(48, 71, 94));
jPanel1.setLayout(new org.netbeans.lib.awtextra.AbsoluteLayout());
jPanel3.setBackground(new java.awt.Color(34, 40, 49));
jPanel3.setCursor(new java.awt.Cursor(java.awt.Cursor.HAND_CURSOR));
jPanel3.setLayout(new org.netbeans.lib.awtextra.AbsoluteLayout());
jLabel1.setIcon(new javax.swing.ImageIcon(getClass().getResource("/Source/Icons/Logout_35px.png"))); // NOI18N
jPanel3.add(jLabel1, new org.netbeans.lib.awtextra.AbsoluteConstraints(25, 5, 40, 40));
jLabel2.setFont(new java.awt.Font("Segoe UI", 1, 18)); // NOI18N
jLabel2.setForeground(new java.awt.Color(255, 255, 255));
jLabel2.setText("Logout");
jLabel2.setHorizontalTextPosition(javax.swing.SwingConstants.CENTER);
jPanel3.add(jLabel2, new org.netbeans.lib.awtextra.AbsoluteConstraints(75, 12, -1, -1));
jPanel1.add(jPanel3, new org.netbeans.lib.awtextra.AbsoluteConstraints(0, 300, 200, 50));
jPanel4.setBackground(new java.awt.Color(34, 40, 49));
jPanel4.setCursor(new java.awt.Cursor(java.awt.Cursor.HAND_CURSOR));
jPanel4.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseEntered(java.awt.event.MouseEvent evt) {
jPanel4MouseEntered(evt);
}
});
jPanel4.setLayout(new org.netbeans.lib.awtextra.AbsoluteLayout());
jLabel3.setIcon(new javax.swing.ImageIcon(getClass().getResource("/Source/Icons/home_50px.png"))); // NOI18N
jPanel4.add(jLabel3, new org.netbeans.lib.awtextra.AbsoluteConstraints(25, 5, 40, 40));
jLabel4.setFont(new java.awt.Font("Segoe UI", 1, 18)); // NOI18N
jLabel4.setForeground(new java.awt.Color(255, 255, 255));
jLabel4.setText("Home");
jLabel4.setHorizontalTextPosition(javax.swing.SwingConstants.CENTER);
jPanel4.add(jLabel4, new org.netbeans.lib.awtextra.AbsoluteConstraints(75, 12, -1, -1));
jPanel1.add(jPanel4, new org.netbeans.lib.awtextra.AbsoluteConstraints(0, 150, 200, 50));
jPanel5.setBackground(new java.awt.Color(34, 40, 49));
jPanel5.setCursor(new java.awt.Cursor(java.awt.Cursor.HAND_CURSOR));
jPanel5.setLayout(new org.netbeans.lib.awtextra.AbsoluteLayout());
jLabel5.setIcon(new javax.swing.ImageIcon(getClass().getResource("/Source/Icons/identification_documents_40px.png"))); // NOI18N
jPanel5.add(jLabel5, new org.netbeans.lib.awtextra.AbsoluteConstraints(25, 5, 40, 40));
jLabel6.setFont(new java.awt.Font("Segoe UI", 1, 18)); // NOI18N
jLabel6.setForeground(new java.awt.Color(255, 255, 255));
jLabel6.setText("Students");
jLabel6.setHorizontalTextPosition(javax.swing.SwingConstants.CENTER);
jPanel5.add(jLabel6, new org.netbeans.lib.awtextra.AbsoluteConstraints(75, 12, -1, -1));
jLabel6.getAccessibleContext().setAccessibleName("75");
jPanel1.add(jPanel5, new org.netbeans.lib.awtextra.AbsoluteConstraints(0, 200, 200, 50));
jPanel6.setBackground(new java.awt.Color(34, 40, 49));
jPanel6.setCursor(new java.awt.Cursor(java.awt.Cursor.HAND_CURSOR));
jPanel6.setLayout(new org.netbeans.lib.awtextra.AbsoluteLayout());
jLabel7.setIcon(new javax.swing.ImageIcon(getClass().getResource("/Source/Icons/planner_40px.png"))); // NOI18N
jPanel6.add(jLabel7, new org.netbeans.lib.awtextra.AbsoluteConstraints(25, 5, 40, 40));
jLabel8.setFont(new java.awt.Font("Segoe UI", 1, 18)); // NOI18N
jLabel8.setForeground(new java.awt.Color(255, 255, 255));
jLabel8.setText("Attendance");
jLabel8.setHorizontalTextPosition(javax.swing.SwingConstants.CENTER);
jPanel6.add(jLabel8, new org.netbeans.lib.awtextra.AbsoluteConstraints(75, 12, -1, -1));
jPanel1.add(jPanel6, new org.netbeans.lib.awtextra.AbsoluteConstraints(0, 250, 200, 50));
getContentPane().add(jPanel1, new org.netbeans.lib.awtextra.AbsoluteConstraints(0, 0, 200, 600));
jPanel2.setLayout(new org.netbeans.lib.awtextra.AbsoluteLayout());
getContentPane().add(jPanel2, new org.netbeans.lib.awtextra.AbsoluteConstraints(200, 0, 700, 600));
getAccessibleContext().setAccessibleParent(this);
pack();
setLocationRelativeTo(null);
}// </editor-fold>
private void jPanel4MouseEntered(java.awt.event.MouseEvent evt) {
// TODO add your handling code here:
}
/**
* @param args the command line arguments
*/
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(Window.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(Window.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(Window.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(Window.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
new Window().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JLabel jLabel1;
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.JPanel jPanel1;
private javax.swing.JPanel jPanel2;
private javax.swing.JPanel jPanel3;
private javax.swing.JPanel jPanel4;
private javax.swing.JPanel jPanel5;
private javax.swing.JPanel jPanel6;
// End of variables declaration
}
Does stack Trace state that Image Icon does not exist? I am new to coding. But the resource file does exist. I even tried to add it to another folder I get the same error. The only way I can skip this error is to remove all the icons from the design. PS. The code is auto-generated by Netbeans. So I can't edit after //editorial-flow
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at java.desktop/javax.swing.ImageIcon.<init>(ImageIcon.java:217)
at Source.Window.initComponents(Window.java:61)
at Source.Window.<init>(Window.java:18)
at Source.Window$2.run(Window.java:172)
at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:770)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:715)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:740)
at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
Sources
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Source: Stack Overflow
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