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copied!<p>IMO, you have to add your own JPanel into ContentPane of JFrame.</p> <p>Besides, use SwingUtilities to show GUI.</p> <pre><code> public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { public void run() { JFrame f = new JFrame(); NewJPanel n1 = new NewJPanel(); f.getContentPane().add(n1, BorderLayout.CENTER); f.pack(); f.show(); } }); } </code></pre> <p>Class NewJPanel code.</p> <pre><code>class NewJPanel extends javax.swing.JPanel { /** Creates new form NewJPanel */ public NewJPanel() { //pag kinoment ko ito, tsaka lang lamalabas yung jlabel. 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() { jLabel1 = new javax.swing.JLabel(); jLabel1.setText("jLabel1"); JLabel n = new JLabel(); n.setText("asdasdasd"); javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this); this.setLayout(layout); layout.setHorizontalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addGap(175, 175, 175) .addComponent(jLabel1) .addComponent(n) .addContainerGap(191, Short.MAX_VALUE)) ); layout.setVerticalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addGap(127, 127, 127) .addComponent(jLabel1) .addComponent(n) .addContainerGap(159, Short.MAX_VALUE)) ); }// </editor-fold> // Variables declaration - do not modify private javax.swing.JLabel jLabel1; // End of variables declaration } </code></pre>

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