將對象傳遞給java中的另一個類

Question

我有我的主類讓我們稱之為MainGUI它包含以下內容

 private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) { 
UserUI aGui = new UserUI(user);
}

用戶對象有用戶名和密碼我需要將它傳遞給UserUI並在textArea中顯示用戶名和密碼到目前為止我沒有得到任何東西出現在我的UserUI文本區域，UserUI類看起來像這樣：

package Details;

public class UserUI extends javax.swing.JFrame {

 User user;

    public UserUI() {
        initComponents();

    }


    public void setUser(User user){

        if(user.getName().equals("Bob")){
            jTextArea1.setText(user.getName());
        }
    }

  UserUI(User user) {
       // throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
   }
  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(UserUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(UserUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(UserUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(UserUI.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 UserUI().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JButton jButton1;
    private javax.swing.JComboBox jComboBox1;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTextArea jTextArea1;
    // End of variables declaration                   
}

Answer 1

在UserUI(User user)調用this()

UserUI(User user) {
    this();
    this.user = user;
    setUser(user);
}