Java 일반 텍스트 필드

JButton jb_clear = new JButton("Clear");

package codes;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Codes implements ActionListener {
  private final int size = 8;
  private int sindex = 0;

  JFrame jrf = new JFrame("Student Registration Form");
  JMenuBar jmb = new JMenuBar();

  JMenuItem jmi_new = new JMenuItem("New");
  JMenuItem jmi_set = new JMenuItem("Setting");

  JLabel jlfname = new JLabel("Email        ");
  JLabel jlname = new JLabel("First Name    ");
  JLabel jlpass = new JLabel("Password      ");

  JTextField jtname = new JTextField(20);
  JTextField jtfname = new JTextField(20);
  JTextField[] jtempty = new JTextField[size];

  JPasswordField jp = new JPasswordField(20);

  JButton jb_sub = new JButton("Submit");
  JButton jb_clear = new JButton("Clear");
  JButton jb_view = new JButton("View All");

  Codes() {
    createForm();
  }

  public void emptyTextField() {
    for (int i = 0; i < size; i++) {
      jtempty[i] = new JTextField(25);
      jtempty[i].setEditable(false);
      jtempty[i].setBorder(null);
      jtempty[i].setBackground(Color.ORANGE);
    }
  }
  public void createForm() {
    emptyTextField();
    jrf.setJMenuBar(jmb);
    jrf.add(jlname);
    jrf.add(jtname);
    jrf.add(jtempty[0]);
    jrf.add(jlfname);
    jrf.add(jtfname);
    jrf.add(jtempty[1]);
    jrf.add(jlpass);
    jrf.add(jp);
    jrf.add(jtempty[2]);
    jtempty[7].setColumns(30);
    jrf.add(jtempty[7]);
    jrf.add(jtempty[3]);
    jrf.add(jtempty[4]);
    jrf.add(jtempty[5]);
    jrf.add(jtempty[6]);
    jrf.add(jb_sub);
    jrf.add(jb_clear);
    jrf.add(jb_view);
    jb_sub.addActionListener(this);
    jb_clear.addActionListener(this);
    jb_view.addActionListener(this);
    jrf.setLayout(new FlowLayout());
    jrf.setSize(350, 600);
    // setResizable allow to not extend the frame size
    jrf.setResizable(false);
    // jrf.setBounds(100,0,350,700);
    jrf.setVisible(true);
    jrf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    jrf.getContentPane().setBackground(Color.ORANGE);
  }
  @Override
  public void actionPerformed(ActionEvent e) {
    if (e.getSource().equals(jb_sub)) {
      // JOptionPane.showMessageDialog(null, "Do you want to Submit Application");
      submitData();
    } else if (e.getSource().equals(jb_clear)) {
      // JOptionPane.showMessageDialog(null,"It will remove Data","Student Regirstaion
      // Data",JOptionPane.WARNING_MESSAGE);
      clearForm();
    }
  }
  void clearForm() {
    jtname.setText("");
    jtfname.setText("");
    jp.setText("");
    ;
  }
  void submitData() {
    String name = jtname.getText();
    String fname = jtfname.getText();
    String pass = String.valueOf(jp.getPassword());

    clearForm();
    jrf.setVisible(false);
  }
  public static void main(String[] args) {
    Codes rf = new Codes();
  }
}