data entered will not be lost in any case if someone accidentally clicked Next button

Question

I want To Pass the copy of whole object to a new Jframe and when i return back from that new Jframe i have my previous session values as it is in my text boxes previously. I mean my data entered will not be lost in any case if someone accidentally clicked Next button.

Here Is my Frame1 Code

import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.border.EmptyBorder;

public class Myframe1 extends JFrame {

    private JPanel contentPane;
    public JTextField tb1;
    public JTextField tb2;
    public JTextField tb3;
    public JTextField tb4;
    public JTextField tb5;
    JLabel lblName = new JLabel("name");
    JLabel lblRoll = new JLabel("Roll");
    JLabel lblClass = new JLabel("Class");
    JLabel lblSection = new JLabel("Section");
    JLabel lblMarks = new JLabel("Marks");
    JButton btnNext = new JButton("Next");
    static Myframe1 mf1=null;
    static Myframe2 mf2=null;


    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    Myframe1 frame = new Myframe1();
                    frame.setTitle("Frame 1");
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the frame.
     */
    public void action(){
        mf1=this;
        System.out.println("name-- "+mf1.tb1.getText());
        new Myframe2().show();
        this.dispose();
    }

    public void hodData(){
//      if(mf1==null){
//          mf1=Myframe2.holdData;
//      }
    }
    public Myframe1() {
        hodData();
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(100, 100, 275, 300);
        contentPane = new JPanel();
        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
        setContentPane(contentPane);
        contentPane.setLayout(null);

        tb1 = new JTextField("Name");
        tb1.setBounds(119, 22, 114, 19);
        contentPane.add(tb1);
        tb1.setColumns(10);

        tb2 = new JTextField("Roll");
        tb2.setColumns(10);
        tb2.setBounds(119, 53, 114, 19);
        contentPane.add(tb2);

        tb3 = new JTextField("Class 43");
        tb3.setColumns(10);
        tb3.setBounds(119, 84, 114, 19);
        contentPane.add(tb3);

        tb4 = new JTextField("Section");
        tb4.setColumns(10);
        tb4.setBounds(119, 115, 114, 19);
        contentPane.add(tb4);

        tb5 = new JTextField("Marks");
        tb5.setColumns(10);
        tb5.setBounds(119, 146, 114, 19);
        contentPane.add(tb5);

        lblName.setBounds(31, 24, 70, 15);
        contentPane.add(lblName);

        lblRoll.setBounds(31, 55, 70, 15);
        contentPane.add(lblRoll);

        lblClass.setBounds(31, 86, 70, 15);
        contentPane.add(lblClass);

        lblSection.setBounds(31, 117, 70, 15);
        contentPane.add(lblSection);

        lblMarks.setBounds(31, 148, 70, 15);
        contentPane.add(lblMarks);
        btnNext.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                action();

            }
        });

        btnNext.setBounds(31, 177, 202, 25);
        contentPane.add(btnNext);

    }
}

Here Is my Frame2 Code

    import java.awt.EventQueue;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    import java.awt.event.MouseAdapter;
    import java.awt.event.MouseEvent;
    import javax.swing.JButton;
    import javax.swing.JFrame;
    import javax.swing.JLabel;
    import javax.swing.JPanel;
    import javax.swing.JTextField;
    import javax.swing.border.EmptyBorder;

    public class Myframe2 extends JFrame {

        /**
         * 
         */
        private static final long serialVersionUID = 1L;
        private JPanel contentPane;
        public JTextField tb1;
        public JTextField tb2;
        public JTextField tb3;
        public JTextField tb4;
        public JTextField tb5;
        JLabel lblName = new JLabel("name --");
        JLabel lblRoll = new JLabel("Roll --");
        JLabel lblClass = new JLabel("Class --");
        JLabel lblSection = new JLabel("Section --");
        JLabel lblMarks = new JLabel("Marks --");
        JButton btnGet = new JButton("Get Data ");
        static Myframe2 mf2=null;
        Myframe1 mf1=new Myframe1();
        static Myframe1 holdData=Myframe1.mf1;


        /**
         * Launch the application.
         */
        public static void main(String[] args) {
            EventQueue.invokeLater(new Runnable() {
                public void run() {
                    try {
                        Myframe2 frame = new Myframe2();
                        frame.setTitle("Frame 2");
                        frame.setVisible(true);
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
            });
        }

        /**
         * Create the frame.
         */
        public void action(){
            System.out.println("name-- "+Myframe1.mf1.tb1.getText());
            tb1.setText(Myframe1.mf1.tb1.getText());
            tb2.setText(Myframe1.mf1.tb2.getText());
            tb3.setText(Myframe1.mf1.tb3.getText());
            tb4.setText(Myframe1.mf1.tb4.getText());
            tb5.setText(Myframe1.mf1.tb5.getText());
            mf2=this;
            btnGet.addMouseListener(new MouseAdapter() {
                @Override
                public void mouseClicked(MouseEvent e) {
                     if(e.getClickCount()==2){
                         dispo();
                        }
                }
            });

        }
        public void dispo(){
            this.hide();
            mf1.show();
        }

        public Myframe2() {

            setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            setBounds(100, 100, 275, 300);
            contentPane = new JPanel();
            contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
            setContentPane(contentPane);
            contentPane.setLayout(null);

            tb1 = new JTextField();
            tb1.setBounds(119, 22, 114, 19);
            contentPane.add(tb1);
            tb1.setColumns(10);

            tb2 = new JTextField();
            tb2.setColumns(10);
            tb2.setBounds(119, 53, 114, 19);
            contentPane.add(tb2);

            tb3 = new JTextField();
            tb3.setColumns(10);
            tb3.setBounds(119, 84, 114, 19);
            contentPane.add(tb3);

            tb4 = new JTextField();
            tb4.setColumns(10);
            tb4.setBounds(119, 115, 114, 19);
            contentPane.add(tb4);

            tb5 = new JTextField();
            tb5.setColumns(10);
            tb5.setBounds(119, 146, 114, 19);
            contentPane.add(tb5);

            lblName.setBounds(31, 24, 70, 15);
            contentPane.add(lblName);

            lblRoll.setBounds(31, 55, 70, 15);
            contentPane.add(lblRoll);

            lblClass.setBounds(31, 86, 70, 15);
            contentPane.add(lblClass);

            lblSection.setBounds(31, 117, 70, 15);
            contentPane.add(lblSection);

            lblMarks.setBounds(31, 148, 70, 15);
            contentPane.add(lblMarks);
            btnGet.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    action();
                }
            });

            btnGet.setBounds(31, 177, 202, 25);
            contentPane.add(btnGet);

        }
    }

You might like to have a look at [Model-View-Controller](http://en.wikipedia.org/wiki/Model%E2%80%93view%E2%80%93controller) and [How to Make Dialogs](http://docs.oracle.com/javase/tutorial/uiswing/components/dialog.html). In this case `static` is not going to help you — MadProgrammer, Mar 18 '16 at 07:49
See [The Use of Multiple JFrames, Good/Bad Practice?](http://stackoverflow.com/q/9554636/418556) — Andrew Thompson, Mar 18 '16 at 10:59

score 0 · Answer 1 · answered Mar 18 '16 at 10:19

I agree with @MadProgrammer, you have to study a bit the MVC and How to make dialogs and static modifier is not the solution.

A hint: you have to pass the values from MyFrame1 to MyFrame2. You can reach this for example when you are constructing a new instance of MyFrame2. You can pass the complete data in an ad-hoc bean or referencing the instance of MyFrame1.

The second option can be achived with this modifications in your code

MyFrame1.java

/**
 * Create the frame.
 */
public void action(){
    mf1=this;
    System.out.println("name-- "+mf1.tb1.getText());

    JFrame jf2 = new Myframe2(this);
    jf2.setVisible(true);
    this.dispose();
}

MyFrame2.java

private Myframe1 mf1; // non-static!
...
...
/**
 * Create the frame.
 */
public void action(){
    System.out.println("name-- "+ mf1.tb1.getText());
    tb1.setText(mf1.tb1.getText());
    tb2.setText(mf1.tb2.getText());
    tb3.setText(mf1.tb3.getText());
    tb4.setText(mf1.tb4.getText());
    tb5.setText(mf1.tb5.getText());
    mf2=this;
    btnGet.addMouseListener(new MouseAdapter() {
        @Override
        public void mouseClicked(MouseEvent e) {
             if(e.getClickCount()==2){
                 dispo();
                }
        }
    });

}
...
public Myframe2(Myframe1 mf1) {
    this.mf1 = mf1;
    // Rest of your code here
}

I think that this solves your problem but you have a lot to learn about navigation between frames, the MVC, etc ...

data entered will not be lost in any case if someone accidentally clicked Next button

Here Is my Frame1 Code

Here Is my Frame2 Code

1 Answers1