Thread: JAVA GUI and FILE TEXT

Hello,I have a problem,I need to use JFrame ,and JTextField for name,age and other,and i must to catch that information from JTextField and save in txt.file and on the call button that information from JTextField who save on txt file to show.
Please help me.

I have jFramem with someone Textfield who need to be cheked,and that information whick you entered in JTextfield,need to save on someone txt.file when you press button,when you press other button need to show that information whick you entered in JTF.I need y to pick up Jtextfield,save on txt.file and show that.


port java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Frame;
import java.awt.GridLayout;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import static javax.swing.JFrame.EXIT_ON_CLOSE;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;


public class Projektni extends JFrame {
public Projektni()
{
JPanel panel=new JPanel (new GridLayout(6, 7));



panel.add(new JLabel("Ime studenta:"));
panel.add(new JTextField(10));
panel.add(new JLabel("Prezime studenta:"));
panel.add(new JTextField(15));
panel.add(new JLabel("Broj indeksa studenta:"));
panel.add(new JTextField(5));

String[] seminari = {"Microsoft","MAC","Java"};
JComboBox cek = new JComboBox(seminari);
panel.add(cek);
panel.add(new JButton("Upisi"));
panel.add(new JButton("Prikazi"));
add(panel,BorderLayout.CENTER);
}

public static void main(String[] args) {
JFrame frame = new Projektni();
frame.setSize(500, 500);
frame.setLocationRelativeTo(null);
frame.setTitle("Seminari");
frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
frame.pack();
frame.setVisible(true);

}


}

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