import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
public class Arrays extends JFrame implements ActionListener {

    private JPanel steuerung;

    public Arrays() {
        super("Arrays");
        setBounds(0,25,200,600); //setBounds(0,25,560,700);
        init();
    }
    private JTextField[] field = new JTextField[50];
    private JLabel[] label = new JLabel[50];
    public void create() {
        int result = 0;
        for(int i=0;i<50;i++) {
            label[i] = new JLabel(""+i+"");
            field[i] = new JTextField();
            steuerung.add(label[i]);
            steuerung.add(field[i]);
            result = i*i;
            label[i].setText(""+i+"");
            field[i].setText(""+result+"");
        }
    }
    public void init() {
        steuerung = new JPanel();
        getContentPane().add("West", steuerung);
        steuerung.setLayout(new GridLayout(25,3));
        create();
        setVisible(true);
    }
    public void tauschen(int index1, int index2) {
        int hold = 0;
        hold = Integer.parseInt(field[index1].getText());
        field[index1].setText(field[index2].getText());
        field[index2].setText(""+hold+"");
    }
     public void actionPerformed(ActionEvent e) {
        Object button = e.getSource();

    }
}