Calling variables using arryes to change in JLabel after an action

Question

hi guys, i'm having small problems in calling variables and changing the variables after the user hit the change button. i'm new here trying to learn Jave , hope you can help.

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.*;


public class NestedPanelsTwo {

    private JPanel primaryPanel, subPanel1, subPanel2; 
    private JLabel label; 
    private JButton button; 
    private JFrame frmWindows;
    private int i,i2;
    private String [] x={" Panel One"," Panel Two"};
    private String[] y ={" On left"," On Right"};
    private int[] loction = {SwingConstants.LEFT,SwingConstants.RIGHT};

    public NestedPanelsTwo(){
        primaryPanel= new JPanel(new GridLayout(1,2));
        subPanel1 = new JPanel(new FlowLayout());
        subPanel2 = new JPanel(new FlowLayout());
        ImageIcon icon = new ImageIcon("bluej-84-toned.JPG");
        subPanel1.setPreferredSize(new Dimension(400,200));
        subPanel1.setBackground(Color.green);
        button = new JButton("Change one");
        i=0;
        label = new JLabel(x[i] + " "+ y[i] , icon , loction[i]);

        label.setHorizontalTextPosition(loction[i]);
        button.addActionListener(new ClickEvent(label));
        subPanel1.add(label);
        subPanel1.add(button);
        primaryPanel.add(subPanel1);

        frmWindows = new JFrame("Panels");
        frmWindows.getContentPane().add(primaryPanel);
        frmWindows.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frmWindows.setVisible(true);
        frmWindows.pack();

        subPanel2 = new JPanel(new FlowLayout());
        subPanel2.setPreferredSize(new Dimension(300,100));
        subPanel2.setBackground(Color.blue);
        button = new JButton("Change Two");
        i2=1;
        label = new JLabel(x[i2] + " "+ y[i2] , icon , loction[i2]);
        label.setHorizontalTextPosition(loction[i2]);
        button.addActionListener(new ClickEvent(label));
        subPanel2.add(label);
        subPanel2.add(button);
        primaryPanel.add(subPanel2);


    }   
    private class ClickEvent implements ActionListener {

        private JLabel label;
          public ClickEvent(JLabel label)
          {

          this.label = label;
          this.i  = i;
          }

           public void actionPerformed(ActionEvent event)
           {
               i =(i+1)%2;
               label.setText(x[i]+ y[i]);
               label.setHorizontalTextPosition(loction[i]);
           }
    }
    public static void main(String[] args) {
        NestedPanelsTwo x = new NestedPanelsTwo();
    }
    }

the problem in changing x and y after the action thanks in advance