Notes

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

public class routineMaintenance {
private JFrame frame;
private JLabel topic;
private JPanel checkboxes;
private JLabel checking;

public routineMaintenance() {
prepareGUI();

}

public static void main(String[] args) {
routineMaintenance box= new routineMaintenance();
box.showlist();
}



private void prepareGUI() {
frame=new JFrame();
frame.setSize(400,400);
frame.setLayout(new GridLayout(7,1));
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent windowEvent){
System.exit(0);
}
});

topic=new JLabel();

checking=new JLabel("",JLabel.CENTER);
checking.setSize(350,100);

checkboxes= new JPanel();
checkboxes.setLayout(new FlowLayout());

frame.add(topic);
frame.add(checkboxes);
frame.add(checking);
frame.setVisible(true);

}

private void showlist() {
topic.setText("list of maintenance");

final JCheckBox chkoil= new JCheckBox("oil change");
final JCheckBox chklube= new JCheckBox("Lube Job");
final JCheckBox chkradiator= new JCheckBox("Radiator Flush");
final JCheckBox chktransmission= new JCheckBox("Transmission flush");
final JCheckBox chkinspection= new JCheckBox("Inspection");
final JCheckBox chkmuffler= new JCheckBox("muffler replacement");
final JCheckBox chktire= new JCheckBox("tire rotation");

chkoil.addItemListener(new ItemListener() {
public void itemStateChanged(ItemEvent e) {
checking.setText("oil change checkbox:" +(e.getStateChange()==1?"checked":"unchecked"));
}
});

chkoil.addItemListener(new ItemListener() {
public void itemStateChanged(ItemEvent e) {
checking.setText("Lube Job:" +(e.getStateChange()==1?"checked":"unchecked"));
}
});



checkboxes.add(chkoil);
checkboxes.add(chkoil);
frame.setVisible(true);

}

}