Credits

Thursday, September 9, 2010

Integration of Common GUI Java Components

GUI components like buttons, labels, text fields, radio buttons, check boxes, scrollpane and others can be all put to use.

A program below illustrates the use of commonly used components with item and action events to respond to combo box selection and a button click.

[+/-] show/hide


/*adding of components to frame without a panel*/
import java.awt.FlowLayout;
import javax.swing.*;
import java.awt.event.*;
public class GUIStudInfoQuiz extends JFrame implements ActionListener{

JLabel nameLabel= new JLabel("Name",SwingConstants.LEFT);
JLabel courseLabel= new JLabel ("Course:",SwingConstants.LEFT);
JLabel addressLabel= new JLabel ("Address:",SwingConstants.LEFT);
JLabel genderLabel= new JLabel ("Gender:",SwingConstants.LEFT);
JLabel statusLabel= new JLabel ("Civil Status:",SwingConstants.LEFT);
JTextArea addressArea = new JTextArea (2,15);
JTextField nameField=new JTextField(15);
JTextField courseField = new JTextField(15);
String[] status = {"Single","Widow","Married"};
JComboBox statusBox = new JComboBox(status);
JTextField statusField = new JTextField(8);
JRadioButton female = new JRadioButton("Female");
JRadioButton male = new JRadioButton("Male");
ButtonGroup gender = new ButtonGroup();

JButton save = new JButton("Save");
JButton cancel = new JButton("Cancel");

public GUIStudInfoQuiz(){

setSize(250,250);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

FlowLayout flo=new FlowLayout();


setLayout(flo);
add(nameLabel);
add(nameField);
add(courseLabel);
add(courseField);
add(addressLabel);
add(addressArea);
add(genderLabel);
statusBox.addItemListener(new ItemListener(){
public void itemStateChanged(ItemEvent ie){
String str = (String)statusBox.getSelectedItem();
statusField.setText(str);
}
});
add(statusBox);
add(statusField);
add(statusLabel);

add(male);
add(female);
gender.add(male);
gender.add(female);

save.addActionListener(this);
cancel.addActionListener(this);

add(save);
add(cancel);

setVisible(true);
}

public void actionPerformed(ActionEvent evt) {

Object source = evt.getSource();
if (source==save)
JOptionPane.showMessageDialog(null,"File saved.");
else
System.exit(0);


}
public static void main (String args[]){
GUIStudInfoQuiz myFrame=new GUIStudInfoQuiz();
}
}

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