import java.awt.*;
import java.awt.event.*;
import java.util.*;
class RadioButton01 extends Frame{
public static void main(String[] args){
new RadioButton01();
}//end main
RadioButton01(){//constructor
//Create a CheckboxGroup object
CheckboxGroup myCheckboxGroup = new CheckboxGroup();
setLayout(new FlowLayout());
add(new Checkbox("A",true, myCheckboxGroup));
add(new Checkbox("B",false,myCheckboxGroup));
add(new Checkbox("C",false,myCheckboxGroup));
setSize(250,100);
setTitle("Radio Buttons");
setVisible(true);
// Inner class to terminate program.
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);}});//end WindowListener
}//end constructor
}//end class RadioButton01 definition
Output: -
C:\java\awt>javac RadioButton01.java
C:\java\awt>java RadioButton01
5. Text Area: This is the text container component of Java AWT package. The Text Area contains plain text.
import java.awt.*;
import java.awt.event.*;
public class AwtControlDemo {
private Frame mainFrame;
private Label headerLabel;
private Label statusLabel;
private Panel controlPanel;
public AwtControlDemo(){
prepareGUI();
}
public static void main(String[] args){
AwtControlDemo awtControlDemo = new AwtControlDemo();
awtControlDemo.showTextAreaDemo();
}
private void prepareGUI(){
mainFrame = new Frame("Java AWT Examples");
mainFrame.setSize(400,400);
mainFrame.setLayout(new GridLayout(3, 1));
mainFrame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent windowEvent){
System.exit(0);
}
});
headerLabel = new Label();
headerLabel.setAlignment(Label.CENTER);
statusLabel = new Label();
statusLabel.setAlignment(Label.CENTER);
statusLabel.setSize(350,100);
controlPanel = new Panel();
controlPanel.setLayout(new FlowLayout());
mainFrame.add(headerLabel);
mainFrame.add(controlPanel);
mainFrame.add(statusLabel);
mainFrame.setVisible(true);
}
private void showTextAreaDemo(){
headerLabel.setText("Control in action: TextArea");
Label commentlabel= new Label("Comments: ", Label.RIGHT);
final TextArea commentTextArea = new TextArea("This is a AWT tutorial "
+"to make GUI application in Java.",5,30);
Button showButton = new Button("Show");
showButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
statusLabel.setText( commentTextArea.getText());
}
});
controlPanel.add(commentlabel);
controlPanel.add(commentTextArea);
controlPanel.add(showButton);
mainFrame.setVisible(true);
}
}
Output: -
C:\java\awt>javac AwtControlDemo.java
C:\java\awt>java AwtControlDemo
6. Text Field: This is also the text container component of Java AWT package. This component contains single line and limited text information.
Example: -
import java.awt.*;
import java.awt.event.*;
public class AwtControlDemo {
private Frame mainFrame;
private Label headerLabel;
private Label statusLabel;
private Panel controlPanel;
public AwtControlDemo(){
prepareGUI();
}
public static void main(String[] args){
AwtControlDemo awtControlDemo = new AwtControlDemo();
awtControlDemo.showTextFieldDemo();
}
private void prepareGUI(){
mainFrame = new Frame("Java AWT Examples");
mainFrame.setSize(400,400);
mainFrame.setLayout(new GridLayout(3, 1));
mainFrame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent windowEvent){
System.exit(0);
}
});
headerLabel = new Label();
headerLabel.setAlignment(Label.CENTER);
statusLabel = new Label();
statusLabel.setAlignment(Label.CENTER);
statusLabel.setSize(350,100);
controlPanel = new Panel();
controlPanel.setLayout(new FlowLayout());
mainFrame.add(headerLabel);
mainFrame.add(controlPanel);
mainFrame.add(statusLabel);
mainFrame.setVisible(true);
}
private void showTextFieldDemo(){
headerLabel.setText("Control in action: TextField");
Label namelabel= new Label("User ID: ", Label.RIGHT);
Label passwordLabel = new Label("Password: ", Label.CENTER);
final TextField userText = new TextField(6);
final TextField passwordText = new TextField(6);
passwordText.setEchoChar('*');
Button loginButton = new Button("Login");
loginButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
String data = "Username: " + userText.getText();
data += ", Password: " + passwordText.getText();
statusLabel.setText(data);
}
});
controlPanel.add(namelabel);
controlPanel.add(userText);
controlPanel.add(passwordLabel);
controlPanel.add(passwordText);
controlPanel.add(loginButton);
mainFrame.setVisible(true);
}
}
Output: - C:\java\awt>javac AwtControlDemo.java
C:\java\awt>java AwtControlDemo
