Controls

Swing Controls Swing provides a set of controls (also known as components) to create interactive user interfaces. These controls are part of the javax.swing package and can be easily added to containers like JPanel and JFrame. Common Swing Controls Control Description JButton Button that triggers an action when clicked. JLabel Displays a short string or an image. JTextField A single-line text input field. JTextArea A multi-line text input field. JCheckBox A checkbox for binary choices (checked/unchecked). JRadioButton A radio button for selecting one option from a group. JComboBox A dropdown menu for selecting from a list of items. JList A list that allows selecting one or more items. Example: Using JButton and JLabel JFrame frame = new JFrame("Swing Controls"); JButton button = new JButton("Click Me"); JLabel label = new JLabel("Hello, World!"); button.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { label.setText("Button Clicked!"); } }); frame.add(button, BorderLayout.NORTH); frame.add(label, BorderLayout.CENTER); frame.setSize(300, 200); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setVisible(true); Example: JCheckBox JCheckBox checkBox = new JCheckBox("Agree to terms"); checkBox.addItemListener(new ItemListener() { public void itemStateChanged(ItemEvent e) { if (e.getStateChange() == ItemEvent.SELECTED) { System.out.println("Checked"); } else { System.out.println("Unchecked"); } } }); Example: JComboBox String[] items = { "Java", "Python", "C++", "JavaScript" }; JComboBox<String> comboBox = new JComboBox<>(items); comboBox.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { String selectedItem = (String) comboBox.getSelectedItem(); System.out.println("Selected: " + selectedItem); } }); 🔗 Related Notes Swing Event Handling Event Listeners Swing