The main difference between JTextField and JTextArea in Java is that a JTextField allows entering a single line of text in a GUI application while the JTextArea allows entering multiple lines of text in a GUI application.
import javax.swing.*; import java.awt.*; public class JTextFieldTest { public static void main(String[] args) { final JFrame frame = new JFrame("JTextField Demo"); JLabel lblFirstName = new JLabel("First Name:"); JTextField tfFirstName = new JTextField(20); lblFirstName.setLabelFor(tfFirstName); JLabel lblLastName = new JLabel("Last Name:"); JTextField tfLastName = new JTextField(20); lblLastName.setLabelFor(tfLastName); JPanel panel = new JPanel(); panel.setLayout(new FlowLayout()); panel.add(lblFirstName); panel.add(tfFirstName); panel.add(lblLastName); panel.add(tfLastName); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setSize(300, 100); frame.getContentPane().add(panel, BorderLayout.CENTER); frame.setVisible(true); } }
import java.awt.*; import javax.swing.*; import javax.swing.event.*; public class JTextAreaTest { public static void main(String args[]) { JFrame frame = new JFrame("JTextArea Example"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JTextArea textArea = new JTextArea(); JScrollPane scrollPane = new JScrollPane(textArea); frame.add(scrollPane, BorderLayout.CENTER); CaretListener listener = new CaretListener() { public void caretUpdate(CaretEvent caretEvent) { System.out.println("Dot: "+ caretEvent.getDot()); System.out.println("Mark: "+caretEvent.getMark()); } }; textArea.addCaretListener(listener); frame.setSize(250, 150); frame.setVisible(true); } }