JFrame f = new JFrame();
f.addWindowListener(new BasicWindowMonitor());
// Create several fields using different constructors
JTextField t1 = new JTextField();
JTextField t2 = new JTextField(11);
JTextField t3 = new JTextField("mmmmmmmmmmm");
JTextField t4 = new JTextField("Hello World");
JTextField t5 = new JTextField("Hello World", 11);
JTextField t6 = new JTextField("Hello World");
JTextField t7 = new JTextField(2);
JTextField t8 = new JTextField();
// Validate the container when we hit 'enter' in t4.
final JTextField ref = t4;
ref.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ev) {
ref.getParent().validate();
ref.setScrollOffset(0);
}
});
// Make sure t6 won't grow on us (like t4 will)
t6.setPreferredSize(t6.getPreferredSize());
// Use a fixed-width font on t7-2 characters wide . . . not!
t7.setFont(new Font("Monospaced", Font.PLAIN, 12));
// A little trick to make t8 _really_ 2 characters wide
t8.setText(" "); // 2 characters . . .
t8.setFont(new Font("Monospaced", Font.PLAIN, 12));
t8.setPreferredSize(t8.getPreferredSize());
t8.setText(""); // empty the field
// Shift all the fields with content back to the left
t3.setScrollOffset(0);
t4.setScrollOffset(0);
t5.setScrollOffset(0);
t6.setScrollOffset(0);
// Display all the fields . . .
Container content = f.getContentPane();
content.setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridy = 0;
content.add(t1, gbc); gbc.gridy++;
content.add(t2, gbc); gbc.gridy++;
content.add(t3, gbc); gbc.gridy++;
content.add(t4, gbc); gbc.gridy++;
content.add(t5, gbc); gbc.gridy++;
content.add(t6, gbc); gbc.gridy++;
content.add(t7, gbc); gbc.gridy++;
content.add(t8, gbc);
f.setSize(150, 200);
f.setVisible(true);
