Java Programming

} else { List li = (List) source; String selected = li.getSelectedItem(); lab.setText(selected); } } } Program execution results: Figure 4.17 ListDemo Exercise 5: Build a Dialog container class to display messages like the MessageBox function on Windows. import java.awt.*; import java.awt.event.*; ...

Constraints.gridx = 2; constraints.gridy = 5; constraints.gridheight = 1; constraints.gridwidth = 1; constraints.weightx = 2.0; layout.setConstraints(buttons[7], constraints); // Set the step for the 9th button constraints.gridx = 3; constraints.gridy = 6; constraints.gridheight = 1; ...