Analyze the following code.
import java.awt.*;
import javax.swing.*;
public class Test {
public static void main(String[] args) {
Component c = new JButton("OK");
JFrame frame = new JFrame("My Frame");
frame.add(c);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}
B. You can only add c to a container because c's type is Component.
C. You cannot add a Swing component directly to a JFrame using add(c) prior to JDK 1.4, but it is OK in JDK 1.5.
D. You cannot create a JFrame using new JFrame("My Frame").
The correct answer is C
Java
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