lab10

lab/lab10/Question2/MyFrame.java

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+/*
+ * Author: CHEN Yongyuan (Walter) from OOP(1007)
+ * Date: 2022-05-01
+ * Description: This is the Main Frame class.
+ */
+
+import javax.swing.JFrame;
+import java.awt.FlowLayout;
+import javax.swing.JButton;
+
+public class MyFrame extends JFrame {
+	// add two buttons with different text
+	private JButton button1 = new JButton("Button 1");
+	private JButton button2 = new JButton("Button 2");
+
+	public MyFrame() {
+		setSize(400, 300);
+		setTitle("MyFrame");
+		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		setLocationRelativeTo(null);
+
+		// set the layout of the frame
+		setLayout(new FlowLayout(FlowLayout.LEFT, 20, 40));
+
+		// add the buttons to the frame
+		add(button1);
+		add(button2);
+
+		setVisible(true);
+	}
+}

lab/lab10/Question2/Start.java

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+/**
+ * Answer to question.
+ *
+ * -Q: Instead of adding to the frame two different buttons, add twice the same
+ * button object. Run the program. What happens?
+ *
+ * -A: Only one button is added to the frame.
+ *
+ */
+public class Start {
+	public static void main(String[] args) {
+		// Dispather
+		javax.swing.SwingUtilities.invokeLater(new Runnable() {
+			@Override
+			public void run() {
+				new MyFrame();
+			}
+		});
+	}
+}