Java Swings/Swing Top Level Containers

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JFrame[edit]

Computer code JFrameEx.java
import javax.swing.JFrame;
import javax.swing.JLabel;
 
public class JFrameEx extends JFrame {
 
    JFrameEx() {
        JLabel label1 = new JLabel("My Label");
        add(label1);
        setVisible(true);
    }
 
    public static void main(String args[]) {
        JFrameEx e1 = new JFrameEx();
    }
}

JOptionPane[edit]

JApplet[edit]