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import java.awt.Dimension;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
public class SimpleTest extends JFrame {
public SimpleTest() {
JPanel panel = new JPanel();
panel.setPreferredSize(new Dimension(800, 600));
this.getContentPane().add(new JScrollPane(panel));
}
public static void main(String[] args) {
SimpleTest st = new SimpleTest();
st.setVisible(true);
st.setSize(200, 100);
st.setDefaultCloseOperation(EXIT_ON_CLOSE);
}
}