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import java.awt.*;
import org.jopas.*;

public class Example6 extends Frame {

JopasLabel plot;
Jopas jopas;
TextField aleatorio;

    public Example6() {
        jopas = new Jopas ();
        aleatorio= new TextField();
        aleatorio.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
            aleatorioActionPerformed(evt);
            }
                });
        addWindowListener( new java.awt.event.WindowAdapter()           {
            public void windowClosing(java.awt.event.WindowEvent evt) {
            System.exit(0);
            }
        });
        plot = new JopasLabel(jopas);
        add( "South",aleatorio );
        add( "Center",plot );
        jopas.Execute("y=rand(1,20)");
        plot.paintLabel("y","Example 6","Samples","Value");
        pack();
                setSize(300,300);
                setVisible(true);     
        }
     
    private void aleatorioActionPerformed(java.awt.event.ActionEvent evt) {
        Matrix L = new Matrix(Double.parseDouble(aleatorio.getText()), "L");
        jopas.Load(L);
        jopas.Execute("y=rand(1,L)");
        plot.paintLabel("y","Example 6","Samples","Value");
        }

    public static void main( String args[] ) {
        Example6 example6 = new Example6();      
        }