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  1. package test;
  2.  
  3. import java.awt.BorderLayout;
  4. import java.awt.Dimension;
  5. import java.awt.EventQueue;
  6. import java.awt.Graphics;
  7. import java.awt.Toolkit;
  8.  
  9. import javax.swing.*;
  10. import javax.swing.event.ChangeEvent;
  11. import javax.swing.event.ChangeListener;
  12.  
  13. public class Kreski3 extends JFrame {
  14. MojKomponent komponent;
  15. int n = 11;
  16. public class MojKomponent extends JComponent{
  17.  
  18. @Override
  19. protected void paintComponent(Graphics g) {
  20.  
  21. int w = getWidth();
  22. int h = getHeight();
  23.  
  24. g.drawRect(w/4, h/4, w/2, h/2);
  25.  
  26. g.drawLine(arg0, arg1, arg2, arg3);
  27.  
  28. super.paintComponent(g);
  29. }
  30.  
  31. }
  32.  
  33. public Kreski3(String string) {
  34. super(string);
  35. setDefaultCloseOperation(EXIT_ON_CLOSE);
  36. Toolkit kit = Toolkit.getDefaultToolkit();
  37. Dimension d = kit.getScreenSize();
  38. setBounds(d.width/4, d.height/4, d.width/2, d.height/2);
  39. add(komponent = new MojKomponent());
  40.  
  41. final JSlider slider = new JSlider(1,50,n);
  42. add(slider, BorderLayout.SOUTH);
  43.  
  44. slider.addChangeListener(new ChangeListener() {
  45. @Override
  46. public void stateChanged(ChangeEvent e) {
  47. n = slider.getValue();
  48. komponent.repaint();
  49.  
  50. }
  51. });
  52.  
  53. setVisible(true);
  54. }
  55.  
  56. public static void main(String[] args) {
  57. EventQueue.invokeLater(new Runnable() {
  58. @Override
  59. public void run() {
  60. new Kreski3("Kreski");
  61. }
  62. });
  63. }
  64.  
  65. }
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