>>Creative Commons<< programing3-8

/*
Auther : Kohei Hasegawa
Licence : Creative Commons
*/
  import java.awt.*;
  import java.awt.event.*;
  import javax.swing.*;

  public class filename extends JPanel {
    static int[][] xp = new int[20][700];
    static int[][] yp = new int[20][700];
    static int[] kazu = new int[20];
    static int st = 0;
    static int stMax = 0;
    static String msg[]={"Pressed", " ", "Relesed\n"};
    static int  cnt= 0;

    public filename() {
      setOpaque(false);
      addMouseMotionListener(new MouseMotionAdapter() {
        public void mouseDragged(MouseEvent event) {
          kiroku(event, 1);
          repaint();
        }
      });

      addMouseListener(new MouseAdapter() {
        public void mouseReleased(MouseEvent event) {
          kiroku(event, 2);
          st++;
          cnt = 0;
          repaint();
        }

        public void mousePressed(MouseEvent event) {
          kiroku(event, 0);
          repaint();
        }
      });
    }

    public void kiroku(MouseEvent event, int id) {
      System.out.printf(" %5d: x=%5d, ", cnt, event.getX());
      System.out.printf("y=%5d %s\n", event.getY(), msg[id]);

      xp[st][cnt] = event.getX();
      yp[st][cnt] = event.getY();

      cnt++;
      if(cnt >= 700){ cnt = 0; }
      kazu[st] = cnt;
    }

    public void paintComponent(Graphics g) {
      for(int k=0; k<st; k++) {
          System.out.println(" kazu["+k+"] > "+kazu[k]);
          g.drawPolyline(xp[k], yp[k], kazu[k]);
      }
    }
    public static void main(String[] args) {
      JFrame app = new JFrame("Display Name");
      app.add(new filename());
      app.setSize(300, 300);
      app.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      app.setVisible(true);
    }
  }