lineplotpanel.java

Java Design Pattern:Strategy 希望对大家有所帮助！

import java.awt.*;
import java.awt.event.*;
import java.util.*;

//swing classes
import javax.swing.text.*;
import javax.swing.*;
import javax.swing.event.*;

public class LinePlotPanel extends PlotPanel {

    public void paint(Graphics g) {
        super.paint(g);
        int xp = calcx(x[0]);      //get first point
        int yp = calcy(y[0]);
        g.setColor(Color.white);   //flood background
        g.fillRect(0,0,getWidth(), getHeight());
        g.setColor(Color.black);

        //draw bounding rectangle
        g.drawRect(xpmin, ypmin, xpmax, ypmax);
        g.setColor(color);

        //draw line graph
        for (int i=1; i< x.length; i++) {
            int xp1 = calcx(x[i]);
            int yp1 = calcy(y[i]);
            g.drawLine(xp, yp, xp1, yp1);
            xp = xp1;
            yp = yp1;
        }
    }

}