package sixteen;import java.awt.Color;import java.awt.Frame;import java.awt.Graphics;import java.awt.event.WindowEvent;import java.awt.event.WindowListener;public abstract class XYGrapher extends Frame implements WindowListener{ private int xpixelStart; private int ypixelStart; private int pixelshigh; private int pixelswide; abstract protected Coordinate xyStart(); // Where the graph will start (LLC) abstract protected double xRange(); // Width + height of graphing area abstract protected double yRange(); abstract protected Coordinate getPoint(int pointNum); public void init(){ this.setVisible(true); } public void windowClosed(WindowEvent e){ //System.exit(0); } public void windowClosing(WindowEvent e){ //System.exit(0); } public void drawGraph(int xPixelStart, int yPixelStart, int pixelsWide, int pixelsHigh){ xpixelStart = xPixelStart; ypixelStart = yPixelStart; pixelswide = pixelsWide; pixelshigh = pixelsHigh; } public void paint(Graphics gr){ int yPixelStart = ypixelStart; int xPixelStart = xpixelStart; int pixelsWide = pixelswide; int pixelsHigh = pixelshigh; yPixelStart = yPixelStart + 10; this.setSize(pixelsWide + xPixelStart, pixelsHigh+ yPixelStart); pixelsWide = pixelsWide + xPixelStart; pixelsHigh = pixelsHigh + yPixelStart; this.setVisible(true); // Make a new applet pWxpH Coordinate point = getPoint(0); // Get the first point int pointNum = 0; double xRange = xRange(); // Range of x and y on the graph double yRange = yRange(); double xStart = xyStart().getX(); // Starting value of x and y in double yStart = xyStart().getY(); // lower left hand corner gr.setColor(Color.green); if((xStart < 0) && (xStart + xRange > 0)){ //Graph the yAxis if possible gr.drawLine( // y axis getInt(xPixelStart-(xStart*(pixelsWide/xRange))), getInt(yPixelStart - 10), getInt(xPixelStart-(xStart*(pixelsWide/xRange))), getInt(yPixelStart + pixelsHigh)); } if((yStart < 0) && (yStart + yRange > 0)){ //Graph the xAxis if possible gr.drawLine( getInt(xPixelStart), getInt(yPixelStart + (yStart+yRange)*(pixelsHigh/yRange)), getInt(xPixelStart + pixelsWide), getInt(yPixelStart + (yStart+yRange)*(pixelsHigh/yRange))); } gr.setColor(Color.black); int lastx = 0; // initialize last coordinates int lasty = 0; while(point != null){ // As long as the point exists... double X = point.getX(); // X = x coord double Y = point.getY(); // Y = y coord int xPixel = getInt( // map x to xPixel xPixelStart + (X-xStart)*(pixelsWide/xRange)); int yPixel = getInt( // map y to yPixel yPixelStart + (yStart+yRange-Y)*(pixelsHigh/yRange)); //gr.drawLine(xPixel,yPixel,xPixel+1,yPixel+1); //Draw the point if(pointNum != 0){ // if not first point, draw line gr.drawLine(lastx, lasty, xPixel, yPixel); } pointNum++; //update pointNum point = getPoint(pointNum); lastx = xPixel; lasty = yPixel; } } private int getInt(double doub){ int count = 0; while(doub > 1){ count++; doub--; } return count; }}