?? applet1.java~9~
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package vector;import java.awt.*;import java.awt.event.*;import java.applet.*;import java.util.Vector;public class Applet1 extends Applet { private Vector xVector; private Vector yVector; boolean isStandalone = false; /**Get a parameter value*/ public String getParameter(String key, String def) { return isStandalone ? System.getProperty(key, def) : (getParameter(key) != null ? getParameter(key) : def); } /**Construct the applet*/ public Applet1() { } /**Initialize the applet*/ public void init() { xVector = new Vector(360); yVector = new Vector(360); double x,y; Double xObject,yObject; for(int i = 0;i<360;i++){ x = -1.8+0.01*i; y = Math.exp(x); xObject = new Double(x*20+150); yObject = new Double(y*50+20); xVector.addElement(xObject); yVector.addElement(yObject); } try { jbInit(); } catch(Exception e) { e.printStackTrace(); } } public void paint(Graphics g){ int x1,y1,x2,y2; for(int i=0;i<360;i++){ x1=((Double)xVector.elementAt(i)).intValue(); y1=((Double)yVector.elementAt(i)).intValue(); x2=((Double)xVector.elementAt(i+1)).intValue() ; y2=((Double)yVector.elementAt(i+1)).intValue() ; g.drawLine(x1,y1,x2,y2); } } /**Component initialization*/ private void jbInit() throws Exception { } /**Get Applet information*/ public String getAppletInfo() { return "Applet Information"; } /**Get parameter info*/ public String[][] getParameterInfo() { return null; }}?? 快捷鍵說明
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