import java.awt.*;import java.applet.*;import java.net.URL;import java.util.*;import graph.*;/*****************************************************************************    Applet example3**                                              Version 1.0   January 1996******************************************************************************    Copyright (C) 1996 Leigh Brookshaw****    This program is free software; you can redistribute it and/or modify**    it under the terms of the GNU General Public License as published by**    the Free Software Foundation; either version 2 of the License, or**    (at your option) any later version.****    This program is distributed in the hope that it will be useful,**    but WITHOUT ANY WARRANTY; without even the implied warranty of**    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the**    GNU General Public License for more details.****    You should have received a copy of the GNU General Public License**    along with this program; if not, write to the Free Software**    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.******************************************************************************    This applet demonstrates the interactive event handling of**    the G2Dint class***************************************************************************/public class example3 extends Applet {      LoadData dynamic;      G2Dint graph;      Label title;      DataSet data1;      Axis    xaxis;      Axis    yaxis;      public void init() {        int i;        int j;/***      Get the title of the plot and the data URL as parsed parameters*/        String st = getParameter("TITLE");        String data  = getParameter("DATA");/***      Instantiate the Graph class and the LoadData class*/        graph = new G2Dint();        dynamic = new LoadData();        graph.borderTop    = 30;        graph.borderBottom = 10;        graph.borderRight  = 40;        graph.setDataBackground(new Color(50,50,200));        graph.setGraphBackground(new Color(0,200,255));/***      Build the title and place it at the top of the graph*/        graph.setFont(new Font("TimesRoman",Font.PLAIN,25));        title = new Label(st, Label.CENTER);        title.setFont(new Font("TimesRoman",Font.PLAIN,25));        setLayout( new BorderLayout() );        add("North",  title);        add("Center", graph);/***      Start a new thread and load the data*/        try {        data1 = dynamic.loadDataSet(new URL(getDocumentBase(),data), graph);        } catch (Exception e) {          System.out.println("Failed to load data file!");        }/***      Specify the data line color*/        data1.linecolor = new Color(255,255,0);/***      Instantiate the xaxis and attach the dataset.*/        xaxis = graph.createXAxis();        xaxis.attachDataSet(data1);        xaxis.setTitleText("Wavelength_(angstroms)");        xaxis.setTitleColor(Color.magenta);        xaxis.setTitleFont(new Font("TimesRoman",Font.ITALIC,25));        xaxis.setLabelFont(new Font("Helvetica",Font.PLAIN,20));/***      Instantiate the yaxis and attach the dataset.*/        yaxis = graph.createYAxis();        yaxis.attachDataSet(data1);        yaxis.setTitleText("Flux");        yaxis.setTitleColor(Color.magenta);         yaxis.setTitleFont(new Font("TimesRoman",Font.ITALIC,25));        yaxis.setLabelFont(new Font("Helvetica",Font.PLAIN,20));      }}