import java.awt.*;
import java.awt.event.*;
import java.io.*;
public class Looja{
 static final int blokke=6;

 public static void loo() throws IOException{
   OutputStream out=new FileOutputStream(new File("NLorenz.java"));
   String andmed[]=new String[Looja.blokke];
   andmed[Looja.blokke-1]="public double length(double x, double y){"+
     " return Math.sqrt(x*x+y*y); \n}";
   String kood=Looja.looKood(andmed);
   andmed[Looja.blokke-1]=Looja.kompileeri(kood);
   while(!andmed[Looja.blokke-1].trim().equals("")){
    andmed[Looja.blokke-1]+="\n\n"+kood;
    kood=Looja.looKood(andmed, "Last error message");
    andmed[Looja.blokke-1]=Looja.kompileeri(kood);
   }
  System.out.println("Kompileeritud");
 }

 public static String looKood(){
   String[] meetodid=new String[Looja.blokke];
   for(int i=0; i<Looja.blokke; i++){meetodid[i]="";}
   return Looja.looKood(meetodid, null);
 }
 public static String looKood(String[] andmed){
   return looKood(andmed, null);
 }
 public static String looKood(String[] andmed, String lastlabel){
   byte [] lause="algus".getBytes();
   try{System.out.write(lause);}catch(Exception e){}
   final Dialog dl=new Dialog(new Frame(), "Insert Lorenz equations", true);
   final Button ok=new Button("OK");
   dl.setLayout(new GridLayout(Looja.blokke+1, 1));
   Label[] lb=new Label[Looja.blokke];
   TextArea[] ta=new TextArea[Looja.blokke];
   TextArea erikood=new TextArea();
   String[] captions={
    "Constants. Examle:   a=3, b=5.5, m=-1",
    "Function f(x, y, z, t). Example:   a*Math.sqrt(x-1)",
    "Function g(x, y, z, t)",
    "Function h(x, y, z, t)",
    "Additional function(s) in java language (if needed).",
    "Example"
   };
   for(int k=0; k<Looja.blokke; k++){
     Panel p=new Panel();
     p.setLayout(new BorderLayout());
     lb[k]=new Label(captions[k]);
     p.add("North", lb[k]);
     ta[k]=new TextArea("", 40, 3, TextArea.SCROLLBARS_VERTICAL_ONLY);
     p.add("Center", ta[k]);
     dl.add(p);
   }
   if(lastlabel!=null)lb[Looja.blokke-1].setText(lastlabel);
 try{
  for(int i=1; i<Looja.blokke; i++) ta[i].setText(andmed[i]);
 } catch(Exception e){}
   dl.add(ok);
   ok.addActionListener(
    new ActionListener(){
      public void actionPerformed(ActionEvent e){
        dl.dispose();
      }
    }
   );
   dl.setSize(500, 500);
   dl.validate();
   boolean puudu;
  do{
   puudu=false;
   dl.setVisible(true);
   for(int i=1; i<4; i++){
    if(ta[i].getText().trim().equals("")){
     puudu=true;
     ta[i].setText("Write a equation or constant here");
    }
   }
  }while (puudu);
    System.out.println("Edasi");
   String tulemus=new String(
   "public class NLorenz extends Lorenz{\n"+
   ((!ta[0].getText().trim().equals(""))?" double ":"")+
   ta[0].getText()+";\n"+
   " protected double f(double x, double y, double z, double t)\n"+
   " {return "+ta[1].getText()+";}\n"+
   " protected double g(double x, double y, double z, double t)\n"+
   " {return "+ta[2].getText()+";}\n"+
   " protected double h(double x, double y, double z, double t)\n"+
   " {return "+ta[3].getText()+";}\n"+
   ta[4].getText()+"\n}"
 );
 for(int i=1; i<Looja.blokke; i++){
   andmed[i]=ta[i].getText();
 }
  return tulemus;
 }

 public static String kompileeri(String kood) throws IOException{
   System.out.println("Kompileerimise algus");
   PrintWriter pw=new PrintWriter(new FileOutputStream("NLorenz.java"), true);
   pw.println(kood);
   pw.close();
   Process pr=Runtime.getRuntime().exec("javac NLorenz.java");
   String tulemus="", vahe="";
   BufferedReader br=new BufferedReader(
     new InputStreamReader(pr.getErrorStream()));
   while((vahe=br.readLine())!=null){
    tulemus+=vahe+"\n";
    System.out.println(vahe);
   }
   try{pr.waitFor();}catch(Exception e){e.printStackTrace();}
   return tulemus;
 }
}