import java.awt.*;
import javax.swing.*;
import javax.swing.text.*;
import javax.swing.undo.*;
import java.awt.event.*;
import java.io.*;
import java.lang.*;
import java.util.regex.*;
public class Editor1 extends JFrame implements ActionListener
{
        static String select;
        BufferedReader br;
        JFileChooser fc;
        JMenuBar mb;
        JScrollPane js;
        JMenu file,edit,search,build,run,help;
        JMenuItem nw,open,save,saveAs,print,exit,undo,redo,cut,copy,paste,find,replace,goToLineNumber,compile,javadoc,execute;
        JTextArea ta;
        Font f;
        Container c,c1;
        String fname;
        public Editor1()
        {
        select=" ";
        br=new BufferedReader(new InputStreamReader(System.in));
        fc= new JFileChooser();
                                         //go to content pane
        c=getContentPane();
                                                //set BorderLayout to c
        c.setLayout(new BorderLayout());
                                        //create textarea
        ta=new JTextArea(100,100);
                                        //add ta to c
        c.add("West",ta);
                                         // creates a scrollbar
        js = new JScrollPane(ta,JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
 
JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
        c.add(js);
        //ta.addActionListener(this);
                                    //set font
        f=new Font("sansserif",Font.PLAIN,17);
        ta.setFont(f);
                                        //create the menubar
        mb=new JMenuBar();
                                        //add mb to c
        c.add("North",mb);
                                       //create file,edit,search,build,run,help menus
        file=new JMenu("File");
        edit=new JMenu("Edit");
        search=new JMenu("Search");
        build=new JMenu("Build");
        run=new JMenu("Run");
        help=new JMenu("Help");
                                      //add menus to mb
        mb.add(file);
        mb.add(edit);
        mb.add(search);
        mb.add(build);
        mb.add(run);
        mb.add(help);
                                     //create menu items
        nw=new JMenuItem("New");
        open=new JMenuItem("Open");
        save=new JMenuItem("Save");
        saveAs=new JMenuItem("Save As");
        print=new JMenuItem("Print");
        exit=new JMenuItem("Exit");
        undo=new JMenuItem("Undo");
        redo=new JMenuItem("Redo");
        cut=new JMenuItem("Cut");
        copy=new JMenuItem("Copy");
        paste=new JMenuItem("Paste");
        find=new JMenuItem("Find");
        replace=new JMenuItem("Replace");
        goToLineNumber=new JMenuItem("Go to line number");
        compile=new JMenuItem("Compile");
        javadoc=new JMenuItem("Javadoc");
        execute=new JMenuItem("Execute");
                                   //add menuitems to menus
        file.add(nw);
        file.add(open);
        file.add(save);
        file.add(saveAs);
        file.addSeparator();
        file.add(print);
        file.add(exit);
        edit.add(undo);
        edit.add(redo);
        edit.addSeparator();
        edit.add(cut);
        edit.add(copy);
        edit.add(paste);
        search.add(find);
        search.add(replace);
        search.add(goToLineNumber);
        build.add(compile);
        build.add(javadoc);
        run.add(execute);
        nw.addActionListener(this);
        open.addActionListener(this);
        save.addActionListener(this);
        saveAs.addActionListener(this);
        print.addActionListener(this);
        exit.addActionListener(this);
        undo.addActionListener(this);
        redo.addActionListener(this);
        cut.addActionListener(this);
        copy.addActionListener(this);
        paste.addActionListener(this);
        find.addActionListener(this);
        replace.addActionListener(this);
        goToLineNumber.addActionListener(this);
        compile.addActionListener(this);
        javadoc.addActionListener(this);
        execute.addActionListener(this);
                                           //close the frame
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        }
        public void actionPerformed(ActionEvent ae) 
        {
                                       //to know which item is selected
              try
               {
         if(nw.isArmed())
         {
         ta.setText(" ");
         this.setTitle("SMART JAVA EDITOR-UnTitle.java");
         }
                                       //end of new */    
         if(open.isArmed()) 
         {
           int i=fc.showOpenDialog(this);
           if(i==JFileChooser.APPROVE_OPTION)
           {
           fname=fc.getSelectedFile().getName();
           FileReader fr=new FileReader(fname);
           BufferedReader br1=new BufferedReader(fr,1024);
           this.setTitle("SMART JAVA EDITOR-"+fname);
           String str;
           while(((str=br1.readLine()).length())!=-1)
           {
           ta.append(str+"\n");
           }
           br1.close();
           }
         }                            //end of open
          if(save.isArmed())
          {
           fname=getTitle();
          if(fname.equals("SMART JAVA EDITOR-Untitle.java"))
             {
             int i=fc.showSaveDialog(this);
             if(i==JFileChooser.APPROVE_OPTION)
             {
             fname=fc.getSelectedFile().getName();
             }
             }
             setTitle("SMART JAVA EDITOR-"+fname);
           String str;
           FileWriter fw=new FileWriter(fname);
           BufferedWriter bw=new BufferedWriter(fw,1024);
           str=ta.getText();          
             for(int j=0;j<str.length();j++)
             {
             bw.write(str.charAt(j));
             }
             bw.close();
 
          }                            //end of save
         if(saveAs.isArmed())
         {
             int i=fc.showSaveDialog(this);
             if(i==JFileChooser.APPROVE_OPTION)
             {
              fname=fc.getSelectedFile().getName();
           setTitle("SMART JAVA EDITOR-"+fname);
           String str;
           FileWriter fw=new FileWriter(fname);
           BufferedWriter bw=new BufferedWriter(fw,1024);
           str=ta.getText();          
             for(int j=0;j<str.length();j++)
             {
             bw.write(str.charAt(j));
             }
             bw.close();
             }
         }                            //end of saveAs
         /*if(print.isArmed())
         {
         }                            //end of print*/
         if(exit.isArmed())
         {
         System.exit(0);
         }                            //end of exit
        /* if(undo.isArmed())
         {
        // UndoRedoDemo urd=new UndoRedoDemo(this.ta,"undo");
         //ta.undo();
         }*/
       /*  if(redo.isArmed())
         {
         }*/
         if(cut.isArmed())
         {
         select=ta.getSelectedText();
         ta.cut();
         }                            //end of cut
         if(copy.isArmed())
         {
         ta.copy();
         select=ta.getSelectedText();
         }                            //end of copy
         if(paste.isArmed())
         {
         if(!(select.equals(" ")))
         ta.paste();
         }                            //end of paste
         if(find.isArmed())
         {
         FindDemo fd=new FindDemo(this.ta);
         }                            //end of find
         if(replace.isArmed())
         {
         ReplaceDemo rd=new ReplaceDemo(this.ta);
         }                            //end of replace
         if(goToLineNumber.isArmed())
         {
           GoToLineNumberDemo gd= new GoToLineNumberDemo(this.ta);
         }                            //end of goToLineNumber
        /* if(compile.isArmed())
         {
         Class c=Class.forName("sairam");
         //String xxx="Editor1";
         Boolean b=Compiler.compileClass(c);
         System.out.println(b);
         }*/                            //end of compile
         /*if(javadoc.isArmed())
         {
         }                            //end of javadoc*/
         if(execute.isArmed())
         {
         Runtime rt=Runtime.getRuntime();
         Process prc=rt.exec(Editor1);
         InputStreamReader is=new InputStreamReader(prc.getInputStream());
         }                            //end of execute     
       }                               //end of try
       catch(IOException ie)
       {
       }                               //end of catch
       catch(CannotUndoException be)
       {
       }    
       catch(NullPointerException ne)
       {
       }
       catch(ClassNotFoundException c)
       {
       System.out.println("class");
       }
       }                                //end of paint()
public static void main(String args[])throws IOException
        {
                                          //create the frame
        Editor1 e=new Editor1();
        e.setTitle("SMART JAVA EDITOR-Untitle.java");
        e.setSize(800,600);
        e.setVisible(true);
        }                                            
}