Implementation of the WriteFileOnTextArea() method for Calculator Application

Implementing the WriteFileOnTextArea() Method

The method WriteFileOnTextArea() is defined in the class, File_class. The method is used to write in the FileOutput.txt.

Declaration of the method, WriteFileOnTextArea()

public void WriteFileOnTextArea()// Method to write in the file.
{
         String str;
         char st;
str="";
try
{
  DataInputStream If=new DataInputStream(new FileInputStream("FileOut.txt"));
    while(If.readLine()!=null)
    {
        if ((st=If.readChar())!='E')
          {
                  str=st+str;
          }
          if (st=='E')
          {
          textarea1.setText("");
        textarea1.append(str);
          textarea1.append("n");
        str="";
          }
      }//Ed while.
      If.close();
}//End try.
  catch(FileNotFoundException e){}   //Catches the error if the file is not found.
    catch(IOException e) {}
}// End of method WriteFileOnTextArea().


The above listing shows the declaration of the WriteFileOnTextArea() method. The WriteFileOnTextArea() method reads a file named FileOutput.txt. The method also catches the FileNoteFoundException exception if the file FileOuput.txt does not exits.

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