How to monitor progress when reading a text file
Hi All!
I've created an application that read a text files and then displays it content onto
a JTextArea. The process is done well, how ever I need help to make my application
look better by putting progress bar(or else) to monitor the progress of reading the text file,
esp the big text file. How should I do it.
Below is a partial of the working code. My question is how and where to put the code
that monitor the progress. Any help please.
..
..
// Field for file path
JTextField tf_filePath;
String filePath ="";
..
..
JFileChooser fileChooser;
..
..
// open directory code goes here
fileChooser =new JFileChooser();
fileChooser.setFileSelectionMode(
JFileChooser.FILES_AND_DIRECTORIES);//DIRECTORIES_ONLY);
int returnVal = fileChooser.showOpenDialog(tf_filePath);
if(returnVal == JFileChooser.APPROVE_OPTION)
{
// do process when open file is true
File file = fileChooser.getSelectedFile();
tf_filePath.setText(file.getPath());
filePath = file.getPath();
String[] strData =new String[2];
strData = readDataFile(filePath);
ta_openFile.setText(strData[1]);
}
..
..
/*
This funtion is to read the text file and rearranged
the text line by line as in .txt file.
None existed file will return strData=[N,""]
Existed file will return strData=[Y, String of texts]
*/
public String[] readDataFile(String fileTM)
{
String record =null;
String[] strData =new String[2];
strData[0] ="N";// N - file not found, Y - found file
strData[1] ="";// to hold data
try{
FileReader fr =new FileReader(fileTM);
BufferedReader br =new BufferedReader(fr);
record =new String();
while ((record = br.readLine()) !=null)
{
strData[1] = strData[1] + record +"\n";
}
strData[0] ="Y";
}catch (IOException e)
{
// catch possible io errors from readLine()
System.out.println(" an IOException error!");
e.printStackTrace();
strData[0] ="N";
strData[1] ="";
}
return strData;
}
