Java - run a java program with args within a Java program

Question

I have a JButton which opens JFileChooser and that in turn selects a file into a variable called "file".

I want to rename the selected file to "Best.html" and then provide it to TableToCSV.java (java TableToCSV.class Best.html), which will convert the selected file to a .csv format.

Here is my code -

final JFileChooser  fileDialog = new JFileChooser();
    JButton btnInputFile = new JButton("Input File");
    btnInputFile.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent arg0) {

            int returnVal = fileDialog.showOpenDialog(rootPane);
            if (returnVal == JFileChooser.APPROVE_OPTION) {
               java.io.File file = fileDialog.getSelectedFile();

            }

        }
    });

Note - I want to rename because the TableToCSV.java file only inputs file with a .html extension.

Note - TableToCSV.java lies in the same folder as my java program.

MadProgrammer · Accepted Answer · 2014-03-05 07:12:08Z

You have two options...

You Could...

Use TableToCSV main method...

TableToCSV.main(new String[]{file.getAbsolutePath()});

Which is essentially the same as calling it from the command line

Or You Could...

Use the TableToCSV constructor...

TableToCSV tableToCSV = new TableToCSV( file, ',', '\"', '#', CSV.UTF8Charset );

The problem with this is, TableToCSV is expecting a file name with a 4 char extension...So if you were to pass it a File with an extension of .txt, the resulting file won't appear as you expect it and could actually lead to some danger.

In this case you could use

String name = file.getName();
name = name.subString(0, name.lastIndexOf("."));
name += ".html";
File newFile = new File(file.getParentFile(), name);
if (file.renameTo(newFile)) {
    TableToCSV tableToCSV = new TableToCSV( newFile, ',', '\"', '#', CSV.UTF8Charset );
}

But I do hate renaming files...

shyam · Accepted Answer · 2014-03-05 07:11:17Z

0

Why not call the constructor of TableToCSV? Like in line 192 of TableToCSV.java?

 new TableToCSV( file, ',', '\"', '#', CSV.UTF8Charset );

answered Mar 5, 2014 at 7:11

shyam

9,3864 gold badges32 silver badges45 bronze badges

Comments

pezetem · Accepted Answer · 2014-03-05 07:11:55Z

0

Maybe something like this?

final JFileChooser  fileDialog = new JFileChooser();
        JButton btnInputFile = new JButton("Input File");
        btnInputFile.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {

                int returnVal = fileDialog.showOpenDialog(rootPane);
                if (returnVal == JFileChooser.APPROVE_OPTION) {
                   java.io.File file = fileDialog.getSelectedFile();
                   File newFile = new File("Best.html")
                   com.mindprod.TableToCSV(file.renameTo(newfile), ... );
                }

            }
        });

answered Mar 5, 2014 at 7:11

pezetem

2,5512 gold badges24 silver badges39 bronze badges

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