How to make readOnly() file?

[Vlad Stan]

How can i make that file is read only and for example make it appear in desktop.
Cause i tried with readOnly(), and that didnt work for me.

Could you help me with my code please?

 public void writeCSVfile(JTable table) throws IOException, ClassNotFoundException, SQLException{
		        Writer writer = null;
		        DefaultTableModel dtm = (DefaultTableModel) table.getModel();
		        int nRow = dtm.getRowCount();
		        int nCol = dtm.getColumnCount();
		        try {
		        	
		            writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream("fileee.txt"), "utf-8"));
		            
		            //write the header information
		            StringBuffer bufferHeader = new StringBuffer();
		            for (int j = 0; j < nCol; j++) {
		                bufferHeader.append(dtm.getColumnName(j));
		                if (j!=nCol) bufferHeader.append(", ");
		            }
		            writer.write(bufferHeader.toString() + "\r\n");

		           //write row information
		            for (int i = 0 ; i < nRow ; i++){
		                 StringBuffer buffer = new StringBuffer();
		                for (int j = 0 ; j < nCol ; j++){
		                    buffer.append(dtm.getValueAt(i,j));
		                    if (j!=nCol) buffer.append(", ");
		                }
		                writer.write(buffer.toString() + "\r\n");
		            }
		        } finally {
		              writer.close();
		        }}

[Stephan van Hulst]

Hi Vlad, welcome to CodeRanch!

You should probably take a look at Files.setAttribute() to set an operating system specific attribute (such as "acl:acl", "posix:permissions" or "dos:readonly").

If that fails, take a look at File.setReadOnly().

[Vlad Stan]

Stephan van Hulst wrote:Hi Vlad, welcome to CodeRanch!

You should probably take a look at Files.setAttribute() to set an operating system specific attribute (such as "acl:acl", "posix:permissions" or "dos:readonly").

If that fails, take a look at File.setReadOnly().

well no idea , but i couldnt make it work,checked so much guides but....
readOnly was fine but when you open it still can write on it...

[Stephan van Hulst]

What operating system are you working with?

[Vlad Stan]

Stephan van Hulst wrote:What operating system are you working with?

Win7 x64 Eclipse gui builder.
only thing that missing in my whole procjet... have been struggling few days already

[Knute Snortum]

Can you post the code that is trying to set the file to read only?

[Stephan van Hulst]

This works just fine for me:

private static void setReadOnly(Path path, boolean readOnly) throws IOException {
  Files.setAttribute(path, "dos:readonly", readOnly);
}

[Knute Snortum]

And this worked for me:

File file= new File("some_file.txt");
file.setReadOnly();

[Vlad Stan]

Knute Snortum wrote:Can you post the code that is trying to set the file to read only?

	public void actionPerformed(ActionEvent e) {
					
					try{ //the file path 
						File file = new File("C:\\Users\\Kristers\\Desktop\\New folder (4)\\tt\\TEET.txt"); 
						//if the file not exist create one 
						  if (file.exists()) {
				              file.delete();
				            }
				        	file.setReadOnly();
				        	file.setWritable(false);
						 FileWriter fw = new FileWriter(file.getAbsoluteFile());
						 BufferedWriter bw = new BufferedWriter(fw);
						 //loop for jtable rows 
						 for(int i = 0; i < table.getRowCount(); i++){
						 //loop for jtable column 
						 for(int j = 0; j < table.getColumnCount(); j++){
						 bw.write(table.getModel().getValueAt(i, j)+" ");
						 } //break line at the begin 
						 //break line at the end 
						 bw.write("\n_________\n"); 
						 } //close 
						  bw.close();
						 //close 
						 fw.close();
						 JOptionPane.showMessageDialog(null, "Data Exported");
						 }
						 catch(Exception ex){
						 ex.printStackTrace(); 
						 } 
					
				}
			});

[Carey Brown]

Call setReadOnly() after you write and close the file.

[Vlad Stan]

Carey Brown wrote:Call setReadOnly() after you write and close the file.

Awsome did work now!

but how is it possible to get output:

19/4/2016 Kristers Drozds null  null null null 5  19/4/2016 Kristers Drozds 5 

my current output , but i want to get it -

19/4/2016 Kristers Drozds 5 

public void actionPerformed(ActionEvent e) {
                 
                try{ //the file path 
                    File file = new File("C:\\Users\\Kristers\\Desktop\\New folder (4)\\tt\\TEET.txt"); 
                    //if the file not exist create one 
                      if (file.exists()) {
                          file.delete();
                        }
                     FileWriter fw = new FileWriter(file.getAbsoluteFile());
                     BufferedWriter bw = new BufferedWriter(fw);
                     //loop for jtable rows 
                     for(int i = 0; i < table.getRowCount(); i++){
                     //loop for jtable column 
                     for(int j = 0; j < table.getColumnCount(); j++){
                     bw.write(table.getModel().getValueAt(i, j)+" ");
                     } //break line at the begin 
                     //break line at the end 
                     bw.write("\n_________\n"); 
                     } //close 
                      bw.close();
                     //close 
                     fw.close();

                        file.setReadOnly();
                        file.setWritable(false);
                     JOptionPane.showMessageDialog(null, "Data Exported");
                     }
                     catch(Exception ex){
                     ex.printStackTrace(); 
                     } 
                 
            }
        });

[Carey Brown]

Vlad Stan wrote:but how is it possible to get output:

19/4/2016 Kristers Drozds null  null null null 5  19/4/2016 Kristers Drozds 5 

my current output , but i want to get it -

19/4/2016 Kristers Drozds 5 

I don't see anything obviously wrong with your code. I'd need to know more about your table model. You seem to have more columns in your model than you want to write. Can you just write out the specific columns that you're interested in? You may have an issue with your newlines: \n vs \r\n, depending on which program you use to view the file.

[Vlad Stan]

Carey Brown wrote:
I don't see anything obviously wrong with your code. I'd need to know more about your table model. You seem to have more columns in your model than you want to write. Can you just write out the specific columns that you're interested in? You may have an issue with your newlines: \n vs \r\n, depending on which program you use to view the file.

String[] columns = {"Datums ","  Vards ","   Uzvards " };
				   DefaultTableModel model = new DefaultTableModel();
				   model.setColumnIdentifiers(columns);
 Object[] row = new Object[4];
		    Object[] row1 = new Object[4];
		    Object[] row2 = new Object[4];

btnNewButton_3.addActionListener(new ActionListener() {
					public void actionPerformed(ActionEvent arg0) {
						row2[2] = "";  
						row2[0] = "Punkti - ";
						row2[1] = gala.getText();  
						 model.addRow(row2);
					
					    
					}
				});



  row1[0] = textField.getText();
							 row1[1] = textFname.getText();
							 row1[2] = textLname.getText(); 
							 row1[3] = "";
							
							                model.addRow(row1);
							
					        	    }else{
					        	    	
					        	    }
						}

Well

 row1[1] = textFname.getText();
			row1[2] = textLname.getText(); 

this writes in first column the first name and lastname that user enters(on button click)

row2[2] = "";  
						row2[0] = "Punkti - ";
						row2[1] = gala.getText();  
						 model.addRow(row2);

When he pushes test is done, it counts up correct answers and put them in second row.

Hope this helps .... cause i got around 1000+lines ^.^

[Carey Brown]

I put together this small program from your code. It works for me except that the format is off when I view it with Notepad, i.e. your "\n" would need to be "\r\n", as I said.

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;

import javax.swing.JOptionPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;

public class JTable2Txt
{
	static JTable table;

	public static void main( String[] args )
	{
		String[] columns = { "Date", "Last", "First" };
		DefaultTableModel model = new DefaultTableModel();
		model.setColumnIdentifiers( columns );
		table = new JTable( model );
		
		Object[] row = new Object[4];
		Object[] row1 = new Object[4];
		Object[] row2 = new Object[4];

		row[0] = "10/25/1948";
		row[1] = "Doe";
		row[2] = "John";
		row[3] = 5;
		model.addRow( row );

		row1[0] = "04/08/1954";
		row1[1] = "mylast";
		row1[2] = "myfirst";
		row1[3] = "";

		model.addRow( row1 );
		
		write();
	}

	public static void write()
	{
		try
		{
			File file = new File( "JUNK.txt" );
			if( file.exists() )
			{
				file.delete();
			}
			FileWriter fw = new FileWriter( file.getAbsoluteFile() );
			BufferedWriter bw = new BufferedWriter( fw );
			for( int i = 0 ; i < table.getRowCount() ; i++ )
			{
				for( int j = 0 ; j < table.getColumnCount() ; j++ )
				{
					bw.write( table.getModel().getValueAt( i, j ) + " " );
				}
				bw.write( "\n_________\n" );
			}
			bw.close();
			fw.close();

			file.setReadOnly();
			file.setWritable( false );
			JOptionPane.showMessageDialog( null, "Data Exported" );
		}
		catch( Exception ex )
		{
			ex.printStackTrace();
		}
	}

}