setting up the size of a JTable to the size of a vector

[clare summers]

Hi
I want to read in a file when the focus is lost behind JTextfield1 and when i read in this file i want to be able to set up the JTable to the size of the vector.
Could anyone help please?
thanks
C

String token = null;
String currentToken = "";

 Infile = ivjJTextField1.getText();
try {


FileReader file = new FileReader(Infile);
BufferedReader buff = new BufferedReader(file);
String line = buff.readLine();
StringTokenizer s = null;
boolean eof = false;
while  (!eof){
s = new StringTokenizer(line.trim(),",",true);
boolean lastToken = true;
while (s.hasMoreTokens()) {
 token = s.nextToken();
     if (lastToken){ 
 if (token.equals(",")) {
 v.add("");
     }
                       lastToken = false;
 } 
         if (! token.equals(",")) {
 v.add(token); 
     } 
else { if (currentToken.equals(",")) {
 v.add("");

 } 
} 
currentToken = token;
}
 if (token.equals(",")) {
  v.add(""); 
}      

line = buff.readLine();
if (line == null)
eof = true;
}


//System.out.println(v.size());
 //jg = v.size();
//System.out.print(jg);
 

buff.close();
}catch (FileNotFoundException fe) {
System.out.println("Error - - " + fe.toString());
}catch (NumberFormatException ne) {
System.out.println("Error - - " + ne.toString());
} catch (IOException e) {
System.out.println("Error - - " + e.toString());

    
         
}

[Jason Moors]

Hi Clare,
The easiest way is to create a two dimensional array from your vector and then create a new JTable using the following constructor.

  
JTable table = new JTable(rowData, columnNames);

However a better method would be to extend the TabelModel.
If you need an example let me know!
Jason.

[clare summers]

Hi jason
Thanks for the reply
Yes could you please give me an example
Thanks
c

[Jason Moors]

Hi Clare,
I've modified a AbstractTableModel that I've used for reading a variable length CSV file.
You need to create an instance of the model and then pass the model in the JTable constructor.
e.g

  
CsvTableModel csvTableModel = new CsvTableModel();
JTable table = new JTable(csvTableModel);
...
csvTableModel.populateTable(filename);

 
import javax.swing.table.*;
import java.util.*;
import java.io.*;
/**
 * The abstract class provides default implementations for most of the methods
 * in the TableModel interface.
 *
 * We only need to implement the following methods.
 */
public class CsvTableModel extends AbstractTableModel
{
privateint m_maxRowCount  = 0;
privateint m_maxColumnCount = 0;
private Vectorm_tableData = null;
public int getRowCount()
{
return m_maxRowCount;
}
public int getColumnCount()
{
return m_maxColumnCount;
}
public Object getValueAt(int row, int column)
{
Object value = new String("");
// This could be simplified if the column data was
// of a fixed length!
if(m_tableData != null)
{
if(row < m_tableData.size())
{
Vector rowData = (Vector)m_tableData.get(row);
if(column < rowData.size())
{
value = rowData.get(column);
}
}
}
return value;
}

/**
 * This method will populate the table from your csv file.
 */
public void populateTable(String csvFilename)
{
try
{
// Open file
FileReader fileReader = new FileReader(csvFilename);
BufferedReader buff = new BufferedReader(fileReader);
// Create a new Table Data object
m_tableData = new Vector();
boolean eof = false;
while(!eof)
{
String line = buff.readLine();
if(line != null)
{
StringTokenizer tokenizer = new StringTokenizer(line.trim(),",",true);
Vector rowData = new Vector();
while(tokenizer.hasMoreTokens())
{
String value = "";
// Put your token logic here!
// .........
// .........
// Add new value to row data
rowData.add(value);
}
if(rowData.size() > m_maxColumnCount)
{
// Store maximum column count
m_maxColumnCount = rowData.size();
}
// Add row data to table data
m_tableData.add(rowData);
}
else
{
eof = true;
}
}
m_maxRowCount = m_tableData.size();

// Inform the table view that the table structue has changed!
fireTableStructureChanged();
}
catch(FileNotFoundException fe)
{
System.out.println("Error - - " + fe.toString());
}
catch(NumberFormatException ne)
{
System.out.println("Error - - " + ne.toString());
}
catch(IOException e)
{
System.out.println("Error - - " + e.toString());
}
}
}

Hope it helps!
Jason.