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How to add rows to a JTable dynamically?

In my program I will add rows to a JTable dynamically. My codes look like follows:

...
...
private javax.swing.JTable jTable = null;
...
private javax.swing.JTable getJTable() {
  if(jTable == null) {
    jTable = new javax.swing.JTable();
  }
  return jTable;
}
...
...
for(int i= 0; i<5; i++)
  jTable.addColumn(new javax.swing.table.TableColumn(i,15));  // the table has 5 columns
...
...
// now I will read data from a file and insert into the table.
try{
  BufferedReader in = new BufferedReader(new FileReader(tableFileName));
  String line;
  while((line = in.readLine()) != null)
  {
     // here a row will be added to jtable;
  }
...
...
            
0
chenwei
Asked:
chenwei
  • 4
1 Solution
 
zzynxSoftware engineerCommented:
your table uses the DefaultTableModel (by default), so:

       DefaultTableModel model = (DefaultTableModel) whateverObject.getTable().getModel();
On that model you can call

 void addRow(Object[] rowData)
or
 void addRow(Vector rowData)

they both add a row to the end of the model
0
 
zzynxSoftware engineerCommented:
Assuming that your file is a CSV file containing the column data:
E.g.  column1Data,column2 Data,Data3,Data4,Data5

while((line = in.readLine()) != null) {
     model.addRow( line.split(",") );
}
0
 
rohanbairat3Commented:
You can use DefaultTableModel or write your own model. It is very easy. These models identify the change by itself and would update the JTable automatically. You dont have to worry abt forcing the updates
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chenweiAuthor Commented:
To zzynx:

Thanks, it works. But How can I set the table cell non-editable?
0
 
zzynxSoftware engineerCommented:
That's another Q isn't it?

>>How can I set the table cell non-editable?
Use your own TableModel (extending DefaultTableModel).

and overwrite the function

  boolean isCellEditable(int row, int column) {
      if (column==1)
         return false;   // makes the 2nd column non-editable
      return true;
  }
0
 
zzynxSoftware engineerCommented:
Thanks for accepting
0
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