Ho una cartella, da questa estrapolo i file contenuti in essa, devo stampare a video alcuni loro attributi in formato tabellare.

codice:
class Mostra_Diff extends JPanel{
     
     File dir1, dir2;
     File[] files;
     String col [] = {"File","Cartella","Dimensione","Data","Ora"};
     String data[][];
     
     JTableHeader head;
     JScrollPane scroll;
     JTable table;
     DefaultTableModel modeltable;
     
     
     Mostra_Diff(){
          
          dir1= Confronta_Panel.dir;
          dir2= Confronta_Panel_2.dir;
          files = dir1.listFiles();           
                              
          modeltable = new DefaultTableModel(data,col);
          
          if (files == null) {
              // Either dir does not exist or is not a directory
          } 
          else{
              for (int i=0; i<files.length; i++) {
              // Get filename of file or directory
              String filename[] = {files[i].getName(),files[i].getParent(), ""+files[i].getTotalSpace()};
              modeltable.addRow(filename);
              }
          }         
          
          table = new JTable(modeltable);
          table.setIntercellSpacing(new Dimension(20,1));
          scroll = new JScrollPane(table);
          SetRowHight(table);
          table.setColumnSelectionAllowed(true);
          table.setAutoCreateRowSorter(true);
          head = table.getTableHeader();
          //head.setBackground(Color.YELLOW);
          
          add(scroll);
             
          Utilities.settingPanel(this);       
          setLayout(new FlowLayout());
          
     }

     public void SetRowHight(JTable table){
          
            int height = table.getRowHeight();
            table.setRowHeight(height+10);
     }
     
}
Il problema sta in questo ciclo
codice:
              for (int i=0; i<files.length; i++) {
              // Get filename of file or directory
              String filename[] = {files[i].getName(),files[i].getParent(), ""+files[i].getTotalSpace()};
              modeltable.addRow(filename);
perchè se ci metto un
codice:
    String[] filename = { "Hannah", "Arendt", "1906-1975", "  ", "  " };
    model.addRow(filename);
funziona