jtable中的列名

   defaulttablemodel model = new defaulttablemodel（);
    jtable table = new jtable（model);
    
    // create 2 columns
    model.addcolumn（"col1");
    model.addcolumn（"col2");
    
    // change name of first visible column
    int vcolindex = 0;
    table.getcolumnmodel（).getcolumn（vcolindex).setheadervalue（"new name");
    
    // force the header to resize and repaint itself
    table.gettableheader（).resizeandrepaint（);