Please help me

In my JTable maybe have a lot of columns.

How can i set size of each column?
How can i have horizontal scroll bar if have too columns?


please help

JTable table=new JTable();//your table should have JScollPan and already setsize in JFrame
......................

DefaultTableModel model=new DefaultTableModel();
TableColumn col;

table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
table.setModel(model);
model.addColumn("TNAME");
model.addColumn("TABTYPE");
model.addColumn("CLUSTERID");

col=table.getColumnModel().getColumn(0);
col.setPreferredWidth(300);