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java.lang.ClassCastException: 	at javax.swing.table.DefaultTableModel.justifyRows(DefaultTableModel.java:238)	at javax.swing.table.DefaultTableModel.setDataVector(DefaultTableModel.java:194)	at javax.swing.table.DefaultTableModel.(DefaultTableModel.java:131)	at javax.swing.JTable.(JTable.java:392)	at gestiontable.DBTableau.(DBTableau.java:32)	at gestiontable.DBTableau.main(DBTableau.java:42)