如何一键删除数据库中的所有行

我有一个两个数据库的表,在我的程序中单击一个按钮,我想删除所有两个表的数据。但桌子上总有一个数据。。这是我的代码:

 public void mouseClicked(MouseEvent arg0) {
                    int confirm = JOptionPane.showConfirmDialog(null, "Are you sure you want to delete the log? ", "Log", JOptionPane.YES_NO_OPTION );
                    if (confirm == JOptionPane.YES_OPTION){ 
                        try{

                            Class.forName( "sun.jdbc.odbc.JdbcOdbcDriver");
                            con = DriverManager.getConnection("jdbc:odbc:RIM");
                            Statement st1 = con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
                            Statement st2 = con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
                            String sql1 = "select * from userLogIn";
                            ResultSet rs1 = st1.executeQuery(sql1);
                            String sql2 = "select * from userViewed";
                            ResultSet rs2 = st2.executeQuery(sql2);

                            while(rs1.next()){          
                                rs1.deleteRow();
                                rs1.first();
                            }

                            while(rs2.next()){                                  
                                rs2.deleteRow();
                                rs2.first();
                            }

                            editorPane.setText("");
                        }catch(Exception e){e.printStackTrace();}