问 Scenario: We have a DataGridView which is attached to DataAdapter (datatable), we load the data in datatable using (adapter.fill(query, datatable)) in a separate thread (using delegate and beginInvoke) and once the data is loaded we attached that d
java.util.TimerTask类的执行周期period变量的声明如下: /** * Period in milliseconds for repeating tasks. A positive value indicates * fixed-rate execution. A negative value indicates fixed-delay execution. * A value of 0 indicates a non-repeating task. */ long peri