add the next data row into an example table

Hello,
how can I insert the next data row into an existing example table?

MemoryExampleTable table = new MemoryExampleTable(myAttributes);
DoubleArrayDataRow dataRow = new DoubleArrayDataRow(data);

		table.addDataRow(dataRow);
	   
		ExampleSet examSet = table.createExampleSet();

this write one row of the values of the attributes into my example table. When I run this the second time, this data row is overwritten by a current data row. How can I add the second data row into an existing example table?

Thank for your answer