when write this code display error
no interface expected here public static class MyCoGrouper extends
CoGroupFunction<Customer,Orders,Result> {
ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Customer> customers = getCustomerDataSet(env,mask,l,map);
DataSet<Orders> orders= getOrdersDataSet(env,maskorder,l1,maporder);
DataSet<Result> result =
customers.coGroup(orders).where(0).equalTo(1).with
(new CoGroupFunction<Customer,Orders,Result>() {
@Override
public void coGroup(Iterator<Customer> leftElements,
Iterator<Orders> rightElements,
Collector<Result> out) throws Exception {
if(rightElements.hasNext()) {
while(leftElements.hasNext()) {
out.collect(new
Result(leftElements.next().f0,leftElements.next().f1,rightElements.next().f0
,rightElements.next().f1,rightElements.next().f2));
}
}
}
});
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