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import java.util.ArrayList;

import java.util.List;

/**

* Created by riven_chris on 15/7/6.

*/

public class TupleTest2 {

static TwoTuple<String, Integer> f() {

return Tuple.tuple("hi", 47);

}

static TwoTuple f2() {

return Tuple.tuple("hi", 47);

}

public static void main(String[] args) {

System.out.println(f());

System.out.println(f2());

TwoTuple<String, Integer> f2 = f2();

System.out.println(f2.first);

List<Integer> list = new ArrayList<Integer>();

list.add(1);

List<? extends Tuple> list2 = new ArrayList<Tuple>();

list2.add(null);

}

}