Collections and Generics

Question : 17 of 53

Marks: +1, -0

Given:

1. /* insert code here*/
2. private N min, max;
3. public N getMin() { return min; }
4. public N getMax() { return max; }
5. public void add(N added) {
6.   if (min == null || added.doubleValue() < min.doubleValue()) 
7.   min = added;
8.   if (max == null || added.doubleValue() > max.doubleValue()) 
9.   max = added;
10. }
11. }

Which two, inserted at line 1, will allow the code to compile? (Choose two.)

public class MinMax < ? > {
public class MinMax < ? extends Number > {
public class MinMax < N extends Object > {
public class MinMax < N extends Number > {
public class MinMax < ? extends Object > {
public class MinMax < N extends Integer > {

Validate

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