SCJP Module-9 Question-22

The sample code given below will test your understanding of reversing the ArrayList object using the Collection Interface.

 
 

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SCJP Module-9 Question-22

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The sample code given below will test your understanding of reversing the ArrayList object using the Collection Interface.

Given below the sample code :

import java.util.*;
public class reverseLIst {
public static void main(String[] args) {
ArrayList<String> mylist = new ArrayList<String>();
mylist.add("1");
mylist.add("2");
mylist.add("3");
System.out.println("Before reversing array list:"+mylist);
Collections.reverse(mylist);
System.out.println("After reversing array list:"+mylist);
}
}

What will be the output of the above code ?

1. Compilation error

2. No output

3. Before reversing array list:[1, 2, 3]
    After reversing array list:[3, 2, 1]

4. Before reversing array list:[1, 2, 3]
    After reversing array list:[1, 2, 3]

Answer

(3)

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