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Author Question: Analyze the following code.import java.util.*;public class Test { public static void main(String[] ... (Read 100 times)

bobbysung

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  • Posts: 519

Question 1

Which of the following is correct to perform the set intersection of two sets s1 and s2?
◦ s1.join(s2)
◦ s1.intersection(s2)
◦ s1.intersect(s2)
◦ s1.retainAll(s2)

Question 2

Analyze the following code.

import java.util.*;

public class Test {
public static void main(String[] args) throws Exception {
Set set = new TreeSet();

set.add("Red");
set.add("Green");
set.add("Blue");

System.out.println(set.first());
}
}

◦ The program displays Blue
◦ The program may display Red, Blue, or Green.
◦ The program displays Red
◦ The program displays Green
◦ The program cannot compile, because the first() method is not defined in Set.


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Marked as best answer by bobbysung on May 6, 2020

memslove

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bobbysung

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  • Posts: 519
Reply 2 on: May 6, 2020
Gracias!


nguyenhoanhat

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  • Posts: 332
Reply 3 on: Yesterday
Great answer, keep it coming :)

 

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