Duplicating words

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Let's write an echo program. It repeats everything it hears. More precisely, everything in a list of 10 strings. The echo program will actually accomplish this by creating a list of 10 words (we'll enter strings from the keyboard and add them to the list), and the doubleValues method will basically duplicate the words in a specific way. Then we'll display the resulting echo. Piece of cake.

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Xavi Martin

Level 22

Expert

25 October 2022, 07:24

Again, the statement does not clearly explain what to do. you have to be imaginative.

Chloe

Level 13 , Alhambra, United States

26 October 2021, 02:58

do not forget to put list.size(); outside the for loop.

ImDevin

Level 15 , Old Town, United States

21 April 2021, 14:20

I guess it's always a good habit to just use .size(), rather than hard coding a number. :)

Richard Davies Java Developer

11 April 2021, 03:28

I had exactly what was required but it didn't want to pass testing. They require you to declare another ArrayList within the DoubleValues method. Seems a bit pointless when parsing in the ArrayList list. I even tried doing it this way before giving-up and looking at the answer. But still no-good.

Jurij Thmsn

Level 29 , Flensburg, Germany

12 January 2021, 14:01

Check for: "Be sure that the doubleValues method can work with lists of any length, not just 10." wasted one attempt on this ;)

Nickolas Johnson

Level 8 , St. Louis, United States of America

30 March 2020, 13:16

I really did not expect list.size() to change dynamically. I figured once the for statement is set, the size is set but apparently it re-evaluates the size every iteration. So, you can start out with a size of 10 and it increases each time the for loop iterates if you're adding to the list.

Andrei

Level 41

27 October 2020, 10:09

Someone did not read carefully about ArrayList when Ellie taught it! haha! :D

Miha Čelešnik

Level 9 , Ilirska Bistrica, Slovenia

20 November 2019, 13:13

There is no need for method doubleValues to have return value, just use reference to original list and compute index instead of making whole new list.

Bhakti

Level 10 , Sydney, Australia

6 November 2019, 03:27

getting correct output but validation fails.Please help.

public static ArrayList<String> doubleValues(ArrayList<String> list) {
        //write your code here
        for(int i = 0;i< 20;i++)
        ...
    }

Roman

Level 41

6 November 2019, 06:51

You have received this recommendation: "Be sure that the doubleValues method can work with lists of any length, not just 10."

SUSHANT

Level 10 , Delhi, India

7 July 2019, 07:54

Can someone tell why is it showing "cannot resolve symbol list"?

Roman

Level 41

8 July 2019, 05:42

Declare a string list variable and immediately initialize it. Have you done it before line 16?

Edddieg

Level 15 , Providence, United States

22 June 2020, 01:19

I have an issue with "Declare a string list variable and immediately initialize it". please , I declared the variable but its not passing please help ...