Question

(intro to java help?)

Write a method manyStrings that takes an ArrayList of Strings and an integer n as parameters and that replaces every String in the original list with n of that String. For example, suppose that an ArrayList called "list" contains the following values:

("squid", "octopus")

And you make the following call:

manyStrings(list, 2);

Then list should store the following values after the call:

("squid", "squid", "octopus", "octopus")

As another example, suppose that list contains the following:

("a", "a", "b", "c")

and you make the following call:

manyStrings(list, 3);

Then list should store the following values after the call:

("a", "a", "a", "a", "a", "a", "b", "b", "b", "c", "c", "c")

You may assume that the ArrayList you are passed contains only Strings and that the integer n is greater than 0.

Answer 1

ManyStringsTest.java

import java.util.ArrayList;

public class ManyStringsTest {

public static void main(String[] args) {

ArrayList<String> list = new ArrayList<String>();

list.add("squid");

list.add("octopus");

manyStrings(list, 2);

System.out.println(list);

}

public static void manyStrings (ArrayList<String> list, int n) {

for(int i=0;i<list.size();i++){

for(int j=1;j<n;j++){

list.add(i,list.get(i));

}

i+=n-1;

}

}

}

Output:

[squid, squid, octopus, octopus]