How to convert an array to an ArrayList without warnings/errors?

Question

So, I have a bit of a problem. I'm trying to convert an array of integers (called list) to an ArrayList (called arrList). The code shown below works fine:

java.util.ArrayList arrList = new java.util.ArrayList(Arrays.asList(list));

However, when compiled there is one warning: the line above is reported as using "unchecked or unsafe operations."

Unfortunately, I cannot seem to dispose of this warning. Since this is a homework assignment, part of the criteria is to be warning-free. Is there any way I could convert the array to an ArrayList without warnings/errors?

Answer 1

Ensure you are using the correct "Arrays" import. By default, my Eclipse will try to import "edu.emory.mathcs.backport.java.util". Make sure it is just the standard "java.util" version and you should do something like:

    String[] arr = new String[]{"one", "two", "three"};
    List<String> list = Arrays.asList(arr);

Answer 2

Collections.addAll(targetList, sourceArray); 

Try the above solution. It should work