1. 샘플 코드

       List<String> myList = new ArrayList<String>();
        myList.add("j");
        myList.add("a");
        myList.add("v");
        myList.add("a");
        System.out.print("myArray=");
        String[] newArray = new String[myList.size()];
        for ( String s : newArray) {
            System.out.print(s+",");
        }
        myList.toArray(newArray);
        System.out.print("\nmyArray=");
        for ( String s : newArray) {
            System.out.print(s+",");
        }
        List<String> newList = new ArrayList<>(Arrays.asList(newArray));
        System.out.print("\nnewList=");
        for ( String s : newList) {
            System.out.print(s+",");
        }

2. 실행 결과

myArray=null,null,null,null,
myArray=j,a,v,a,
newList=j,a,v,a,