Question

How can I sort a string array?

I have the array

String [] words = {apple, null, banana, orange};

which needs to be sorted to be "apple, banana, orange, null."

How do I sort so the strings are all on the left, and null is on the right?

Answer 1

public class SortStrings {

    public static void sortStrings(String[] arr) {
        String temp;
        for (int i = 0; i < arr.length; ++i) {
            for (int j = 0; j < arr.length - 1; ++j) {
                if (arr[j] == null || (arr[j + 1] != null && arr[j].compareTo(arr[j + 1]) > 0)) {
                    temp = arr[j];
                    arr[j] = arr[j + 1];
                    arr[j + 1] = temp;
                }
            }
        }
    }

    public static void main(String[] args) {
        String[] words = {"apple", null, "banana", "orange"};
        sortStrings(words);
        for (int i = 0; i < words.length; i++) {
            System.out.println(words[i]);
        }
    }
}

apple banana orange null Process finished with exit code o