Java how to compare unordered string arrays [duplicate]

Just sort them both and iterate over the elements to compare them all:

public boolean compareStringArrays(String[] arr1, String[] arr2) {
    if (arr1.length != arr2.length)
        return false;
    
    String[] arr1Copy = arr1.clone();
    String[] arr2Copy = arr2.clone();
  
    Arrays.sort(arr1Copy);
    Arrays.sort(arr2Copy);
    for (int i=0; i<arr1Copy.length; i++) {
        if (!arr1Copy[i].equals(arr2Copy[i]))
            return false;
    }
    return true;
}

Note that I make copies of the arrays here so the original order of the arrays passed in is preserved. There's also an optimisation to check the lengths are the same first, as if one array has more elements than the other they are not equal.

EDIT

you can also use assertArrayEquals() instead of a for loop, but the copy with the separate variables is still necessary because the sort method is a void function

String[] arr1Copy = arr1.clone();
String[] arr2Copy = arr2.clone();
  
Arrays.sort(arr1Copy);
Arrays.sort(arr2Copy);
assertArrayEquals(arr1Copy, arr2Copy);

ArrayList<String> arrList1 = new ArrayList<>(Arrays.asList(arr1));
ArrayList<String> arrList2 = new ArrayList<>(Arrays.asList(arr2));
Collections.sort(arrList1);
Collections.sort(arrList2);
if (Arrays.equals(arrList1.toArray(), arrList2.toArray())) {
//They have exactly the same elements
}

EDIT: Old answer:

ArrayList<String> arrList1 = new ArrayList<>(Arrays.asList(arr1));
ArrayList<String> arrList2 = new ArrayList<>(Arrays.asList(arr2));
if (arrList1.containsAll(arrList2) && arrList2.containsAll(arrList1)) {
//They have the same elements, not necessarily the same number
}

The top answer will tell you if they both contain the same elements, as well as if they have the same number, Bottom answer will tell you if they both have the same elements, but doesn't tell you if any elements are duplicated

EDIT again: Firstly I posted:

if (arrList1.containsAll(arrList2) && arrList2.containsAll(arrList1)
         && arrList1.size() == arrList2.size())

Checking the size is equal is redundant, since if we have the lists:

Cat
Cat
Dog

and

Cat
Dog
Dog

The expression would evaluate to true, but they do not have exactly the same elements

Here is the method:

public boolean compareArray(){
        boolean isSameArray=false;
        String[] arr1={"Dog","Cat","Mouse","Chicken"};
        String[] arr2={"Cat","Dog","Mouse","Chicken"};
        Arrays.sort(arr1);
        Arrays.sort(arr2);

        if(Arrays.equals(arr1, arr2)){
            isSameArray=true;
        }else{
            isSameArray=false;
        }
        return isSameArray;
    }

That is very easy. Just do like this:

ArrayList<String> firstArray=new ArrayList<>();
ArrayList<String> secondArray=new ArrayList<>();

firstArray.add("Dog");
firstArray.add("Cat");
firstArray.add("Mouse");
firstArray.add("Chicken");

secondArray.add("Cat");
secondArray.add("Dog");
secondArray.add("Mouse");
secondArray.add("Chicken");

boolean areEqual=firstArray.containsAll(secondArray);

if(areEqual)
  System.out.println("Voila!");
else
  System.out.println("Oppps!");

May ways how to do that - probably the best way is to make sort and compare Arrays like Collections(Arrays.sort(arrayToSort)), objects (Arrays.equals(arr1,arr2)) - another way is just iterate over 1st and 2nd array and try to find items one by one (bad idea, not such effective, but good to understand and explain)- something like following:

    String[] arr1={"Dog","Cat","Mouse","Chicken"};
    //String[] arr2={"Dog","Mouse","Chicken"};       //FALSE
    String[] arr2={"Cat","Dog","Mouse","Chicken"}; //TRUE

    boolean foundAll = true;

    if(arr1.length != arr2.length){
        foundAll = false;
    }else{
        for (int i = 0; i < arr1.length; i++) {
            boolean foundActual = false;
            for (int j = 0; j < arr2.length; j++) {
                if(arr1[i].equals(arr2[j])){
                    foundActual = true;
                    break;
                }
                System.out.println("arr1 elem: " + arr1[i] + " arr2 elem: "+ arr2[j]);
            }
            System.out.println("\n");
            if(!foundActual){
                foundAll = false;
                break;
            }

        }
    }
    System.out.println("found all: " + foundAll);
}

String arr1[] = {//your content goes here};
String arr2[] = {//your content goes here};

Arrays.sort(arr1);
Arrays.sort(arr2);

if(arr1.length != arr2.length){
   retrn false;
}else{
    boolean isSimilar = true;
    for(int i=0; i< arr1.length; i++){
         if(!(arr1[i].equals(arr2[i]))){
            isSimilar = false;
         }
    }
} 
return isSimilar;