Print arrays in Java

I'm writing a method to print every object it passes By calling object The toString () method works, but not for arrays I can use object getClass(). The isarray () method finds out if it is an array, but I don't know how to convert it

int[] a;
Integer[] b;

Object aObject = a;
Object bObject = b;

// this wouldn't work
System.out.println(Arrays.toString(aObject));
System.out.println(Arrays.toString(bObject));

Solution

If you don't know the type, you can cast the object to object [] and print it like this (make sure it is indeed an array and can be converted to object []) If it is not an instance of object [], first create an object [], and then print:

private void printAnyArray(Object aObject) {
    if (aObject.getClass().isArray()) {
        if (aObject instanceof Object[]) // can we cast to Object[]
            System.out.println(Arrays.toString((Object[]) aObject));
        else {  // we can't cast to Object[] - case of primitive arrays
            int length = Array.getLength(aObject);
            Object[] objArr = new Object[length];
            for (int i=0; i<length; i++)
                objArr[i] =  Array.get(aObject,i);
            System.out.println(Arrays.toString(objArr));
        }
    }
}

Test:

printAnyArray(new int[]{1,4,9,16,25});
printAnyArray(new String[]{"foo","bar","baz"});

OUTPUT：

[1,25]
[foo,bar,baz]