Assume we have a class with an array:

class MyClass {

     private int[] abc = new int[]{123, 456, 789};

}


Now, If we generate toString() method to this class, we will get:

    @Override
    public String toString() {
        return "MyClass{abc = " + abc + '}';
    }

and it will print something like: 

MyClass{abc=[I@12394f8}

I suggest to improve toString() method generation for arrays to use Arrays.toString() for generating String output for arrays. And our toString() method for the aforecited class will look like:

    @Override
    public String toString() {
        return "MyClass{abc = " + Arrays.toString(abc) + '}';
    }

and will produce more readable output:

MyClass{abc=[123, 456, 789]}