var parentArray = [{ childName: 'John' }, { childName: 'Alice' }, { childName: 'Bob' }];

parentArray = [['childName', 'John'], ['childName', 'Alice'], ['childName', 'Bob']]

class Child {
    private String childName;

    public Child(String name) {
        this.childName = name;
    }

    public String getChildName() {
        return childName;
    }
}

Child[] parentArray = { new Child("John"), new Child("Alice"), new Child("Bob") };