I’m encountering a IllegalArgumentException when trying to display a set of data in my Tree component. I have multiple classes which have attributes inside them and I’m trying to list them in an following hierarchical design:
- Root class 1
[list]
- class 2
[list]
- class 3
[list]
- class 4
[/list]
[/list]
[/list] - Root class 1
[list]
- class 2
[list]
- class 3
[list]
- class 4
[/list]
[/list]
[/list]
etc.
The problem here is, that to achieve this, I am at the moment using Tree and TreeData to display them. This causes a problem, because I can’t add item that has the same content when it is a string. Let me elaborate a bit: I have a class 3 that has a name value, which is the name of a system. Now I have 4 devices that I want to list. Two of them has a system named Windows, for example. Now when I try to list them, I get the error stated above, hence the HashCode is the same, coz the hashcode is calculated by the content of the String. And I am forced to use string because I have no other idea how to display from several classes, since you can only set one TreeData<> and Tree<>.
I’d be delighted to get help. I can provide code, but it is a mess since it is quite vast. Basically, I’m creating the Tree items with for loops that go through a List element where I’ve looked up data I want to show from my database. Nothing too complicated tbh.
Help, please!