Can't get Vaadin grid examples to compile

Flow
1

Hi

I’m following https://vaadin.com/components/vaadin-grid/java-examples/using-components but can’t get past the line:


// Use the component constructor that accepts an item ->
// new PersonComponent(Person person)
grid.addComponentColumn(PersonComponent::new).setHeader("Person");

**

Error:(121, 38) java: incompatible types: invalid constructor reference
incompatible types: java.lang.Object cannot be converted to Person

**

Have anyone else this problem or does the demos work for you?

2

Hi.

Are you using the Grid as Grid<Person> and did you copy the objects from the bottom of https://vaadin.com/components/vaadin-grid/java-examples # Grid example model (Person and Address)

Next you would want to copy the objects PersonComponent and PersonCard from the https://vaadin.com/components/vaadin-grid/java-examples/using-components

By doing these steps the only thing that’s not there for me is: createItems()
This method only creates a List of 500 Person beans.

  • Mikael
3

Hi Mikael,
I have my own Person object. It looks the same but without “static” as my JDK8 environment didn’t allow it…

4

Yes the static needs to be dropped if it’s in its own file.
The static is there as for the demo it is a nested class inside the Demo class.

  • Mikael