在javafx中可变地设置Dialog的ContentText

Question

For the user to confirm some changes I want a confirmation dialog to pop up, asking whether the selected Objects shall be deleted. This is variable of course. The Text in the confirmation dialog should look like this:

Are you sure you want to delete   
Sample 1 from class 2  
Sample 3 from class 1  
Sample... and so on  
?

I have an ArrayList of Objects in which the information about samplename and class are stored. What I got so far is:

ObservableList<Samples> samples = table.getSelectionModel().getSelectedItems();
Alert info = new Alert(Alert.AlertType.CONFIRMATION);
info.setHeaderText("Confirm deletion");

if (samples.size() > 1) {
    List<String> strings= new ArrayList<>();
    samples.forEach(e ->
          strings.add(e.getSample().getSampleNr() +
                  " of class " +
                   e.getSample().getClass() +"\n")
            );
info.setContentText("Are you sure you want to delete \n" +
                    stridon't+ "?"
);

I dont know, maybe my thinking is blocked but I can't get it to work nicely. It displays like this:

Are you sure you want to delete  
[Sample 1 of class 3  
, Sample 3 of class 1  
, ..and so on  
]?

Does anyone know how to get rid of the [,] signs or maybe a nicer way o do this? thank you in advance!

Answer 1

您可以使用的一件事是String.join() 。

String.join("delimiterHere", listHere); 

info.setContentText("Are you sure you want to delete \n" + String.join("\n", strings) + "?");

Answer 2

Another thing you can do is use a string builder

StringBuilder stringBuilder = new StringBuilder("Are you sure you want to delete \n");
samples.forEach(e ->
        stringBuilder.append(e.getSample().getSampleNr())
                .append(" of class ")
                .append(e.getSample().getClass())
                .append("\n"));

info.setContentText(stringBuilder.toString());

Test Output:(Sample Data)

Are you sure you want to delete
Sample 0 of class Class 0
Sample 1 of class Class 1