is Jlist Override the List automatic? (bug)?

Question

I hope I will get help, I will ask as general question:

I am using a JList, and due to the JList not have a (value,text) (so I can display te

Answer 1

I am using a JList, and due to the JList not have a (value,text) (so I can display text and use the value in my code)

It's really hard to understand your problem, but I "suspect" for the quoted line that you have a missunderstanding between JList model and text displayed by the JList itself. I think that's why you have a separate List.

The model can contain any object you want and the JList can also display a text as you want regardless the object itself. This last task is done by a ListCellRenderer. Take a look to Writing a Custom Cell Renderer

For instance you can have this class:

class Person {    
    String lastName;
    String name;

    public Person(String lastName, String name){
        this.lastName = lastName;
        this.name = name;
    }

    public String getLastName(){
        return this.lastName;
    }

    public String getName(){
        return this.name;
    }
}

Now you want your JList keep Person objects to work with them later. This part is easy just create a ListModel and add elements into it:

DefaultListModel model = new DefaultListModel();
model.addElement(new Person("Lennon","John"));
model.addElement(new Person("Harrison","George"));
model.addElement(new Person("McCartney","Paul"));
model.addElement(new Person("Starr","Ringo"));

But you want to display the name and last name of each Person. Well you can implement your own ListCellRenderer to do this:

JList list = new JList(model);
list.setCellRenderer(new DefaultListCellRenderer(){
    @Override
    public Component getListCellRendererComponent(JList list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
        super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);
        if(value instanceof Person){
            Person person = (Person)value;
            setText(person.getName() + " " + person.getLastName());
        }
        return this;
    }
});

And your JList will show the items as you want: