Question

this is my code, Control is an swt-ui-widget, the method find should return a component with the type passed in “clazz”. I know how to do this with static methods, but it doesn’t work if it’s an instance method.

package org.uilib.swt.templating;

import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Control;

public class Component<T extends Control> {

    public final String name;
    public final T control;

    public Component(String name, T control) {
        this.name = name;
        this.control = control;
    }

    public String getName() {
        return name;
    }

    public T getControl() {
        return control;
    }

    public Component<E> find(String query, Class<E extends Control> clazz) {

        return null;
    }
}

i want to do the following:

Component<Button> x = this.find("asd", Button.class);

Answer 1

As far as I understand, you need the following generic method:

public <E extends Control> Component<E> find(String query, Class<E> clazz) { ... }