Java中如何创建泛型类呢？

实现思路:
    在类后面使用<T>
    则T代表泛型的类型

package com.java265;

public class GenericMachine {
    private final T engine;

    public GenericMachine(T engine) {
        this.engine = engine;
    }

    public static void main(String[] args) {
        GenericMachine machine = new GenericMachine<>(new DieselEngine());
        machine.start();

        GenericMachine anotherMachine = new GenericMachine<>(new JetEngine());
        anotherMachine.start();
    }

    private void start() {
        System.out.println(engine);
    }
}