泛型类定义:

public class BoxGeneri<E> { private E name; public BoxGeneri() { } public BoxGeneri(E name) { this.name = name; } public E getName() { return name; } public void setName(E name) { this.name = name; } } public class GeneriTest { public static void main(String[] args) { BoxGeneri<String> b = new BoxGeneri<>(); b.setName("box"); System.out.println(b.getName()); } }