构造方法中使用泛型

class A<T> {
    private T value;

    public A(T value) {
        this.value = value;
    }

    public T getValue() {
        return value;
    }

    public void setValue(T value) {
        this.value = value;
    }

}

public class GenericDemo01 {
    public static void main(String args[]){
        A<String>a = new A<String>("呵呵");
        System.out.println(a.getValue());
    }
}