java 统一输入泛型类型

class Info<T>{
        private T var;
        public T getVar(){
            return var;
    }
        public void setVar(T var){
            this.var=var;
        }
        public String toString(){
            return this.var.toString();
        }
}
public class GenericsDemo {
    public static void main(String[] args) {
        Info<String> i1=new Info<String>();
        Info<String> i2=new Info<String>();
        i1.setVar("hello");
        i2.setVar("LiXinghua");
        add(i1,i2);
    }
    public static <T> void add(Info<T> i1,Info<T> i2){
        System.out.println(i1.getVar()+" "+i2.getVar());
    }
}