Java中的变量类型

Question

Is there a way to get the type of variable in java ? ? my goal is to define If the variable is int or String

There is a way I tried to use before but it didn't work with int . It is just for String

This is code :

String a="121212aa";
System.out.println(a.getClass().isInstance(a));

a now is String and the result will be java.lang.String .

i need to check also if it's int because if I use Boolean with else in it maybe the input is double

Answer 1

In Java there are primitive and reference types.

Primitive types are boxed into wrapper types. You should check against the proper wrapper type , eg:

Object i = 1;
i.getClass(); // will return java.lang.Integer