See if field exists in class

java

Solution

Your compiler usually knows that pretty well, and the runtime lets you examine loaded classes with reflection.

Object someObject = ...
Class<?> someClass = someObject.getClass();
Field someField = someClass.getField("foo");

The `getField()` method will throw an exception if the field can not be found.

Problem

I have a class with various variables ``` public class myClass{ public int id; public String category; public String description; public String start; public String end; } ``` Is there a way to check, either by creating an internal function or checking from the calling object, whether or not a variable exists? E.g. To check whether myClass contains a variable called "category" (it does). Or whether it contains a category called "foo" (it does not).

Original source