How to identify object types in java [duplicate]

Question

Possible Duplicate:
How to determine an object's class (in Java)?
Java determine which class an object is

I have following sample incomplete method to compare the object type of a given object

public void test(Object value) {          if (value.getClass() == Integer) {             System.out.println("This is an Integer");         }else if(value.getClass() == String){             System.out.println("This is a String");         }else if(value.getClass() == Float){             System.out.println("This is a Float");         }  } 

The method can be called as:

test("Test"); test(12); test(10.5f); 

this method is not actually working, please help me to make it work

Answer 1

You forgot the .class:

if (value.getClass() == Integer.class) {     System.out.println("This is an Integer"); }  else if (value.getClass() == String.class) {     System.out.println("This is a String"); } else if (value.getClass() == Float.class) {     System.out.println("This is a Float"); } 

Note that this kind of code is usually the sign of a poor OO design.

Also note that comparing the class of an object with a class and using instanceof is not the same thing. For example:

"foo".getClass() == Object.class 

is false, whereas

"foo" instanceof Object 

is true.

Whether one or the other must be used depends on your requirements.