This example illustrates how to get the class name from its object. If you are aware of the java.lang.Class, it has methods for knowing the details of a class. One of the method defined in that class is Class.getName() which is useful for getting the name of the class. Note that, each instance has “class” variable which returns the java.lang.Class for that particular object. By using the getName() method, one could get the name of the class.
Lets look this example. This example used few sample classes and getting name of that classes.
GetObjectClassName
package javabeat.net.core; /** * Get Object's Class Name Example * * @author Krishna * */ public class GetObjectClassName { public static void main(String[] args) { Class<?> classVar = null; String str = "Test String"; classVar = str.getClass(); System.out.println("Class Name 1 : " + classVar.getName()); classVar = int.class; System.out.println("Class Name 2 : " + classVar.getName()); classVar = int[].class; System.out.println("Class Name 3 : " + classVar.getName()); classVar = Void.TYPE; System.out.println("Class Name 4 : " + classVar.getName()); classVar = Enum.class; System.out.println("Class Name 5 : " + classVar.getName()); } }
Output…
Class Name 1 : java.lang.String Class Name 2 : int Class Name 3 : [I Class Name 4 : void Class Name 5 : java.lang.Enum