Проверьте экземпляр Java

// instanceof Checks whether object is instance of a given class
Object obj = new String("Hello World!");
// obj is instance of String and as such first msg is printed out		
if(obj instanceof String) {
	System.out.println(obj + " is instance of String class"); // This msg is printed
} else {
	System.out.println(obj + " is not instance of String class");
}
Wissam