how to find the class of an object java

To find the class of an object in Java, you can use the getClass() method from the Object class.

The getClass() method returns a Class object that represents the runtime class of the object. The Class object contains information about the object's class, including its name, fields, methods, and other metadata.

Here's an example of how to find the class of an object in Java:

String str = "Hello, world!";
Class cls = str.getClass();
System.out.println("The class of the object is " + cls.getName());

In the above example, a String object is created and stored in the str variable. The getClass() method is then called on the str object and the result is stored in the cls variable.

The getName() method is called on the cls object to get the name of the class as a String. The name of the class is then printed to the console.

In this example, the output will be "The class of the object is java.lang.String", since the object is an instance of the String class.

You can also use the isInstance() method from the Class object to check if an object is an instance of a specific class or a subclass of that class.

For example:

if (cls.isInstance(str)) {
  System.out.println("The object is an instance of the " + cls.getName() + " class");
}

In this example, the isInstance() method is called on the cls object and passed the str object as an argument. If the str object is an instance of the class represented by cls, the if statement is executed and a message is printed to the console.