instanceof operator and isInstance() method both are used for checking the class of the object. But main difference comes when we want to check the class of object dynamically. In this case isInstance() method will work. There is no way we can do this by instanceof operator.
instanceof operator and isInstance() method both return a boolean value. isInstance() method is a method of class Class in java while instanceof is a operator.
Consider an example:
Now if we want to check the class of the object at run time, then we must use isInstance() method.
true false true
NOTE: instanceof operator throws compile time error(Incompatible conditional operand types) if we check object with other classes which it doesn’t instantiate.
13: error: incompatible types: Integer cannot be converted to String System.out.println(i instanceof String); ^
This article is contributed by Gaurav Miglani. If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to email@example.com. See your article appearing on the GeeksforGeeks main page and help other Geeks.
Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.
Don’t stop now and take your learning to the next level. Learn all the important concepts of Data Structures and Algorithms with the help of the most trusted course: DSA Self Paced. Become industry ready at a student-friendly price.
- Java.util.BitSet class methods in Java with Examples | Set 2
- Shadowing of static functions in Java
- How does default virtual behavior differ in C++ and Java ?
- How are Java objects stored in memory?
- How are parameters passed in Java?
- Are static local variables allowed in Java?
- final variables in Java
- Default constructor in Java
- Assigning values to static final variables in Java
- Comparison of Exception Handling in C++ and Java
- Does Java support goto?
- Arrays in Java
- Inheritance and constructors in Java
- More restrictive access to a derived class method in Java
- Comparison of static keyword in C++ and Java
- Static blocks in Java
- Access specifiers for classes or interfaces in Java
- java.lang.Character class methods | Set 1
- Comparison of Inheritance in C++ and Java
- Output of Java Program | Set 1
Improved By : _tanyajain