Java program to create instances of singleton class and print hash codes
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Severity: 8192
Message: str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated
Filename: libraries/Filtered_db.php
Line Number: 23
total answers (1)
Program/Source Code:
The source code to create instances of singleton class and print hash codes is given below. The given program is compiled and executed successfully.
Output:
Explanation:
In the above program, we created a singleton class Singleton and public class Main. The Singleton class contains a constructor and method that returns the instance of the class.
The Main class contains a static method main(). The main() is an entry point for the program. And, created the instances obj1, obj2 and printed the hash code.
The hash code of all references of the Singleton class is the same because A singleton class is a class that can have only one object at a time.