ind the output of the below Java program?class Student { int id; Student(int id) { this.id = id; }}public class Test { public static void main(String[] args) { Student s1 = new Student(1001); System.out.println(s1.equals(null)); }}A) trueB) falseC) errorD) Exception
Question
ind the output of the below Java program?class Student { int id; Student(int id) { this.id = id; }}public class Test { public static void main(String[] args) { Student s1 = new Student(1001); System.out.println(s1.equals(null)); }}A) trueB) falseC) errorD) Exception
Solution
The output of the Java program will be "false".
Here's the step by step explanation:
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A class named "Student" is created with an integer variable "id".
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A constructor for the "Student" class is defined which takes an integer argument. This constructor sets the "id" of the "Student" object to the passed integer.
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In the main method of the "Test" class, a new "Student" object "s1" is created with the "id" of 1001.
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The equals() method is called on the "s1" object with null as the argument. The equals() method checks if the object referred by "s1" is the same as the object referred by null.
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Since "s1" is referring to a "Student" object and null is not referring to any object, the equals() method returns false.
So, the correct answer is B) false.
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