Given:
class Book {
int id;
String name;
public Book (int id, String name) {
this.id = id;
this.name = name;
}
public boolean equals (Object obj) { //line n1
boolean output = false;
Book b = (Book) obj;
if (this.id = = b.id) {
output = true;
}
return output;
}
}
and the code fragment:
Book b1 = new Book (101, "Java Programing");
Book b2 = new Book (102, "Java Programing");
System.out.println (b1.equals(b2)); //line n2
Which statement is true?
The program prints false because the equals method compares the id fields of the two Book objects. In this case, b1 has id 101 and b2 has id 102, which are not equal. Therefore, the equals method returns false.
Agree and tested
B is correct.
Totally FALSE, the equals() method just compare the id -> false -> B is correct
B, tested class Book { int id; String name; public Book (int id, String name) { this.id = id; this.name = name; } public boolean equals (Object obj) { //line n1 boolean output = false; Book b = (Book) obj; if (this.id == b.id) { output = true; } return output; } } public class Question182 { public static void main(String[] args) { Book b1 = new Book (101, "Java Programing"); Book b2 = new Book (102, "Java Programing"); System.out.println (b1.equals(b2)); //line n2 } }