Mega Code Archive
0224 Objects
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Java java.util.Objects class consists of class methods for operating on objects. java.util.Objects utilities include null-safe or null-tolerant methods for
comparing two objects,
computing the hash code of an object,
requiring that a reference not be null,
returning a string for an object.
System.out.println("Objects.deepEquals(x, y): "+Objects.deepEquals(x, y)); // true
import java.util.Objects;
class Employee {
private String firstName, lastName;
Employee(String firstName, String lastName) {
firstName = Objects.requireNonNull(firstName);
lastName = Objects.requireNonNull(lastName, "lastName shouldn't be null");
lastName = Character.toUpperCase(lastName.charAt(0)) + lastName.substring(1);
this.firstName = firstName;
this.lastName = lastName;
}
String getName() {
return firstName + " " + lastName;
}
public static void main(String[] args) {
Employee e1 = new Employee(null, "A");
Employee e2 = new Employee("B", null);
Employee e3 = new Employee("C", "D");
System.out.println(e3.getName());
}
}
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