public class Person{ int age; String name; public Person(String n, int a){ age = a; name = n; } public String toString(){ return (name+ ":" + age ); } } public class Employee extends Person implements Cloneable { public Employee(String n, int a){ super(n, a); } public Employee clone()throws CloneNotSupportedException{ return (Employee)super.clone(); } } public class Test { public static void main(String[] args) { Employee[] e1 = {new Employee("Hari",30), new Employee("geeta",23)}; Employee[] e2 = e1.clone(); e2[1].name = "rani"; System.out.println(e1[1] + ", " + e2[1]); } }
Question
public class Person{ int age; String name; public Person(String n, int a){ age = a; name = n; } public String toString(){ return (name+ ":" + age ); } } public class Employee extends Person implements Cloneable { public Employee(String n, int a){ super(n, a); } public Employee clone()throws CloneNotSupportedException{ return (Employee)super.clone(); } } public class Test { public static void main(String[] args) { Employee[] e1 = {new Employee("Hari",30), new Employee("geeta",23)}; Employee[] e2 = e1.clone(); e2[1].name = "rani"; System.out.println(e1[1] + ", " + e2[1]); } }
Solution
The given code is written in Java.
Step 1: Define a class named "Person" with two instance variables: "age" of type int and "name" of type String. The class has a constructor that takes two parameters, "n" of type String and "a" of type int, and assigns the values of these parameters to the instance variables.
Step 2: The class "Person" has a method named "toString()" which returns a String representation of the object. In this case, it returns the concatenation of the "name" and "age" variables, separated by a colon.
Step 3: Define a class named "Employee" which extends the "Person" class and implements the "Cloneable" interface. The "Employee" class has a constructor that takes two parameters, "n" of type String and "a" of type int. It calls the superclass constructor using the "super" keyword to initialize the "name" and "age" variables.
Step 4: The "Employee" class overrides the "clone()" method from the "Cloneable" interface. It calls the "clone()" method of the superclass using the "super" keyword and casts the result to an "Employee" object.
Step 5: Define a class named "Test" which contains the "main" method.
Step 6: Inside the "main" method, create an array of "Employee" objects named "e1" with two elements. The first element is initialized with the values "Hari" and 30, and the second element is initialized with the values "geeta" and 23.
Step 7: Create a new array of "Employee" objects named "e2" and assign it the value of "e1.clone()". This creates a shallow copy of the "e1" array.
Step 8: Modify the "name" variable of the second element in the "e2" array to "rani".
Step 9: Print the "name" and "age" of the second element in both the "e1" and "e2" arrays using the "System.out.println()" method.
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