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Which class in Java is superclass of every other class?

Pragya Keshap answered on February 4, 2023 Popularity 7/10 Helpfulness 1/10

answer Which class in Java is superclass of every other class?

Which class in Java is superclass of every other class?

Comment

The Object class

A: The Object class, which is stored in the java. lang package, is the ultimate superclass of all Java classes (except for Object ).

class Employee implements Cloneable
{
   private String name;
   private int age;
   private Address address;

   Employee(String name, int age, Address address)
   {
      this.name = name;
      this.age = age;
      this.address = address;
   }

   @Override
   public Employee clone() throws CloneNotSupportedException
   {
      Employee e = (Employee) super.clone();
      e.address = address.clone();
      return e;
   }

   Address getAddress()
   {
      return address;
   }

   String getName()
   {
      return name;
   }

   int getAge()
   {
      return age;
   }
}

class Address
{
   private String city;

   Address(String city)
   {
      this.city = city;
   }

   @Override
   public Address clone()
   {
      return new Address(new String(city));
   }

   String getCity()
   {
      return city;
   }

   void setCity(String city)
   {
      this.city = city;
   }
}

public class CloneDemo
{
   public static void main(String[] args) throws CloneNotSupportedException
   {
      Employee e = new Employee("John Doe", 49, new Address("Denver"));
      System.out.printf("%s: %d: %s%n", e.getName(), e.getAge(), 
                        e.getAddress().getCity());
      Employee e2 = (Employee) e.clone();
      System.out.printf("%s: %d: %s%n", e2.getName(), e2.getAge(), 
                        e2.getAddress().getCity());
      e.getAddress().setCity("Chicago");
      System.out.printf("%s: %d: %s%n", e.getName(), e.getAge(), 
                        e.getAddress().getCity());
      System.out.printf("%s: %d: %s%n", e2.getName(), e2.getAge(), 
                        e2.getAddress().getCity());
   }
}

https://www.infoworld.com/article/2105982/core-java-java-qanda-the-ultimate-superclass-part-1.html#:~:text=A%3A%20The%20Object%20class%2C%20which,classes%20(except%20for%20Object%20).

Popularity 7/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: class java superclass

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Contributed on Feb 04 2023

Pragya Keshap

0 Answers Avg Quality 2/10

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