In the program given below, we are creating an object of Student class using theclone()method. This method can be used if and only if at least one object of the class is already created. Also makes sure thatCloneableclass is implemented in a class. While calling theclone()method we requ...
When an object of class is created, the memory is allocated in the heap area to store instance variables. After the creation of an object,JVMproduces a unique reference number (address) for that object. This unique reference number is calledhash code number. This reference number is unique fo...
A deep copy is an alternative that solves this problem. Its advantage is thateach mutable object in the object graph is recursively copied. Since the copy isn’t dependent on any mutable object that was created earlier, it won’t get modified by accident like we saw with the shallow copy....
Here, arrayOfDifferentObject is an ArrayList that can hold objects of different types. We declared our ArrayList using the <Object> class in the syntax given below in code. In Java, ArrayList can hold objects of wrapper classes like double, integer, and string. We then add elements to the...
What is immutable class: A class is immutable if no method of the class can mutate its objects. For example, the String class is immutable. An immutable object cannot be modified once it is constructed. The information contained in immutable object is provided at the time of object creation ...
One way to get an estimate of an object’s size in Java is to use getObjectSize(Object) method of the Instrumentation interface introduced in Java 5. As we could see in Javadoc documentation, the method provides “implementation-specific approximation” of the specified object’s size...
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can make a deep copy of an object by using the Cloneable() interface and overriding the clone() method. Copy constructors are an easier and more flexible way of performing a deep copy. We can also use Serialization but we need to remember that its computation is expensive than other ...
Here is an example: function User(name, age) { this.name = name this.age = age } const user = new User('John Doe', 45) In the above User function, the this keyword refers to the object being created, so the name and age become the properties of the newly created object. This...
Our goal is to create a JSONobjectrepresenting some basic information. Let’s create an instance ofJSONObjectand populate it with key-value pairs: JSONObject obj =newJSONObject(); obj.put("Name","Crunchify.com"); obj.put("Author","App Shah"); ...