What are non primitive data types in java w3schools
What are non primitive data types in java w3schools
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According to W3Schools, a non-primitive data type in Java is an object that represents a complex piece of data. Non-primitive data types are also known as reference types or objects.
Here's the list of non-primitive data types in Java:
Class: A class is a blueprint for creating objects. It defines the properties and behaviors of an object. Interface: An interface is a collection of abstract methods that must be implemented by any class that implements it. Array: An array is a fixed-size, homogeneous collection of elements that can be accessed by their index. ArrayList: An ArrayList is a resizable-array implementation of the List interface. LinkedList: A LinkedList is a linear data structure where elements are stored in a sequence. HashMap: A HashMap is an unordered collection of key-value pairs. HashSet: A HashSet is an unordered collection of unique elements. TreeSet: A TreeSet is a sorted, unordered collection of unique elements. TreeMap: A TreeMap is a sorted, ordered map that maps keys to values.Non-primitive data types are created using the new keyword and can be reused by assigning them to different variables. This makes them more efficient than primitive data types in terms of memory usage.
Here's an example:
String name = "John";
Person person = new Person("John", 30);
In this example, a string literal is created for the value "John". A Person object is also created with the same values. Both the string and the Person object can be reused by assigning them to different variables.
Non-primitive data types have their own set of methods and properties that can be used to manipulate and access their contents. For example, a String has methods like toString(), length(), and substring() that can be used to work with the string.
In conclusion, non-primitive data types in Java are objects that represent complex pieces of data. They have their own set of methods and properties that make them more efficient and flexible than primitive data types.
What are non primitive data types in java javatpoint
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In Java, primitive data types are the fundamental building blocks of the language and include:
boolean byte char
short int long float double
These primitive data types have a fixed size in memory (usually 16, 32, or 64 bits), and the operations that can be performed on them are limited to basic arithmetic, comparison, and logical operators.
On the other hand, non-primitive data types in Java are known as reference data types or object-oriented data types. These include:
String: a sequence of characters that is immutable (cannot be changed once it's created). Array: a collection of elements of the same type. Class (also referred to as Object): represents a class or interface in Java. Interface: defines a set of methods without providing any implementation.
Non-primitive data types are essentially objects that have their own behavior and properties, and they can be manipulated using methods provided by the object itself or through inheritance from other classes. Here's why they're called non-primitive:
They occupy more memory than primitive types because they contain additional information such as pointers to methods. They provide a level of abstraction that allows for more complex data structures and algorithms. They can be created dynamically at runtime using constructors or factory methods.Some common characteristics of non-primitive data types include:
They can have their own methods (behavior) which can be invoked on instances of the class. They can have fields (properties) which are stored in memory. They can be instantiated multiple times, each with its own state. They can inherit behavior and properties from parent classes.In summary, non-primitive data types in Java are objects that have their own behavior and properties, occupy more memory than primitive types, and provide a level of abstraction that allows for more complex data structures and algorithms.
