An IS-A relationship is inheritance. The classes which inherit are known as sub classes or child classes. On the other hand, HAS-A relationship is composition . In OOP, IS-A relationship is completely inheritance. This means, that the child class is a type of parent class.15 Eki 2018
Read moreIs a or has a relationship Java?
In Java, we have two types of relationship: Is-A relationship: Whenever one class inherits another class, it is called an IS-A relationship. Has-A relationship: Whenever an instance of one class is used in another class, it is called HAS-A relationship.
Read moreWhat are the main parts of Java?
There are three main components of Java language: JVM, JRE, and JDK . Java Virtual Machine, Java Runtime Environment and Java Development Kit respectively.
Read moreWhat is the composition of an object?
Object composition refers to the logical or conceptual structure of the information , not the implementation or physical data structure used to represent it. For example, a sequence differs from a set because (among other things) the order of the composed items matters for the former but not the latter.
Read moreWhat is composition in Example?
The definition of composition is the act of putting something together, or the combination of elements or qualities. An example of a composition is a flower arrangement . An example of a composition is a manuscript. An example of a composition is how the flowers and vase are arranged in Van Gogh’s painting Sunflowers.
Read moreWhy do we need composition in Java?
Benefits of using Composition: Composition allows us to reuse the code . In Java, we can use multiple Inheritance by using the composition concept. The Composition provides better test-ability of a class. Composition allows us to easily replace the composed class implementation with a better and improved version.
Read moreWhat is difference between aggregation and composition in Java?
Aggregation implies a relationship where the child can exist independently of the parent . For example, Bank and Employee, delete the Bank and the Employee still exist. whereas Composition implies a relationship where the child cannot exist independent of the parent.
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