Question

4. Explain the significance of the Java library packages.
(a) java.lang (b) java.io (c) java math
in lavorora​

Answer 1

Packages In Java

Packages In JavaPackage in Java is a mechanism to encapsulate a group of classes, sub packages and interfaces. Packages are used for:

Packages In JavaPackage in Java is a mechanism to encapsulate a group of classes, sub packages and interfaces. Packages are used for:Preventing naming conflicts. For example there can be two classes with name Employee in two packages, college.staff.cse.Employee and college.staff.ee.Employee

Packages In JavaPackage in Java is a mechanism to encapsulate a group of classes, sub packages and interfaces. Packages are used for:Preventing naming conflicts. For example there can be two classes with name Employee in two packages, college.staff.cse.Employee and college.staff.ee.EmployeeMaking searching/locating and usage of classes, interfaces, enumerations and annotations easier

Packages In JavaPackage in Java is a mechanism to encapsulate a group of classes, sub packages and interfaces. Packages are used for:Preventing naming conflicts. For example there can be two classes with name Employee in two packages, college.staff.cse.Employee and college.staff.ee.EmployeeMaking searching/locating and usage of classes, interfaces, enumerations and annotations easierProviding controlled access: protected and default have package level access control. A protected member is accessible by classes in the same package and its subclasses. A default member (without any access specifier) is accessible by classes in the same package only.

Packages In JavaPackage in Java is a mechanism to encapsulate a group of classes, sub packages and interfaces. Packages are used for:Preventing naming conflicts. For example there can be two classes with name Employee in two packages, college.staff.cse.Employee and college.staff.ee.EmployeeMaking searching/locating and usage of classes, interfaces, enumerations and annotations easierProviding controlled access: protected and default have package level access control. A protected member is accessible by classes in the same package and its subclasses. A default member (without any access specifier) is accessible by classes in the same package only.Packages can be considered as data encapsulation (or data-hiding).

Answer 2

Answer:

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Explanation:

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