Herbert Schildt (2008), Java 2 Complete References, Tata McGraw Hill, 7th Edition.
Balagurusamy E.(2010), Programming with JAVA, Tata McGraw Hill , 4th Edition.
Java provides a mechanism for partitioning the class name space into more manageable chunks. To create a package, include a package command as the first statement in a Java source file. … Read more »
Java includes the import statement to bring certain classes, or entire packages, into visibility. Once imported, a class can be referred to directly, using only its name… Read more »
Example program to define and import a package. … Read more »
Interface can be used to specify what a class must do, but not how it does it. Interfaces are similar to classes, but they lack instance variables, and their methods are declared without any body. … Read more »
Once an interface has been defined, one or more classes can implement that interface. To implement an interface, include the implements clause in a class definition, and then create the methods defined by the interface … Read more »
One interface can inherit another by use of the keyword extends. The syntax is the same as for inheriting classes. … Read more »