Programming Step by Step

Example: This example is covered when discussing abstract classes. The example is modified such that instead of declaring Shape class as an...

Interface can be declared as abstract but it is superfluous and seldom done. Since interfaces are meant to be implemented by classes, inte...

The variables defined in an interface are implicitly public, static and final as discussed earlier. The variables can be accessed just like...

One interface can inherit another by use of keyword extends. The syntax is the same as for inheriting classes. When a class implements an i...

Once an interface has been defined, one or more classes can implement that interface. To implement an interface, include the implements cla...

The general form of an interface is like class as shown below. modifiers interface <interfac_name> { modifiers return_type method1(pa...

The purpose of the interface is to separate a class’s interface from its implementation. Interface just defines what a class must do withou...