Java Packages

Collection of similar classes, interfaces and sub packages

• variable

• Interface

• packages

• class

Define Subpackage

• class member of package

• interface member of package

• package within another package

• None

API

• applet programming interface

• application programming interface

• all time program interterface

• None

Uses of Packages

• easily maintained

• access protection

• avoid naming collision

• None

package types

• user defined

• built-in package

• both

• none

what is the Syntax to define or create a package?

•      package <package_name>

•      package <package_name>;

• import      package <package_name>;

• none

___________ is a collection of prewritten packages, classes, and interfaces with their respective methods, fields and constructors.

• API package

• class

• interface

• user defined package

what is syntax to improt all the content of package?

• import packaage_name.class_name;

• import package_name.*;

• import pak1.pak2.pak3;

• None

what is syntax to improt a particular class of package?

• import class_name.*;

• import package_name.*;

• import pak1.pak2.pak3;

• import packaage_name.class_name;

Choose the correct sequence.

• Select  Start -> Control Panel ->Environment Variables -> System Variables -> CLASSPATH

• Select  Start -> Control Panel ->system& security-> System -> Advanced -> Environment Variables -> System Variables -> CLASSPATH

• Select  Start -> Control Panel ->system& security-> System -> System Variables -> CLASSPATH

• Select  Start -> system& security-> System -> Advanced -> Environment Variables -> System Variables -> CLASSPATH