Learn Java: Packages

Which package is always imported by default?

Does importing a package imports the sub packages as well? E.g. Does importing com.bob.* also import com.bob.code.*?

What is a Java package and how is it used?

Are the imports checked for validity at compile time? e.g. will the code containing an import such as java.lang.BOB compile?

How to create a package

What is Subpackage (package inside another package) ?

How to use package?

How to Use classes stored in jar file?

How the Java Compiler Finds Files?

Write Example for package?

Explain the Directory Structure  of Packages?

Explain Package java.rmi.server?

Is the API for accessing and processing data stored in a data source (usually a relational database) using the JavaTM programming language.?

Explain Package java.util?

Explain Package javax.accessibility?

Explain Package javax.imageio?

Explain Package javax.imageio.plugins.jpeg?

Explain Package javax.jws.soap?

Explain Package javax.naming?

Explain Package javax.rmi.CORBA?

Explain Package javax.rmi.CORBA?

Explain Package javax.sql.rowset?

Explain Package javax.swing?

Explain Package javax.xml?

Explain Package javax.xml.bind.annotation.adapters?

Explain Package org.omg.CosNaming.NamingContextExtPackage?

Explain Package org.omg.Messaging?

Explain Package org.w3c.dom.events?

Explain method getAnnotations() in java?

Explain method getDeclaredAnnotations() in java ?

Explain method getImplementationTitle() in java  ?

Explain method getImplementationVendor() in java?

Explain  method getImplementationVersion() in java ?

Explain method getName() in java?

Explain method getPackage(String name)  in java?

Explain method getPackages() in java?

Explain method getSpecificationTitle() in java?

Explain method getSpecificationVendor() ?

Explain method getSpecificationVersion() in java ?

Explain method hashCode() in java ?

Explain method isAnnotationPresent(Class annotationClass)  in java?

Explain method isCompatibleWith(String desired) in java?

Explain method isSealed() in java?

Explained method isSealed(URL url) in java?

Explain method toString() in java?

Explain about comparator in java.util package?

Explain about Enumeration in java.util package?

Explain about EventListener interface?

Explain about Formattable in java.util package?

Explain Iterator in java.util package?

Explain List in java.util package?

Explain ListIterator in java.util.package?

Explain Map in java.util.package?

Explain Map.Entry in java.util package?

Explain Observer in java.util package?

Explain Queue in java.util package?

Explain RandomAccess in java.util package?

Explain SortedMap in java.util package?

What is SortedSet?

What is public abstract class AbstractCollectionextends Objectimplements Collection?

Explain about iterator?

Explain about size in java.util packages?

Explain isEmpty method?

Explain is contains?  

Explain method toArray?

Explain method toArray?

Explain method add?

What is remove in java.util package?

Explain method containsAll?

What is addAll?

Explain method removeAll?

Explain method retainAll ?

Explain method clear

Explain method toString

Explain java.utilClass AbstractQueue?

Explain public boolean add(E o)?

Explain method removepublic E remove()?

Explain method element?

Explain method clearpublic void clear()?

Explain method addAll?

Explain  java.utilClass AbstractSequentialListjava.lang.Object

Explain method getpublic E get(int index)?

Explain  setpublic E set(int index,             E element)?

Explain method listIteratorpublic abstract ListIterator listIterator(int index)?

Explain method trimToSize?

Explain method ensureCapacity?

Explain method isEmptypublic boolean isEmpty()

Explain method  indexOfpublic int indexOf(Object elem)?

Explain method  lastIndexOfpublic int lastIndexOf(Object elem)?

Explain method removeRangeprotected void removeRange(int fromIndex,                           int toIndex)?

Explain method sortpublic static void sort(long[] a)

Explain public static void sort(Object[] a)?

Explain method binarySearchpublic static int binarySearch(long[] a,                               long key)?

Explain method equalspublic static boolean equals(long[] a,                             long[] a2)?

Explain method fillpublic static void fill(long[] a,                        long val)?

Explain method asListpublic static  List asList(T... a)?

Explain hashCodepublic static int hashCode(long[] a)?

Explain method deepHashCodepublic static int deepHashCode(Object[] a)

Explain method deepEqualspublic static boolean deepEquals(Object[] a1,                                 Object[] a2)

Explain method toStringpublic static String toString(long[] a)

Explain method deepToStringpublic static String deepToString(Object[] a)