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Java Database Connectivity is a standard Java API used to connect Java application with Database. Java JDBC is used to communicate with the different type of Databases like Oracle, MS Access, My SQL and SQL Server. JDBC can also define as the platform-independent interface between a relational database and Java programming.

The world of Java and its functionalities have opened while a new dimension for programmers.

Accounting is the backbone of every business. Small as well as the large companies are hiring the accountants possessing immense knowledge about business accounting as well as taxation. Nowadays you can't imagine a business without accounts as they all have to pay taxes. The businesses are looking for employees who have knowledge of E-accounting as it makes the work less time consuming and accurate. E-Accounting course is one of the most preferred courses in recent times. The E-Accounting course will help you in gaining the essential skills that are required to become an accountant in a reputed corporation. The course opens a wide scope for you in the field of accounts.

Java.util package provides an IdentityHashMap class which implements the Map interface with a hash table, using reference-equality in place of object-equality when comparing keys (and values). In other words, in an IdentityHashMap, two keys k1 and k2 are considered equal if and only if (k1==k2). (In normal Map implementations (like HashMap) two keys k1 and k2 are considered equal if and only if (k1==null ? k2==null : k1.equals(k2)).)

Java.util package provides a Calendar class which represents a specific instant in time, with millisecond precision.

Java.util package provides a Random class. An instance of this class is used to generate a stream of pseudorandom numbers. The class uses a 48-bit seed, which is modified using a linear congruential formula. The algorithms implemented by class Random use a protected utility method that on each invocation can supply up to 32 pseudorandomly generated bits.

Java.util package provides a TreeSet class which is a NavigableSet implementation based on a TreeMap. The elements are ordered using their natural ordering, or by a Comparator provided at set creation time, depending on which constructor is used. The class guarantees that the Map will be in ascending key order and backed by a TreeMap.

Java.util package provides a EnumMap class which is a specialized Map implementation for use with enum type keys. All of the keys in an enum map must come from a single enum type that is specified, explicitly or implicitly, when the map is created.

The Java has a number of methods and functions that are available for use with strings. These methods and functions are listed in alphabetical order.

Java.util package provides a PriorityQueue class where an unbounded priority queue based on a priority heap. The elements of the priority queue are ordered according to their natural ordering, or by a Comparator provided at queue construction time, depending on which constructor is used. A priority queue does not permit null elements. A priority queue relying on natural ordering also does not permit insertion of non-comparable objects.

Java.util package provides a BitSet class which implements a vector of bits that grows as needed. Each component of the bit set has a boolean value. The bits of a BitSet are indexed by nonnegative integers. By default, all bits in the set initially have the value false. One BitSet may be used to modify the contents of another BitSet through logical AND, logical inclusive OR, and logical exclusive OR operations.

Java.util package provides a Hashtable class which implements hash table and maps keys to value. Any non-null object can be used as a key or as a value. To successfully store and retrieve objects from a hashtable, the objects used as keys must implement the hashCode method and the equals method.

Java.util package provides a Dictionary class which is the abstract parent of any class, such as Hashtable, which maps keys to values. Every key and every value is an object. In any one Dictionary object, every key is associated with at most one value. Given a Dictionary and a key, the associated element can be looked up. Any non-null object can be used as a key and as a value.

Java.util package provides a LinkedList class which has Doubly-linked list implementation of the List and Deque interfaces. The class has all optional list operations, and permits all elements (including null). Operations that index into the list will traverse the list from the beginning or the end, whichever is closer to the specified index.

Java.util package provides a Scanner class. A simple text scanner parse primitive types and strings using regular expressions. A Scanner breaks its input into tokens using a delimiter pattern, which by default matches whitespace. The resulting tokens may then be converted into values of different types using the various next methods.

Java.util package provides a Arrays class which contains a static factory that allows arrays to be viewed as lists. The class contains various methods for manipulating arrays like sorting and searching. The methods in this class throw a NullPointerException, if the specified array reference is null.

The type casting is a method of converting the value of one data type to another data type. It is also known as type conversion. In Java, there are several kinds of conversions. However, in this tutorial we will focus only on two major types: Widening Type Casting, Narrowing Type Casting.

Threats related to Java programming language are increasing day by day. It also reminds about the old whack-a-mole arcade game. With the vulnerable version of Java, your computer becomes prone to malware or other threats.

The wrapper class in Java provides the mechanism to convert primitive into object and object into primitive.

Per Chris: On-the-fly, browser-based, java-running screen capturing?  Oh heck yeah.