Java is related to C++, which is a direct descendant of C.
Much of the character of Java is inherited from these two languages. From C,
Java derives its syntax. Many of Java’s object-oriented features were
influenced by C++. In fact, several of Java’s defining characteristics come
from—or are responses to—its predecessors.
Java was conceived by James Gosling, Patrick
Naughton, Chris Warth, Ed Frank, and Mike Sheridan at Sun
Microsystems, Inc. in 1991. This language was initially called “Oak,” but
was renamed “Java” in 1995.
Somewhat surprisingly, the original impetus for Java was
not the Internet! Instead, the primary motivation was the need for a platform-independent language that
could be used to create software to be embedded in various consumer electronic devices,
such as microwave ovens and remote controls. As you can probably guess, many
different types of CPUs are used as controllers. The trouble with C and C++ is
that they are designed to be compiled for a specific target. Although it is
possible to compile a C++ program for just about any type of CPU, to do so
requires a full C++ compiler targeted for that CPU. The problem is that
compilers are expensive and time-consuming to create. An easier—and more
cost-efficient—solution was needed. In an attempt to find such a solution,
Gosling and others began work on a portable, platform-independent language that
could be used to produce code that would run on a variety of CPUs under
differing environments. This effort ultimately led to the creation of Java.
Major
features of Java:
- Simple : If you have some programming experience, you will not find Java hard to master.
- Object Oriented : In java everything is Object which has some data and behavior. Java can be easily extended as it is based on Object Model.
- Robust : The multiplatform environment of the Web places extraordinary demands on a program, because the program must execute reliably in a variety of systems. Thus, the ability to create robust programs was given a high priority in the design of Java.
- Multithreaded : Java was designed to meet the real-world requirement of creating interactive, networked programs. To accomplish this, Java supports multithreaded programming, which allows you to write programs that do many things simultaneously.
- Architecture-neutral : Java is not tied to a specific machine or operating system architecture.
- Interpreted : Java supports cross-platform code through the use of Java bytecode.
- High performance : Byte codes are highly optimized. JVM can executed them much faster.
- Distributed : Java is designed for the distributed environment of the Internet because it handles TCP/IP protocols.
- Dynamic : Java programs carry with them substantial amounts of run-time type information that is used to verify and resolve accesses to objects at run time. This makes it possible to dynamically link code in a safe and expedient manner.
Core Java Programs
- Count the number of words in a given text file
- Sort array of strings in dictionary order
- Sort an array row-wise
- Partial search for a string in an array
- Binary search for an element in the array
- Linear search for an element in the array
- Perform addition, subtraction and multiplication on two arrays
- Obtain the transpose of an array
- Count the vowels in a string
- Set array elements to 1 if prime
- Convert the given number to words
- Search a character in a string
- Insertion and deletion of strings in an array
- Check for duplicate string in an array
- Remove all extra spaces in a sentence
- Check whether one string is a sub-string of another string
- Generate Multiplication table
- Generate a table of factorials of numbers
- Add or Multiply two Fractions
- Convert seconds to hour, minutes and seconds
- Check whether a number is Prime or Odd
- Fibonacci Sequence generation
- Decimal to Binary Conversion
- Nearest Smaller Prime number of a given number
- Simple Calculator in java
- Generate prime number between two number
- Absolute value of a number
- Sum of digits of a number
- Generate leap years between two years
- Due date calculation in a Library
- Reverse an Integer value
- Students' result calculation
- Check whether the given sides are Valid Sides of a Triangle
- Check whether the given number is a Valid Year or not