Java Programing laungage

Core Java Tutorial

Introduction of Core Java

How To Install JDk and Set of Path

Syntax of java Program

Difference between Java and C/C++

Advantage and Disadvantage of Java

What is Java

Why Java is not Pure Object Oriented Language

Java has Following Features/Characteristics

Limitation of Java Language and Java Internet

Common Misconception about Java

Simple Program of Java

Integrated Development Environment in java

Compile and Run Java Program

Applet and Comments in Java

Tokens in Java

Keywords in Java

Identifier and Variables in Java

Literals/Constants

Data Type in Java

Assignments and Initialization in Java

Operators in Java

Rule of Precedence in Java

Operator on Integer and Separators in Java Programming

Java Control Flow of Statements

If and If-else Selection Statement

Nested If-else and If-else-If Selection Statement

switch case and conditional operator Selection Statement

for and while Loop

do..while and for each Loop

break and labeled break statement

continue and labeled continue statement

return Statement and exit() Method

Escape Sequence for Special Characters and Unicode Code

Constants and Block or Scope

Statement in Java

Conversions between Numeric Types in Java

Import Statement in Java

User Input in Java using Scanner Class

User Input in Java using Console Class

Array in Java

One Dimensional Array

Two Dimensional Array

Two Dimensional Array Program

Command Line Argument in Java

String args Types in Java

Uneven/Jagged array in java

Math Class Function and Constant

Math Class all Function used in a program

Enumerated Types in Java

Object Oriented Programming v/s Procedural Programming

Object Oriented Programming Concepts in Java

Introduction to Class,Object and Method in Java

Class Declaration in Java

Class & Objects in java

Encapsulation in Java

Modifiers/Visibility for a Class or Interrface or member of a Class

Polymorphism in Java

Runtime polymorphism (dynamic binding or method overriding)

Big Numbers In Java
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While programming if the precision of the integers and floating point number is not according to the requirements, then we can use the big numbers defined in java.

the big numbers are contained in java.math package, BigInteger is used for manipulating the precision of the integral values while BigDecimal is used for the floating point numbers. The method valueOf(), defined in the package can turn any ordinary number to a big number.


BigInteger num = BigInteger.valueOf(300);

In this example we have converted a simple integer 300 to a BigInteger type value and assigned it to the num. Also note that we cannot use basic operators like +, -, /, * directly on the big numbers, infact we have to use predefined methods like add(), multiply() in order to combine the big numbers. For e.g.


BigInteger num = BigInteger.valueOf(300);
BigInteger p = num.add(BigInteger.valueOf(200));    
// it goes as p=num+200= 300+200=500

Some of the methods which are defined in java.math.BigInteger class and used more commonly are :


BigInteger add(BigInteger second)                 
// returns the sum of current BigInteger with the second  
BigInteger multiply(BigInteger second)             
// returns the multiplication of current BigInteger with the second
BigInteger divide(BigInteger second)              
// returns the division of current BigInteger with the second
BigInteger subrtact(BigInteger second)           
// returns the subtraction of current BigInteger with the second
BigInteger mod(BigInteger second)                
// return the mod value of current BigInteger with the second

 

int Java TutorialsompareTo(BigInteger second)

It compares the value of the current BigInteger with the second and then returns an integral value. If current number is greater than second than it will give a positive integer, if equal it will return 0, else it will return a negative value.

static BigInteger valueOf(Long p)

It converts an integer number to the Big Integer type number.

Similarly we can use BigDecimal class to manipulating the precision of the floating point numbers. The frequent methods which are defined in the java.math.BigDecimal class are :


BigDecimal add(BigDecimal second)                   
// returns the sum of current BigDecimal with the second  
BigDecimal multiply(BigDecimal second)            
// returns the multiplication of current BigDecimal with the second
BigDecimal divide(BigDecimal second, int roundoff mode)
//returns the divison of current BigDecimal with 
second one with roundoff digits
BigDecimal subrtact(BigDecimal second)           
// returns the subtraction of current BigDecimal with the second
int Java TutorialsompareTo(BigDecimal second)                   
// return an integer after comparing the two BigDecimal type numbers
static BigDecimal valueOf(Long p)                     
// convert an simple number to the BigDecimal type number
static BigDecimal valueOf(Long p, int scale)      
// converts an simple to the BigDecimal number x /10^scale

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