Java Programing laungage

Core Java Tutorial

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Java has Following Features/Characteristics

Limitation of Java Language and Java Internet

Common Misconception about Java

Simple Program of Java

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Tokens in Java

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Operator on Integer and Separators in Java Programming

Java Control Flow of Statements

If and If-else Selection Statement

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break and labeled break statement

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Statement in Java

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Array in Java

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Two Dimensional Array Program

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String args Types in Java

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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)

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Sorting and Copying Array Using Java
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In java if you want to sort an array, you can use sort() method defined in the java.util.Arrays class. You can use the method both on the primitive type as well as on the object type arrays.

Example


int [] arr = new int[100];
/* some
    logic  */
Arrays.sort(arr);

Following program shows how to use sort() method for sorting an array :


import java.util.Arrays;
Java Tutorialslass sort
{
public static void main(String args[])
{
String[] arr=new String[]{"shashi", "employee", "r4r", "software", "engineer"};
Arrays.sort(arr);
for(int i=0; i<arr.length;i++)
System.out.println(arr[i]);
}
}

Copying Array

In java if you want to copy all values of one array to another, you have to use the arraycopy method defined in the java.lang.System class. The general form to call this method is :

System.arraycopy(copyfromarray,startingindex,copytoarray,fromindex,numberofelements);

Following example gives you the brief knowledge about how to use arraycopy() method:


Java Tutorialsclass Java Tutorialscopyarr
{
public static void main(String args[])
{
String[] arr=new String[]{"shashi", "employee", "r4r", "software", "engineer"};
String[] arr1=new String[3];
System.arraycopy(arr,0,arr1,0,3);
System.out.println("The contents of new array :");
for(int i=0;i<arr1.length;i++)
System.out.println(arr1[i]);
 }
}

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