Java Array Iterator Pro

Replace an element from Array List using Java List Iterator

import java.util.ListIterator;

import java.util.ArrayList;   

public class ReplaceAnElementUsingListIteratorExample

{   

public static void main(String[] args)

 {

ArrayList aList = new ArrayList();

aList.add("1");

aList.add("2");

aList.add("3");

aList.add("4");

aList.add("5");

ListIterator listIterator = aList.listIterator();listIterator.next();  listIterator.set("100");

System.out.println("After replacing 1 with 100, ArrayList contains");

for(int intIndex = 0; intIndex < aList.size(); intIndex++)

System.out.println(aList.get(intIndex));

    }

}

Traverse through Array List in forward direction using Java List Iterator

import java.util.ListIterator;

import java.util.ArrayList; 

public class TraverseForwardUsingListIteratorExample

{

public static void main(String[] args)

{

ArrayList aList = new ArrayList();

aList.add("1");

aList.add("2");

aList.add("3");

aList.add("4");

aList.add("5");

ListIterator listIterator = aList.listIterator();   

System.out.println("Traversing ArrayList in forward direction

using ListIterator");

while(listIterator.hasNext())

System.out.println(listIterator.next());

   }

}

Traverse through Array List in reverse direction using Java List Iterator

import java.util.ListIterator;

import java.util.ArrayList; 

public class TraverseReverseUsingListIteratorExample

{

public static void main(String[] args)

{

ArrayList aList = new ArrayList();

aList.add("1");

aList.add("2");

aList.add("3");

aList.add("4");

aList.add("5");

ListIterator listIterator = aList.listIterator();

System.out.println("Traversing ArrayList in forward direction

using ListIterator");

while(listIterator.hasNext())

System.out.println(listIterator.next());

System.out.println("Traversing ArrayList in reverse direction

using ListIterator");

while(listIterator.hasPrevious())

System.out.println(listIterator.previous());

   }

}

Performing Binary Search on Java byte Array

import java.util.Arrays;

public class BinarySearchByteArrayExample

{

public static void main(String[] args)

{

byte bArray[] = {1,2,4,5};Arrays.sort(bArray); byte searchValue = 2;

int intResult = Arrays.binarySearch(bArray,searchValue);

System.out.println("Result of binary search of 2 is : " + intResult);

searchValue = 3;

intResult = Arrays.binarySearch(bArray,searchValue);

System.out.println("Result of binary search of 3 is : " + intResult);

   }

}

Performing Binary Search on Java char Array

import java.util.Arrays; 

public class BinarySearchCharArrayExample

{

public static void main(String[] args)

{

char charArray[] = {'a','b','d','e'};  Arrays.sort(charArray);  char searchValue = 'b';

int intResult = Arrays.binarySearch(charArray,searchValue);

System.out.println("Result of binary search of 'b' is : " + intResult);

searchValue = 'c';

intResult = Arrays.binarySearch(charArray,searchValue);

System.out.println("Result of binary search of 'c' is : " + intResult);

   }

}