How to Get the Fist Tag within List of Tags
$(this).parent().find('.TickImgCont');
Author Archives: admin
Effect of extends and Object over constructor and parent class
How Static and Constructor will work when class is Extended
public class Main2 extends A
{
public static void main(String args[])
{
}
}
class A extends B
{
A()
{
System.out.println("I am A Constrctor");
}
static
{
System.out.println("I am Static Method");
}
{
System.out.println("Empty");
}
}
class B
{
B()
{
System.out.println("I am B Constrctor");
}
}
OP:I am Static Method
How Static and Constructor will work when class object is Created
public class Main2 extends A
{
public static void main(String args[])
{
A objA = new A();
}
}
class A extends B
{
A()
{
System.out.println("I am A Constrctor");
}
static
{
System.out.println("I am Static Method");
}
{
System.out.println("Empty");
}
}
class B
{
B()
{
System.out.println("I am B Constrctor");
}
}
OP:I am Static Method
I am B Constrctor
Empty
I am A Constrctor
How to store CSV in hidden Field Javascript
How to Store CSV Ids in Hidden Field
Script
function AddProjectId(pProjectId)
{
var arrProjectIds = new Array();
var strComma = '';
csvProjectIds = $('#hdnInterestedProjectIds').val();
csvProjectIds = $.trim(csvProjectIds);
if (csvProjectIds != '')
{
arrProjectIds = csvProjectIds.split(', ');
lngArrLength = arrProjectIds.length;
} else {
lngArrLength = 0;
}
if (arrProjectIds.indexOf(pProjectId) != 0) {
if (lngArrLength > 0)
strComma = ', ';
csvProjectIds = csvProjectIds + strComma + pProjectId;
}
$('#hdnInterestedProjectIds').val(csvProjectIds);
}
function RemoveProjectId(pProjectId)
{
csvProjectIds = $('#hdnInterestedProjectIds').val();
csvNewProjectIds = '';
arrProjectids = csvProjectIds.split(', ');
arrNewProjectIds = new Array();
lngArrLength = arrProjectids.length;
for (i = 0; i < lngArrLength; i++)
{
if (arrProjectids[i] != pProjectId)
{
arrNewProjectIds.push(arrProjectids[i]);
}
}
for (i = 0; i < arrNewProjectIds.length; i++)
{
strComma = '';
if ((csvNewProjectIds != '') && (arrNewProjectIds.length != (arrNewProjectIds.length - 1)))
strComma = ', ';
csvNewProjectIds = csvNewProjectIds + strComma + arrNewProjectIds[i];
}
$('#hdnInterestedProjectIds').val(csvNewProjectIds);
}
<input type=”hidden” name=”hdnInterestedProjectIds” id=”hdnInterestedProjectIds”/>
Working with javascript Arrays
How to Split CSV into array
csvProjectIds = '1,2,3,4';
arrProjectIds = csvProjectIds.split(',');
Output
arrProjectIds[0] = 1
arrProjectIds[1] = 2
arrProjectIds[2] = 3
arrProjectIds[3] = 4
How to Find Element is in Array
csvProjectIds = '1,2,3,4';
arrProjectIds = csvProjectIds.split(',');
alert(arrProjectIds.indexOf('1'));
Output
0
The indexOf Returns 0 incase the element is in the array or
-1 if not in the array
Initiation Order
What would be the Output
public class Main
{
static
{
System.out.println("My Name is Mugil");
}
}
OP: My Name is Mugil
followed by exception in Main
public class Main
{
static
{
System.out.println("My Name is Mugil");
}
public static void main(String args[])
{
{
System.out.println("What is your Name");
}
}
}
OP: My Name is Mugil
What is your Name
public class Main
{
public static void main(String args[])
{
{
System.out.println("What is your Name");
}
}
}
OP: What is your Name
4.What is the order they are processed
public class Main
{
public static void main(String args[])
{
{
ClassA objA = new ClassA();
System.out.println("What is your Name");
}
}
}
class ClassA
{
static
{
System.out.println("I am in ClassA Static");
}
ClassA()
{
System.out.println("I am in ClassA Constrctor");
}
{
System.out.println("I am in ClassA");
}
}
OP:I am in ClassA Static
I am in ClassA
I am in ClassA Constrctor
What is your Name
Static blocks are initiated at first followed by Constructor followed by classA and content in empty class.
5.How to Use Object to invoke function in Class
public class Main2
{
public static void main(String args[])
{
new A().showName();
}
}
class A
{
public void showName()
{
System.out.println("Hi there");
}
}
OP : Hi there
6.How to Find Class of object
public class Main3
{
public static void main(String[] args)
{
ClasB objB = new ClasB();
if(objB instanceof ClasB)
{
System.out.println(objB.getClass().getName());
}
}
}
class ClasB
{
}
How Jquery Toggle Class Works
Toggle Class does not work by the way you think
.ClassA
{
color : green;
}
.ClassB
{
color : red;
}
$('document').ready(function(){
$('.ClassA').on('click', function(){
alert($(this).attr('class'));
$(this).toggleClass('ClassB')
});
});
<div>Class A</div> <div>Class B</div>
After the first Time ClassA is Applied When you click ClassA both ClassA and ClassB will be applied to the same tag.
The alert message will display output some thing link ClassA ClassB
Final
Final Modifier Assures that a Reference variable cannot be referenced to a different Object
public class Main
{
public int Age;
public static void main(String args[])
{
final Main objMain = new Main();
Main objMain2 = new Main();
objMain = objMain2;
}
}
OP:Generates a Exception
The final local variable objMain cannot be assigned.
Java Classes and Objects
How to find Class of Object
public class Main
{
public static void main(String args[])
{
A objA = new A();
if(objA instanceof A)
{
System.out.println(objA.getClass());
}
}
}
class A
{
}
Working With Arrays Java
How to find Length of Array
public class Main
{
public static void main(String args[])
{
int[] a = {1,2,3,4,5};
System.out.println("Length of array " + a.length);
}
}
Two Dimensional Array – Java
class Main
{
public static void main(String args[])
{
int[][] a = {{1,2}, {3,4}};
System.out.println("Content of array " + a[0][1]);
System.out.println("Length of array " + a[0].length);
}
}
OP: Content of array 2
Length of array 2
public class Main11
{
public static void main(String args[])
{
String[] arrName = new String[5];
int[] arrAge = {21, 25, 24, 26, 27};
char[] arrSection = {'A', 'B', 'C', 'D', 'E'};
arrName[0] = "Mugil";
arrName[1] = "Vinu";
arrName[2] = "Madhavan";
arrName[3] = "Adhavan";
arrName[4] = "Suryan";
//Method 1
for(int i=0;i<arrName.length;i++)
{
if(arrName[i] != null)
System.out.println(arrName[i]);
}
//Method 2
//For - Each Method
for(String item : arrName)
{
System.out.println(item);
}
//Method 3
int j =0;
while(j<arrAge.length)
{
System.out.println(arrAge[j]);
j++;
}
//Method 4
int k=0;
do
{
System.out.println(arrSection[k]);
k++;
}while(k<arrSection.length);
}
}
How to use interface Java
How to use interface Java
public class Main
{
public static void main(String args[])
{
BallAttributes objBallAttributes = new BallAttributes();
RubberBall objRubberBall = new BallAttributes();
objBallAttributes.bouncable();
objRubberBall.moveable();
}
}
class BallAttributes implements RubberBall, Movable
{
public void bouncable()
{
System.out.println("I am Bouncing");
}
public void moveable()
{
System.out.println("I am Moving");
}
}
interface RubberBall
{
public void bouncable();
}
interface Movable
{
public void moveable();
}