JOptionPane - showInputDialog

import javax.swing.*;


class AdditionDemo{
public static void main(String rk[]){


try{
String num1 = JOptionPane.showInputDialog("Input fist Value") ;
String num2 = JOptionPane.showInputDialog("Input second Value") ;

int a = Integer.parseInt(num1);
int b = Integer.parseInt(num2);
int c = a+b;
JOptionPane.showMessageDialog(null," Total is : "+c);

}catch(Exception e ){
JOptionPane.showMessageDialog(null,"Oop !! Buddy, you gave wrong input. :-( ");
}
}
}

REGEX for number greater than zero

var nre= /^[1-9]+[0-9]*$/;
var regexp = new RegExp(nre);

if(regexp.test(val)){
alert(“Number is greater than zero.”)
}

STRUTS : logic:notEmpty

"<"logic:notEmpty name=”beanName” property=”beanPropertyName”">"

"<"bean:write name=”beanName” property=”beanPropertyName”/">"

"<"/logic:notEmpty">"



Note : if you have DataBean.java class with userName as its one property variable, and if you gave one object of DataBean class i.e “dataBean” in request scope , then you could use that object as given below into the destination .jsp page.



"<"logic:notEmpty name=”dataBean” property=”userName”">"

"<"bean:write name=”dataBean” property=”userName”/">"

"<"/logic:notEmpty">"

STRUTS – ITERATE MAP – logic:iterate

"<"logic:iterate id=”keyValuePair” name=”mapName”">"

"<"bean:write name=”keyValuePair” property=”key”/">"
"<"bean:write name=”keyValuePair” property=”value”/">"

"<"/logic:iterate">"

STRUTS- ITERATE LIST : logic:iterate

"<"logic:iterate id=”userName” name=”userNameList”">"

"<"bean:write name=”userName”/">"

"<"/logic:iterate">"

STRUTS- ITERATE LIST TO GET OBJECT : logic:iterate

"<"logic:iterate id=”studDataObj” name=”dataList” type=”com.student.Data” ">"

"<"bean:write name=”studDataObj” property=”rollNumber”/">"
"<"bean:write name=”studDataObj” property=”name”/">"

"<"/logic:iterate">"



Note : Here com.student.Data is the package name with actualy “Data.java” class

class Data {

String name;

int rollNumber;

/*

……………

setter getter method

…………….

*/

}

STRUTS : logic:equal , logic:notEqual

logic:equal

"<"logic:equal name=”studentDataObject” property=”rollNumber” value=”11″">"
"<"bean:write name=”studentDataObject” property=”rollNumber”/">"
"<"/logic:equal">"

——————————————————————————————————-

logic:notEqual

"<"logic:notEqual name=”studentDataObject” property=”rollNumber” value=”3″">"

"<"bean:write name=”studentDataObject” property=”rollNumber”/">"

"<"/logic:notEqual">"

JQUERY : GET SELECT-OPTION VALUE

$(document).ready(function() {   

    $('#selectElementId').change(function(){

                var value=$('#selectElementId').val();
                alert(value)

    });

});