Programming Articles - Page 3247 of 3366

BenefitsEasier access to any element using the index.Easy to manipulate and store large data.DisadvantagesFixed size. Can not be increased or decrease once declared.Can store a single type of primitives only.

Following are various methods of Object class −protected Object clone() - Used to create and return a copy of this object. boolean equals(Object obj) - Used to indicate whether some other object is "equal to" this one.protected void finalize() - garbage collector calls this method on an object when it determines that there are no more references to the object.Class getClass() - Used to get the runtime class of this Object.int hashCode() - Used to get a hash code value for the object.void notify() - Used to wake up a single thread that is waiting on this object's monitor.void notifyAll() - ... Read More

Yes, an overridden method can have a different access modifier but it cannot lower the access scope.The following rules for inherited methods are enforced -Methods declared public in a superclass also must be public in all subclasses.Methods declared protected in a superclass must either be protected or public in subclasses; they cannot be private.Methods declared private are not inherited at all, so there is no rule for them.

Passing Drop Down Box Data to CGI ProgramDrop Down Box is used when we have many options available but only one or two will be selected.Here is example HTML code for a form with one drop down box − Maths Physics The result of this code is the following form − SubmitBelow is dropdown.py script to handle input given by web browser.#!/usr/bin/python # Import modules for CGI handling import cgi, cgitb # Create instance of FieldStorage form ... Read More

Passing Text Area Data to CGI ProgramTEXTAREA element is used when multiline text has to be passed to the CGI Program.Here is example HTML code for a form with a TEXTAREA box − Type your text here... The result of this code is the following form −Type your text here...  SubmitBelow is textarea.cgi script to handle input given by web browser −#!/usr/bin/python # Import modules for CGI handling import cgi, cgitb # Create instance of FieldStorage form = cgi.FieldStorage() # Get data from fields if form.getvalue('textcontent'):    text_content = form.getvalue('textcontent') else:    text_content = "Not entered" print ... Read More

Passing Radio Button Data to CGI ProgramRadio Buttons are used when only one option is required to be selected.Here is example HTML code for a form with two radio buttons − Maths Physics The result of this code is the following form − Maths  Physics Select SubjectBelow is radiobutton.py script to handle input given by web browser for radio button −#!/usr/bin/python # Import modules for CGI handling import cgi, cgitb # Create instance of FieldStorage form = cgi.FieldStorage() # Get data from fields if form.getvalue('subject'):    subject = form.getvalue('subject') else:    subject = "Not set" print "Content-type:text/html\r\r" print ... Read More

Passing Checkbox Data to CGI ProgramCheckboxes are used when more than one option is required to be selected.Here is example HTML code for a form with two checkboxes − Maths Physics The result of this code is the following form −Maths  Physics Select SubjectBelow is checkbox.cgi script to handle input given by web browser for checkbox button.#!/usr/bin/python # Import modules for CGI handling import cgi, cgitb # Create instance of FieldStorage form = cgi.FieldStorage() # Get data from fields if form.getvalue('maths'):    math_flag = "ON" else:    math_flag = "OFF" if form.getvalue('physics'):    physics_flag = "ON" else: ... Read More

Suppose there is an HTML file as below − FirstName: LastName: After submitting this form it should go to a Python page named "getData.py", where you should fetch the data from this HTML page and show. then below is the code for Python CGI. #!C:\Python27\python.exe # Import modules for CGI handling import cgi, cgitb # Create instance of FieldStorage form = cgi.FieldStorage() # Get data from fields first_name = form.getvalue('first_name') last_name  = form.getvalue('last_name') print("Content-type:text/html") print print("") print("") print("Hello - Second CGI Program") print("") print("") print(" ... Read More

It is possible to get a custom request header's value in an apache CGI script with python. The solution is similar to this.Apache's mod_cgi will set environment variables for each HTTP request header received, the variables set in this manner will all have an HTTP_ prefix, so for example x-client-version: 1.2.3 will be available as variable HTTP_X_CLIENT_VERSION.So, to read the above custom header just call os.environ["HTTP_X_CLIENT_VERSION"].The below script will print all HTTP_* headers and values −#!/usr/bin/env python import os print "Content-Type: text/html" print "Cache-Control: no-cache" print print "" for headername, headervalue in os.environ.iteritems():     if headername.startswith("HTTP_"):         print "{0} = {1}".format(headername, headervalue)   ... Read More

suppose you want to login into you account using Python CGi script, below is the details login.html email: password: login.py #!C:\Python27\python.exe import MySQLdb import cgi import Cookie # Open database connection db = MySQLdb.connect("localhost", "root", "", "student" ) # prepare a ... Read More