Here you learn how to change tomcat port number. The default port number of tomcat is 8080. If the port number assigned to tomcat is used by any other application then you can’t run tomcat on that port. In that situation the only solution is to change tomcat default port number. There are two ways […]
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Here you will get java program to insert element in array at specified position. How it works? First copy all the elements before the position where element is to be inserted in a new array. Now assign the element at given position in the new array. Finally copy all the elements after the position where
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Here you will learn how to send email in java using smtp. JavaMail API provides the functionality for sending email. The process involves following three step. Get Session Object Compose Message Send Message For sing JavaMail API we have to import jars mail.jar and activation.jar. Download the jars from below link and import in your
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Here you will get java program for matrix multiplication. Suppose we have matrix A with number of rows and columns as m and n. Let B be a matrix with number of rows and columns as p and q. Their multiplication is possible only if number of columns of matrix A is equal to number
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Here you will get servlet login and logout example using HttpSession. There are various ways to maintain session but here I will use HttpSession class. In this example we have a index.html page where a login form is displayed. When user enters login details and submits the form the request is sent to LoginServlet. If the details
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Here you will get servlet registration form with mysql database example. This simple registration form include three fields, full name, email and password. If you want you can add more fields. Servlet Registration Form with MySQL Database Example MySQL Database As here we are using mysql database so create a database with name db. Now
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Here you will get to know the difference between ArrayList and Vector in Java programming language. ArrayList It is a class in Java that implements List interface. Unlike traditional array data structure, it is not fixed in length and doesn’t require its size to be specified in order to declare it. They can grow and
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Here you will get example to download file from server using servlet. The file can be of any type like image, pdf, video, music, etc. How it works? First set the content type to application/octet-stream. Now set the Content-Disposition header to attachment;filename=fileLocation. Read file from the source location using FileInputStream and write to ServletOutputStream to send as
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