Send Email Using Java

In this tutorial, I am showing how to send an email using JavaMail API. Sending email is a required use case for every project.

Here I am using gmail host( smtp.gmail.com) and gmail username and password for authentication. For a bigger projects, you have to use paid mail service provider and they will provide the required information like host and port parameters.

Here I am explaining following topics with complete examples

a) Sending plain text Email with JavaMail API

b) Sending HTML email with JavaMail API

c) Sending email attachment with JavaMail API

Read CSV File Using Java Scanner Class

Here I am demonstrating how to read / parse CSV file using java scanner class.

For example my csv file (user.csv) looks like below.

Rockey,22,India
Bill,23,US
Sonia,23,Germany


Now I am creating java class for mapping the above fields in csv file.


Create Gantt Chart Using JFreeChart

Create Gantt Chart Using JFreeChart explains about creating a simple gantt chart using JFreechart API

A Gantt chart is a type of bar chart that illustrates a project schedule, named after their inventor, Henry Gantt (1861–1919), who designed such a chart around the years 1910–1915. Modern Gantt charts also show the dependency relationships between activities and current schedule status.

Reference -> https://en.wikipedia.org/wiki/Gantt_chart

How To Create Gantt Chart Using JFreeChart library?

Create Scatter Chart Using JFreeChart

Create Scatter Chart Using JFreeChart explains about creating a simple scatter chart using JFreechart API

A scatter plot (also called a scatterplot, scatter graph, scatter chart, scattergram, or scatter diagram) is a type of plot or mathematical diagram using Cartesian coordinates to display values for typically two variables for a set of data. If the points are color-coded, one additional variable can be displayed. The data are displayed as a collection of points, each having the value of one variable determining the position on the horizontal axis and the value of the other variable determining the position on the vertical axis.

Reference -> https://en.wikipedia.org/wiki/Scatter_plot

How To Create Scatter Chart Using JFreeChart library?

Create Area Chart Using JFreeChart

Create Area Chart Using JFreeChart explains about creating a simple area chart using JFreechart API

A area chart or area graph displays graphically quantitative data. It is based on the line chart. The area between axis and line are commonly emphasized with colors, textures and hatchings. Commonly one compares with an area chart two or more quantities.

Reference -> https://en.wikipedia.org/wiki/Area_chart

How To Create Area Chart Using JFreeChart library?

How to diagnose memory leaks in java

Memory leaks doesn't have to be hard/scary/tedious problem to solve, if you follow below mentioned 3 simple steps:

Step 1: Capture baseline heap dump

You need to capture heap dump when it’s in healthy state. Start your application. Let it take real traffic for 10 minutes. At this point capture heap dump. Heap Dump is basically snapshot of your memory. It contains all objects that are residing in the memory, values stored in those objects, inbound & outbound references of those object. You can capture Heap dump can be captured using following command:


jmap -dump:format=b,file=<file-path> <pid>

where

pid: is the Java Process Id, whose heap dump should be captured

file-path: is the file path where heap dump will be written in to.

7 Reasons Why You Should Learn Python

Python is preferred by many developers for its strong emphasis on productivity and readability, especially when compared to other languages like Java, PHP, and C++.

Professionally, Python is great for backend web development, data analysis, artificial intelligence, and scientific computing. Here’s why Python is worth learning in 2017 and the years ahead:

How to Avoid Liferay DXP Upgrading Pitfalls?

Timely upgrades can be proved a strategic move towards lifting the operational excellence to the next level. Experienced management individuals know very well that how the essential pieces of functionalities can greatly improve performance of process along with addressing the security challenges. Hence, they favor the technology upgrades anticipating reasonable amount of Return on Investment (ROI).

As Liferay DXP is a revolutionary version of Liferay enterprise portal launched in 2016, lot many organizations would rather opt for upgrading to Liferay DXP.