Java - To Load a property file

Property files are used to store static information in a key-value pair. Things that you do not want to hard code in your Java code, which tend to change in future goes into properties files. Also as it is a static information you do not want to load the property file for each and every request as it may hamper performance. You may need it to be loaded only once at the begining of the loading of application.

You can load properties file using below methods. You can provide absolute path as well as relative path however mostly relative path is preferred.

prop.load(AppProperties.class.getClassLoader().getResourceAsStream("app.properties"));
OR
prop.load(new FileInputStream(new File("C:/temp/app.properties")));

Please see the self explanatory java code below - 

LINUX - Shell script to detect file change

Below is the simple shell script which can be used to detect the file change in a particular directory. It can detect file modified, file touched, new file created, file deleted / moved, files mode change (chmod) / files owner change (chown). It runs continuously after a sleep of specified interval and compare the list of files against the list of files prior to sleep.

Please see the self explanatory shell script below.

New Features of Java 7

Java 7 contains many new features, enhancements and bug fixes to improve efficiency to develop and run Java programs.

Here is a brief summary of the enhancements included with the Java 7 release:

• Improved performance, stability and security.
• Enhancements in the Java Plug-in for Rich Internet Applications development and deployment.
• Java Programming language enhancements that enable developers with ease of writing and optimizing the Java code.
• Enhancements in the Java Virtual machine to support Non-Java languages.

In this article, we will explore some of those capabilities through code samples.

1. Binary literals

You can use the binary number system (0s and 1s) to express integral types byte, short, int, and long. To specify a binary value, prefix the value with a 0b or 0B.


--------------------- Output ---------------------

a = -88

b = 112

c = 73

d = 1467

2. Underscore literals

To improve readability of numeric literals in the code, you can use underscores between digits to separate a group of digits. You can use as many underscores as you need.


--------------------- Output ---------------------

a = -86

b = 4554

c = 123456789

d = 111222333

e = 11.227799

Java program to create doc/docx file

Apache POI can be used to create a doc/docx file. To know more click here.

You can download latest version of jar files(i.e. poi-bin-3.10-FINAL-20140208.zip) form below link.
http://poi.apache.org/download.html

Add below mentioned Jar files in your classpath -

• poi-3.10-FINAL-20140208.jar
• poi-ooxml-3.10-FINAL-20140208.jar
• poi-ooxml-schemas-3.10-FINAL-20140208.jar
• poi-scratchpad-3.10-FINAL-20140208.jar
• xmlbeans-2.3.0.jar
• dom4j-1.6.1.jar

Please see the self explanatory java code below

Java program to read doc/docx file

Apache POI can be used to read doc/docx file. To know more click here.

You can download latest version of jar files(i.e. poi-bin-3.10-FINAL-20140208.zip) form below link.
http://poi.apache.org/download.html

Add below mentioned Jar files in your classpath -

• poi-3.10-FINAL-20140208.jar
• poi-ooxml-3.10-FINAL-20140208.jar
• poi-ooxml-schemas-3.10-FINAL-20140208.jar
• poi-scratchpad-3.10-FINAL-20140208.jar
• xmlbeans-2.3.0.jar
• dom4j-1.6.1.jar

Please see the self explanatory java code below