Below set of steps involve setting up Tomcat 6 on CentOS 5 with Java 1.6 Download Apache Tomcat $ wget http://apache.parentingamerica.com/tomcat/tomcat-6/v6.0.36/bin/apache-tomcat-6.0.36.tar.gz Go to opt/ folder and extract Tomcat $ cd /opt $ tar -xzf apache-tomcat-6.0.36.tar.gz Create a tomcat user $ useradd -d /opt/apache-tomcat-6.0.36/ tomcatuser Change user permission on tomcat folder $ chown -R tomcatuser:tomcatuser apache-tomcat-6.0.36 (more…)

At the time of writing this article Java 6 (update 37) was available at http://www.java.com/en/download/manual_v6.jsp First set up a folder where you want to install java $ cd /opt $ wget http://download.oracle.com/otn-pub/java/jdk/6u37-b06/jdk-6u37-linux-x64-rpm.bin $ chmod +x jdk-6u37-linux-x64-rpm.bin $ ./jdk-6u37-linux-x64-rpm.bin (more…)

To check the current installation of java $ rpm -qa | grep jre $ rpm -qa | grep jdk $ rpm -qa | grep openjdk To remove the java installs $ yum erase jre jdk openjdk

This error pops up when you try to stop the Tomcat server when the server has not started. If you restart the Tomcat server, the error vanishes.

Main is a static code block and to call a method within the same class you need to declare the other method also as static if you would want to execute the method during run time without instantiating it as an object. Static methods are class methods and the methods without static keyword in them are instance methods.

Buffered Reader - Buffered reader reads text from a character input stream and buffers those characters - Buffered reader has a buffer size of 8 KB - Buffered reader is synchronized and can be safely called from multiple threads - To parse for primitive data types additional functions needs to be called Scanner - Scanner breaks down input into tokens and translates individual tokens according to their data type - Scanner has a buffer size of 1KB - Scanner is not synchronized - Scanner can parse for primitive types and strings using regular expressions Source: http://docs.oracle.com/javase/6/docs/api/java/io/BufferedReader.html http://docs.oracle.com/javase/tutorial/essential/io/scanning.html