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New To Java


How to check Java installed in my system


Hi All                     I new to java i have not some doubts 1)In my system I have this many JDK  i dont know for this JDK what IDE version i need to download. I like to use netbeans which one should i need to download? C:\Program Files\Java\jdk1.5.0_01 C:\Program Files\Java\jdk1.6.0_22 C:\Program Files\Java\jre1.5.0_01 C:\Program Files\Java\jre6  But i dont have any IDE to develop my java like eclipse or Netbean etc ,I have Only Jdeveloper 9.0.3.5  2)How to find apache tomcat server is installed in by PC or not how to test that ?  please know the installion steps also in need to install ..  Advance Thanks Aarasu

I like to use netbeans which one should i need to download? You'd think you would go to the Netbeans website and find out, but I'm silly like that. Either a recent JDK 6 or the latest JDK 7 will do just fine. I would install Java anywhere except in program files. I install all my Java stuff in a directory called "java" myself, so I have C:\java\jdk6, c:\java\eclipse37, c:\java\tomcat7, etc. I never have to search for my stuff that way.  (of course being a proper computer savvy user I partioned my harddrive to reserve the C drive specifically for the OS only, so it is in fact e:\java).  2)How to find apache tomcat server is installed in by PC or not how to test that ? Use the search function of your OS of course. Its not even a Java related question.

Hi Friend                    Thanks for your Info  I was trying to ask I'm already have  jdk1.5.0_01 & jdk1.6.0_22 in System , If I am download  NetBeans IDE 7.1.2  Java EE This download includes GlassFish Server Open Source Edition 3.1.2, and Apache Tomcat 7.0.22 software.  Will it repalce the JDK 1.5 or 1.6 which is in my system or ll it affect the privious version  Thanks Aarasu

No, Tomcat and your IDE will not replace your JDK. Open a Dos command window and type 'java -version' to see what version of java is used.  If it doesn't show anything, you need to create environment variables called JAVA_HOME and CATALINA_HOME (for Tomcat), then alter the PATH variable. This is described in the home pages for JDK and Tomcat, along with other setup directions. Similarly, for Eclipse.


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