How to change JDK version for an Eclipse project

Question

I need to write a project that s only compatible with Java 1 5  I have Java 1 6 installed  Is there some form of backwards compatibility to get Eclipse to compile with 1 5   Do I have to install Java 1 5 to get it to show here  Or maybe there is another way

User · Answer

See the page Set Up JDK in Eclipse  From the add button you can add a different version of the JDK

User · Answer

If you are using maven build tool then add the below properties to it and doing a maven update will solve the problem   lt properties gt       lt maven compiler source gt 1 8 lt  maven compiler source gt       lt maven compiler target gt 1 8 lt  maven compiler target gt   lt  properties gt

User · Answer

The JDK  JAVA HOME  used to launch Eclipse is not necessarily the one used to compiled your project   To see what JRE you can select for your project  check the preferences   General   Java Installed JRE  By default  if you have not added any JRE  the only one declared will be the one used to launched Eclipse  which can be defined in your eclipse ini      You can add any other JRE you want  including one compatible with your project   After that  you will need to check in your project properties  or in the general preferences  what JRE is used  with what compliance level     source  standartux fr

User · Answer

Click on the Add Library button  It brings your screen to point to the Java location   Select  Directory   button right besides JRE home and point to the installed folder location   Even though you want to just 1 5 compiler project  you can achieve it by changing compiler settings in Eclipse instead of removing 1 6 JRE and add 1 5 JRE   GOTO -- gt JAVA--Compiler--- gt  and change compiler level to  1 5  instead of  1 6    As davidfmatheson suggested   Just be careful  especially if you re setting this up for a team of people to work on  If anyone uses anything that is new or changed in 1 6  it will compile  but not run in an environment with JRE 1 5

User · Answer

Click on the Window tab in Eclipse  go to Preferences and when that window comes up  go to Java   Installed JREs   Execution Environment and choose JavaSE-1 5  You then have to go to Compiler and set the Compiler compliance level

User · Answer

Right click project -  Properties -  Java Build Path -  select JRE System Library click Edit and select JDK or JRE after then click Java Compiler and select  Compiler compliance level to 1 8

User · Answer

As I was facing this issue minutes ago  in case you are trying to open an existing project in an environment with a newer JDK  make sure you pdate the JDK version in Project Properties -  Project Facets -  Java

User · Answer

Eclipse - specific Project change JDK Version -  If you want to change any jdk version of A specific project than you have to click ---  Project --  JRE System Library --  Properties ---  Inside Classpath Container  JRE System Library  change the Execution Environment to which ever version you want e g  1 7 or 1 8

User · Answer

In the preferences section under Java -  Installed JREs click the Add button and navigate to the 1 5 JDK home folder   Then check that one in the list and it will become the default for all projects

[java] How to change JDK version for an Eclipse project

Examples related to java

Examples related to eclipse

Examples related to jar