Eclipse Spring Boot Build Path Contains Duplicate Entry

Issue

I have been using Eclipse Luna and sprint boot for quite a while. Just today, when I created a new project I am getting the following build error,

Build path contains duplicate entry: 'org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8' for project 'TomcatHttpDemo'

I am not sure if this is related to this problem but I tried

properties> Java Build Path > Libraries

and found that 'JRE System Library[JavaSE-1.8] was listed twice. I deleted one of them and then cleaned and re-built the project. I got a bunch of new errors. These errors were all related to deleting the JRE system library. I even restarted Eclipse several times to clear out any lingering errors.

I was running Luna 4.4 and upgraded to Mars 4.5 but the problem continues to persist. I can build my old projects with no problems at all. Using Luna or Mars the old projects build and execute properly. Any time I try to create a new project I get the duplicate entry error. Any help would be appreciated.

Solution

if i understand your problem it's library issue with your project so

1.Select your project then go to Properties

2.Java build Path

3.in the Top select Libraires

4.add a JRE System Library

5.check the Execution Environment Then Click to Environments

6.On the left click to Installed JREs

7.Then Click To add , Standard VM

8.click To directory Then go to /yourprograms/java/jdk 1.8

9.then Click finish after this check what you just added and click ok

10.when everything is closed update your maven Project

i hope it helps you

Answered By - Kamel Mili