I am trying to generate my project doc , and got an error on a java.lang
Loading source files for package com.swimtechtest.swimmer...
Loading source files for package com.swimtechtest.swimmer.math...
Loading source files for package com.swimtechtest.swimmer.database...
Loading source files for package com.swimtechtest.swimmer.helpers...
Constructing Javadoc information...
com.sun.tools.javac.util.FatalError: Fatal Error: Unable to find package java.lang in classpath or bootclasspath
at com.sun.tools.javac.comp.MemberEnter.importAll(MemberEnter.java:123)
at com.sun.tools.javac.comp.MemberEnter.visitTopLevel(MemberEnter.java:509)
at com.sun.tools.javac.tree.JCTree$JCCompilationUnit.accept(JCTree.java:446)
at com.sun.tools.javac.comp.MemberEnter.memberEnter(MemberEnter.java:387)
at com.sun.tools.javac.comp.MemberEnter.complete(MemberEnter.java:819)
at com.sun.tools.javac.code.Symbol.complete(Symbol.java:384)
at com.sun.tools.javac.code.Symbol$ClassSymbol.complete(Symbol.java:766)
at com.sun.tools.javac.comp.Enter.complete(Enter.java:464)
at com.sun.tools.javac.comp.Enter.main(Enter.java:442)
at com.sun.tools.javadoc.JavadocEnter.main(JavadocEnter.java:53)
at com.sun.tools.javadoc.JavadocTool.getRootDocImpl(JavadocTool.java:152)
at com.sun.tools.javadoc.Start.parseAndExecute(Start.java:330)
at com.sun.tools.javadoc.Start.begin(Start.java:128)
at com.sun.tools.javadoc.Main.execute(Main.java:41)
at com.sun.tools.javadoc.Main.main(Main.java:31)
javadoc: error - fatal error
1 error