Execution failed for task ':examples:DaoExample:greendao'.

[tigerjiang]

I execute the gradlew then the error occur as below:
jiangzehus-iMac:greenDAO-master jiangzehu$ ./gradlew clean assembledebug

Configure project :
Signing information missing/incomplete for DaoCore
Signing information missing/incomplete for DaoGenerator
Signing information missing/incomplete for examples
Signing information missing/incomplete for greendao-api
Signing information missing/incomplete for tests
Signing information missing/incomplete for DaoExample
Signing information missing/incomplete for RxDaoExample
Signing information missing/incomplete for DaoTest
Signing information missing/incomplete for DaoTestBase
Signing information missing/incomplete for DaoTestEntityAnnotation
Signing information missing/incomplete for DaoTestGenerator
Signing information missing/incomplete for DaoTestPerformance

Configure project :DaoCore
Settings sonatypeUsername/sonatypePassword missing/incomplete for DaoCore

Configure project :DaoGenerator
Settings sonatypeUsername/sonatypePassword missing/incomplete for DaoGenerator

Configure project :examples
Settings sonatypeUsername/sonatypePassword missing/incomplete for examples

Configure project :greendao-api
Settings sonatypeUsername/sonatypePassword missing/incomplete for greendao-api

Configure project :tests
Settings sonatypeUsername/sonatypePassword missing/incomplete for tests

Configure project :examples:DaoExample
Settings sonatypeUsername/sonatypePassword missing/incomplete for DaoExample

Configure project :examples:RxDaoExample
Settings sonatypeUsername/sonatypePassword missing/incomplete for RxDaoExample

Configure project :tests:DaoTest
Settings sonatypeUsername/sonatypePassword missing/incomplete for DaoTest

Configure project :tests:DaoTestBase
Settings sonatypeUsername/sonatypePassword missing/incomplete for DaoTestBase

Configure project :tests:DaoTestEntityAnnotation
Settings sonatypeUsername/sonatypePassword missing/incomplete for DaoTestEntityAnnotation

Configure project :tests:DaoTestGenerator
Settings sonatypeUsername/sonatypePassword missing/incomplete for DaoTestGenerator

Configure project :tests:DaoTestPerformance
Settings sonatypeUsername/sonatypePassword missing/incomplete for DaoTestPerformance

Task :examples:DaoExample:greendao FAILED
Found 6 problem(s) parsing "/Users/jiangzehu/work/greenDAO-master/examples/DaoExample/src/main/java/org/greenrobot/greendao/example/Note.java":
#1 @1: Pb(324) The type java.lang.Object cannot be resolved. It is indirectly referenced from required .class files (ID: 16777540; error: true)
#2 @1: Pb(324) The type java.lang.String cannot be resolved. It is indirectly referenced from required .class files (ID: 16777540; error: true)
#3 @1: Pb(324) The type java.lang.Class cannot be resolved. It is indirectly referenced from required .class files (ID: 16777540; error: true)
#4 @30: Pb(143) Implicit super constructor Object() is undefined. Must explicitly invoke another constructor (ID: 134217871; error: true)
#5 @33: Pb(143) Implicit super constructor Object() is undefined. Must explicitly invoke another constructor (ID: 134217871; error: true)
#6 @38: Pb(143) Implicit super constructor Object() is undefined. Must explicitly invoke another constructor (ID: 134217871; error: true)

FAILURE: Build failed with an exception.

• What went wrong:
  Execution failed for task ':examples:DaoExample:greendao'.

Found 6 problem(s) parsing "/Users/jiangzehu/work/greenDAO-master/examples/DaoExample/src/main/java/org/greenrobot/greendao/example/Note.java". First problem:
Pb(324) The type java.lang.Object cannot be resolved. It is indirectly referenced from required .class files (16777540 at line 1).
Run gradle with --info for more details.

• Try:
  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

• Get more help at https://help.gradle.org

BUILD FAILED in 3s

[greenrobot-team]

Are you using a newer JDK? Try to explicitly use JDK 8 when compiling.

[greenrobot-team]

Duplicate of #1014. Closing in favor as it has more details.