Multiple markers at this line
- Implicit super constructor Object() is undefined for default constructor. Must
define an explicit constructor
- The hierarchy of the type FirstController is inconsistent
Implicit super constructor Object () is undefined for default constructor Must define an explicit constructor.
Solution: the java libraries loaded into it, right click and choose Properties on the Project -> Java Build Path of Libraries-> Add Library to select JRE System Library- > click next-> select Execution environment and select the version or workspace default jre-> click Finish.
