What is the error in removestudent method?

Team Jools Window Help Search (Ctri +1) xBadent,carse Test.yax. Clack.prva Testi ployees.y va TeraJoe Jestpr a mst der t-ma x x course-pr a ) return -1: public void addStodent (Student a) if (haveStudent (s) co) studentlList.add (a): public Stude, t tor (in remove s tndnnt(studen c -0: iatudentliot.ize)++) it (a.getName ) equala (atudentt.iot.get ().gethame )) 4&s.getID) equals (studentLiat.get (1).getIDO)) studentLint.remove (a) return :) return null; public vold printlist) ( Team Jools Window Help Search (Ctri +1) xBadent,carse Test.yax. Clack.prva Testi ployees.y va TeraJoe Jestpr a mst der t-ma x x course-pr a ) return -1: public void addStodent (Student a) if (haveStudent (s) co) studentlList.add (a): public Stude, t tor (in remove s tndnnt(studen c -0: iatudentliot.ize)++) it (a.getName ) equala (atudentt.iot.get ().gethame )) 4&s.getID) equals (studentLiat.get (1).getIDO)) studentLint.remove (a) return :) return null; public vold printlist) (