SOS PLEASE FRIENDS OF JAVA

Good morning, how are you ?Last night i have been trying for two
hours to compile a quite big application in Java and i didn't do
anything!Could i have your help ?The application named GDB.java finds
the maximum and minimum grade of a class and the average grade and
stores these into arrays. The compiler error is illegal start of
expression at line public void outputGrades(){ .
 The program is:
                public class GDB{
    private String courseName;
    private int grades[][];
    public GDB(String name,int gradesArray[][]){
        courseName=name;
        grades=gradesArray;

    }
    public void setCourseName(String name){
        courseName=name;
    }
    public String getCourseName(){
        return courseName;
    }
    public void displayMessage(){
        System.out.printf("welcome to the GDB for \n%s!\n
\n",getCourseName());

    }
    public void processGrades(){
        outputGrades();
        System.out.printf("\n%s %d\n%s %d\n\n","min= ",getMinimum(),"max=
",getMaximum());
        outputBarChart();
    }
    public int getMinimum(){
        int lowGrade=grades[0][0];
        for(int studentGrades[]:grades){
            for(int grade:studentGrades){
                if(grade<lowGrade)
                 lowGrade=grade;
            }
        }
        return lowGrade;
    }
    public int getMaximum(){
        int highGrade=grades[0][0];
        for(int studentGrades[]:grades){
            for(int grade:studentGrades){
                if(grade>highGrade)
                 highGrade=grade;
            }
        }
        return highGrade;

    }
    public double getAverage(int setOfGrades[]){
        int total=0;
        for(int grade:setOfGrades)
         total+=grade;
         return (double)total/setOfGrades.length;
    }
    public void outputBarChart(){
        System.out.println("pantelh katanomh bathmon :");
        int frequency[]=new int[11];
        for(int studentGrades[]:grades){
            for(int grade:studentGrades)
              ++frequency[grade/10];
        }
        for(int count=0;count<frequency.length;count++){
            if(count==10)
              System.out.printf("%5d: ",100);
            else
              System.out.printf("%02d-%02d ",count*10,count*10+9);

            for(int stars=0;stars<frequency[count];stars++)
                System.out.print("*");
            System.out.println();

        }
   public void outputGrades()
   {
      System.out.println( "The grades are:\n" );
      System.out.print( " " ); // align column heads

      // create a column heading for each of the tests
      for ( int test = 0; test < grades[0].length; test++ )
         System.out.printf( "Test %d ", test + 1 );

      System.out.println( "Average" ); // student average column
heading

      // create rows/columns of text representing array grades
      for ( int student = 0; student < grades.length; student++ )
      {
         System.out.printf( "Student %2d", student + 1 );

         for ( int test : grades[ student ] ) // output student's
grades
            System.out.printf( "%8d", test );

         // call method getAverage to calculate student's average
grade;
         // pass row of grades as the argument to getAverage
         double average = getAverage( grades[ student ] );
         System.out.printf( "%9.2f\n", average );
      } // end outer for
   } // end method outputGrades
} // end class GradeBook