Help on a programs error messages

Hi experts I am receiving the following subsequent syntax messages:
illegal start of expression public void display menu()
(with arrow pointing to the 'p')
and also
';' expected } (with arrow also pointing to the })
This is my code which causes the error message:
public class InsyStudent extends Student
{
public InsyStudent( String fName, String lName, String ssn )
{
int midTerm;
int finalExam;
int researchProject;
int presentationScore;
public void display_menu()
{
System.out.println( "1) INSY 3305n2) INSY 3305n3) INSY 4304");
System.out.println("4) INSY 4305n5) INSY 4310n6) INSY 4320n" );
}
This is my code for the last error message:
public String toString()
{
return String. format( "%s %st% s", super. To String (), select Course() );
}
}
What should I do? Please help.
Thanks a lot.
