Help in assign-solve errors

Question

hi,
I am new to java and and struggling with this program i have to complete for next week.
I have create a person class. And a student class which inherit from person class.
When compiling i get 2 errors.
lec.java:126: non-static variable this cannot be referenced from a static context
                         std[i] = new Student("1","1",1);
^
lec.java:90: inner classes cannot have static declarations
public static void main(String Args[])throws IOException{
Hope someone can help me in solving this problem :)
the codes are:
import java.io.*;
//******************************************************8
//******************************************************8
//+++++++++++++++
class Person{
     String Fullname;
     //String Empno;
Person(String Fullname){//,String Empno
     this.Fullname=Fullname;
     //this.Empno=Empno;
public void set_Fullname(String Fullname)
     this.Fullname=Fullname;
//public void set_Empno(String Empno)
     //this.Empno=Empno;
public String get_Fullname()
     return this.Fullname;
//public String get_Empno()
     //return this.Empno;
//+++++++++++++
//++
public class Student extends Person{
private String StudentNo;
private float grade;
//Student(){};
public Student(String Fullname, String StudentNo, float grade){
     super(Fullname);
     this.StudentNo=StudentNo;
     this.grade=grade;
public void set_StudentNo(String StudentNo)
     this.StudentNo=StudentNo;
public String get_StudentNo()
     return this.StudentNo;
public void set_grade(float grade)
     this.grade=grade;
public float get_grade()
     return this.grade;
//************************************************main menu
//77
public class sophie
public static void main(String Args[])throws IOException{
BufferedReader br= new BufferedReader(new InputStreamReader (System.in));
String str;
int max=100;
Student std[] = new Student[max]; //Declare 10 persons..
int option,i;
float grade;
i=0;
/**for (int i = 0; i<5; i++){
System.out.println("************************");
System.out.println("I AM STUDENT "+i);
System.out.println(std.get_Surname());
System.out.println(std[i].get_Othername());
System.out.println(std[i].get_Course());
System.out.println("************************");
do {
System.out.println("*************MAIN MENU ***********");
System.out.println("1. ADD ENTITY");
System.out.println("2. PRINT ALL ENTITY");
System.out.println("3. PRINT SOCIAL EVENT LISTS");
System.out.println("4. Exit");
System.out.println("************************");
System.out.println("PLEASE ENTER OPTION ::> ");
str = br.readLine();
option=Integer.parseInt(str);
switch(option)
     case 1: {
          System.out.println("DISPLAY ADD MENU");
                    System.out.println("************************");
                         std[i] = new Student("1","1",1);
                         System.out.print("Please Enter Fullname::> ");
                         str = br.readLine();
                         std[i].set_Fullname(str);
                         System.out.print("Please Enter Student No::> ");
                         str = br.readLine();
                         std[i].set_StudentNo(str);
                         System.out.print("Please Enter average grade ::> ");
                         str = br.readLine();
                         grade= Float.parseFloat(str);
                         std[i].set_grade(grade);
                         System.out.println("************************");
          i=i+1;
          break;
          //nnnnnnnn
//case for student
          //nnnnnnnn
     case 2:     {
               System.out.println("YOU ARE IN OPTION PRINT ALL");
for (int stdno = 0; stdno<i; stdno++)
System.out.println("************************");
               System.out.println("I AM STUDENT "+stdno);
               System.out.println("Fullname ::> "+std[stdno].get_Fullname());
               System.out.println("Student No ::> "+std[stdno].get_StudentNo());
               System.out.println("Grade Point Average ::> "+std[stdno].get_grade());
               System.out.println("************************");
               break;
case 3:
               System.out.println("YOU ARE IN OPTION PRINT SOCIAL EVENTS");
for (int stdno = 0; stdno<i; stdno++)
          if (std[stdno].get_grade()>3.7)
          System.out.println("************************");
                         System.out.println("I AM STUDENT "+stdno);
                         System.out.println("Fullname ::> "+std[stdno].get_Fullname());
                         System.out.println("Student No ::> "+std[stdno].get_StudentNo());
                         System.out.println("Grade point Average ::> "+std[stdno].get_grade());
                         System.out.println("************************");
          break;
//+++++++++==
}//end switch
}while (option!=4);

Answer 1

In addition to my previous suggestions (see http://forum.java.sun.com/thread.jsp?forum=54&thread=562390&tstart=0&trange=15), also ensure that all your brackets are matched. where are Person and Student classes located? try to put them in their own files, not where your main method is located.