plz check my codings are correct or not...There is an error..i cant find it..

import java.util.Scanner;
public class Student
{
  private String indexNo;
  private String gender;
  private char initial;
  private int mark1;
  private int mark2;
  private int mark3;
  private int max;

  public Student(String newIndexNo, String newGender, char newInitial, int newMark1, int newMark2, int newMark3)

    {
        indexNo=newIndexNo;
            gender=newGender;
        initial=newInitial;
        mark1=newMark1;
        mark2=newMark2;
        mark3=newMark3;
    }

  public void setIndex(String newIndex)
    {
        indexNo=newIndex;
    }

  public void setGender(String newGender)
    {
        gender=newGender;
    }

  public void setInitial(char newInitial)
    {
        if(newInitial != 'f' || newInitial != 'm')
        initial='m';
    }

  public void setMark1(int newMark1)
    {
        if(newMark1<0 || newMark1>100)
        mark1=0;
    }

  public void setMark2(int newMark2)
    {
        if(newMark2<0 || newMark2>100)
        mark2=0;
    }

  public void setMark3(int newMark3)
    {
        if(newMark3<0 || newMark3>100)
        mark3=0;
    }

  public String getIndex()
    {
        return indexNo;
    }

  public String getGender()
    {
        return gender;
    }

  public char getInitial()
    {
        return initial;
    }

  public int getMark1()
    {
        return mark1;
    }

  public int getMark2()
    {
        return mark2;
    }

  public int getMark3()
    {
        return mark3;
    }




  public void read()
    {
        Scanner text= new Scanner(System.in);
        Scanner num=new Scanner(System.in);

        System.out.print("Enter your index No: ");
        indexNo=text.nextLine();
        System.out.print("Enter your Gender: ");
        gender=text.nextLine();
        initial=gender.charAt(0);
        System.out.print("Enter your mark 1: ");
        mark1=num.nextInt();
        System.out.print("Enter your mark 2: ");
        mark2=num.nextInt();
        System.out.print("Enter your mark 3: ");
        mark3=num.nextInt();
    }

  public void maxMarks()
    {

    if(mark1>mark2 && mark1>mark3)
            max=mark1;
    else
        if(mark2>mark1 && mark2>mark3)
            max=mark2;   
    else
            max=mark3;  

    }


  public void display()
    {
        System.out.printf("%s %c %d %d %d",indexNo,initial,mark1,mark2,mark3);
        System.out.print("          ");
        System.out.printf("Index No %s,You earned %d",indexNo,max);
    }

}//end of class


import java.lang.String;
public class StudentTest
{
  public static void main(String args[])
    {
    Student stu = new Student("AS2010461",'f',"AS2010461",80);
    stu.getIndex();
    stu.getGender();
    stu.getInitial();
    stu.getMark1();
    stu.getMark2();
    stu.getMark3();
    stu.read();
    stu.maxMarks();
    stu.display();
    }
}


import java.util.Scanner;
public class Results
 {
    Scanner kbd=new Scanner(System.in);

    int maxMarks;

        StudentTest stu1=new StudentTest();

        if (maxMarks>90)
            System.out.print("Excellent");
        else if (maxMarks<50)
            System.out.print("Try again");
        else if (maxMarks<=90 && initial='f')
            System.out.print("Good girl");
        else
            System.out.print("Good boy");

public void display1()
      {
        System.out.printf("%s %c %d %d %d",indexNo,initial,mark1,mark2,mark3);
    System.out.print("          ");
    System.out.printf("Index No %s,You earned %d",indexNo,max);
      }
}