java scanner 오류

txt파일에는 아래와 같이 저장되어 있습니다. 점수가 가장 높은 학생의 이름을 출력해야하고 점수가 동일할 경우 모두 출력하는 프로그램입니다.

김일번 64

김이번 83

김삼번 26

김사번 36

김오번 78

김육번 54

김칠번 60

김팔번 85

김구번 45

김십번 85

프로그램을 실행했을 때

Exception in thread "main" java.util.InputMismatchException

at java.base/java.util.Scanner.throwFor(Scanner.java:947)

at java.base/java.util.Scanner.next(Scanner.java:1602)

at java.base/java.util.Scanner.nextInt(Scanner.java:2267)

at java.base/java.util.Scanner.nextInt(Scanner.java:2221)

이렇게 오류가 발생합니다. 해결방법 아시는 분 가르쳐주세요!!ㅜㅜ

package kh;

import java.io.*;
import java.util.Scanner;

class Student
{
	//int id;
	String name;
	int grade;
	Student(String name, int grade)
	{
		//this.id=id; 
		this.name=name; 
		this.grade=grade;
	}
}
class StudentTable{
	Student[] st;
	StudentTable(int size)
	{
		st=new Student[size];	
	}
	void maxStudent()
	{
		int maxGrade=0;
		for(Student student : st) 
		{
			if(student.grade > maxGrade) 
			{
				maxGrade = student.grade;
			}
		}
		 System.out.println("최고 점수를 가진 학생:");
		 for(Student student : st) 
		 {
			 if(student.grade == maxGrade)
			 {
				 System.out.println(" " + student.name + " " + student.grade);
			 }
		 }
	}
}
public class homework05{
	public static void main(String[] args) {
		StudentTable stable;
		try {
			FileInputStream fin=new FileInputStream("C:\\Users\\user\\Desktop\\student_score.txt");
			Scanner scanner = new Scanner(fin);
			int size=scanner.nextInt();
			
			stable=new StudentTable(size);
			
			for(int i=0; i<stable.st.length; i++)
			{
				//int id=scanner.nextInt();
				String name=scanner.next();
				int grade=scanner.nextInt();
				
				stable.st[i]=new Student(name,grade);
				
				
				System.out.println(" "+name+" "+grade);
			}
			scanner.close();
			stable.maxStudent();
		}
		catch(FileNotFoundException e) 
		{
			System.out.println("file not exist");
		}
	}
}

import java.io.*;
import java.util.ArrayList;
import java.util.Scanner;

class StudentTable{
	ArrayList<Student> st = new ArrayList<>();

	void maxStudent() {
		int maxGrade = 0;
		for(Student student : st) {
			if(student.grade > maxGrade) {
				maxGrade = student.grade;
			}
		}
		System.out.println("최고 점수를 가진 학생:");
		for(Student student : st) {
			if(student.grade == maxGrade) {
				System.out.println(" " + student.name + " " + student.grade);
			}
		}
	}
}

public class homework05 {
	public static void main(String[] args) {
		StudentTable stable = new StudentTable();
		try {
			FileInputStream fin = new FileInputStream("C:\\Users\\user\\Desktop\\student_score.txt");
			Scanner scanner = new Scanner(fin);

			while (scanner.hasNext()) {
				String name = scanner.next();
				int grade = scanner.nextInt();
				stable.st.add(new Student(name, grade));
			}
			scanner.close();
			stable.maxStudent();
		} catch (FileNotFoundException e) {
			System.out.println("file not exist");
		}
	}
}