Question

Write a java code snippet that allows a teacher to track her students’ grades. Use a loop to prompt the user for each student’s name and the grade they received. Add these values to two separate parallel ArrayLists. Use a sentinel to stop. Output a table listing each of the student’s names in one column and their associated grades in the second column.

Answer 1

Here I use two separate List for store name and grade.

names is use for store name.

grades is use for store grade.

For creating list in java

import java.util.List;

List<String> names = new ArrayList<String>(); //use for store name 
List<String> grades = new ArrayList<String>();//use for store grade 

Here string is a type of list.

Printf() is use for formatting the output in table form.

code:

import java.util.*;



public class studentGrades{
    
    public static void main(String[] args) {
        
        String f = "y"; //Flag for next Entry 
        
        Scanner sc = new Scanner(System.in);//use for taking input
        
        List<String> names = new ArrayList<String>(); //use for store name 
        List<String> grades = new ArrayList<String>();//use for store grade 
        
        while(f.equals("y")){//check condition for continue
            String name,grade;
            
            System.out.print("\nEnter Student name: ");
            //taking name from user
            name = sc.next();
            System.out.print("Enter Student grade: ");
            //taking grade from user
            grade = sc.next();
            
            //add name into list
            names.add(name);
            
            //add grade into list
            grades.add(grade);
            
            //ask user for continue enter name and grade or not
            System.out.print("\nAre you want to continue?(y/n): ");
            f = sc.next();
        }
        
        //formating table 
        System.out.println("\n-------------------------------------");
        System.out.printf("%10s %20s", "NAME", "GRADE");
        System.out.println();
        System.out.println("-------------------------------------");
        
        for(int i = 0; i < names.size();i++){
            //print name and grade from the list
            System.out.printf("%10s %20s\n", names.get(i), grades.get(i));
        }
    }
    
}

Output:

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