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/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		String[][] students = {{"Bobby", 87}, {"Charles", 100}, {"Eric", 64}, 
                               {"Charles", 22}};
 
		Map<String, List<Integer>> map = new HashMap<>();
		List<Integer> score1 = new ArrayList<>();
		for(int i=0; i<students.length; i++) {
		    score1.add(students[i][1]);
		    map.put(students[i][0], score1);
		}
	}
}

Main.java:12: error: incompatible types: int cannot be converted to String
		String[][] students = {{"Bobby", 87}, {"Charles", 100}, {"Eric", 64}, 
		                                 ^
Main.java:12: error: incompatible types: int cannot be converted to String
		String[][] students = {{"Bobby", 87}, {"Charles", 100}, {"Eric", 64}, 
		                                                  ^
Main.java:12: error: incompatible types: int cannot be converted to String
		String[][] students = {{"Bobby", 87}, {"Charles", 100}, {"Eric", 64}, 
		                                                                 ^
Main.java:13: error: incompatible types: int cannot be converted to String
                               {"Charles", 22}};
                                           ^
Main.java:18: error: no suitable method found for add(String)
		    score1.add(students[i][1]);
		          ^
    method Collection.add(Integer) is not applicable
      (argument mismatch; String cannot be converted to Integer)
    method List.add(Integer) is not applicable
      (argument mismatch; String cannot be converted to Integer)
Note: Some messages have been simplified; recompile with -Xdiags:verbose to get full output
5 errors

Standard output is empty