ExamScore

package june22;

import java.util.Map;
import java.util.Scanner;
import java.util.TreeMap;

import javax.xml.crypto.dsig.keyinfo.KeyValue;

public class ExamResults {

        public static void main(String[] args) {
                Scanner input = new Scanner(System.in);

                for (int i = 0; i < 3; i++) {
                        input.nextLine();
                }
                TreeMap<Integer, TreeMap<String, Double>> mapmap = new TreeMap<>();

                while (true) {
                        String nextStudent = input.nextLine();
                        if (nextStudent.contains("-")) {
                                break;
                        }
                        String[] container = nextStudent.split("[^a-zA-Z0-9.]+");
                        String name = container[1] + " " + container[2];
                        int score = Integer.parseInt(container[3]);
                        double mark = Double.parseDouble(container[4]);

                        double tempValue = 0.0;

                        if (mapmap.get(score) == null) {
                                mapmap.put(score, new TreeMap<>());
                                mapmap.get(score).put(name, mark);
                        }
                        else {
                                if (mapmap.get(score).get(name) == null) {
                                        mapmap.get(score).put(name, mark);
                                }
                                else {
                                        tempValue = mapmap.get(score).get(name) + mark;
                                        mapmap.get(score).put(name, tempValue);
                                }
                        }
                }

                for (Map.Entry<Integer, TreeMap<String, Double>> p : mapmap.entrySet()) {
                        System.out.print(p.getKey() + " -> ");

                        Map<String, Double> temp = p.getValue();
                        String output = temp.toString().replaceAll("[(=0-9.0-2+)]", "").replace('{', '[').replace('}', ']');
                        System.out.print(output);
                        double sum = 0.0;
                        int size = 0;
                        for (Map.Entry<String, Double> k : temp.entrySet()) {
                                double current = k.getValue();
                                sum += current;
                                size++;
                        }

                        System.out.printf("; avg=%.2f\n", sum / size);
                }
        }

}