Task 11 — Сортировка студентов

package Task11;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class Connection {
    String name;
    int age;

    public Connection(String name, int age) {
        this.name = name;
        this.age = age;
    }


    public static void main(String[] args){
        List<String[]> c =new ArrayList<>();

        c.add(new String[]{"Max", "10"});
        c.add(new String[]{"Nicolai", "20"});
        c.add(new String[]{"Tolic", "19"});
        c.add(new String[]{"Dane", "17"});

        List<String[]> r = new ArrayList<>();
        r.add(new String[]{"Denes","23"});
        r.add(new String[]{"Dasha", "30"});
        r.add(new String[]{"Oleg", "27"});
        //c.addAll(r);
        //System.out.print(c);
        List<String[]> t = mergeSort(c, r);
        for (String[] d: t){
            System.out.println("[" +d[0]+", "+d[1] +"]");
        }
    }
    private static List<String[]> mergeSort(List<String[]> c, List<String[]> r) {
        if (c.size()<=1 && r.size()<=1){
            return merge(c, r);
        }
        int m1 = c.size()/2;
        int m2 = r.size()/2;
        List<String[]> left1 = c.subList(0, m1);
        List<String[]> right1 = c.subList(m1, c.size());
        List<String[]> left2 = r.subList(0,m2);
        List<String[]> right2 = r.subList(m2, r.size());
        List<String[]> sortleft = mergeSort(left1, left2);
        List<String[]> sortright = mergeSort(right1, right2);
        return merge(sortleft, sortright);
    }
    public static List<String[]> merge(List<String[]> left, List<String[]> right) {
        List<String[]> result = new ArrayList<>();
        int i = 0;
        int j = 0;
        while (i < left.size() && j < right.size()) {
            if (Integer.parseInt(left.get(i)[1]) < Integer.parseInt(right.get(j)[1])) {
                result.add(left.get(i));
                i++;
            } else {
                result.add(right.get(j));
                j++;
            }
        }
            while (i < left.size()) {
                result.add(left.get(i));
                i++;
            }
            while (j < right.size()) {
                result.add(right.get(j));
                j++;
            }
        return result;
    }
}

package Task11;
import java.util.*;
public class SortingStudentsByGPA implements Comparable<SortingStudentsByGPA>{
    public String name;
    public int bal;

    public SortingStudentsByGPA(String name, int bal) {
        this.name = name;
        this.bal = bal;
    }

    @Override
    public int compareTo(SortingStudentsByGPA o) {
        return o.bal - this.bal;
    }
    public static void main(String[] args){
        List<SortingStudentsByGPA> r = new ArrayList<>();
        r.add(new SortingStudentsByGPA("Nicolai", 123));
        r.add(new SortingStudentsByGPA("Oleg", 200));
        r.add(new SortingStudentsByGPA("Sasha", 260));
        r.add(new SortingStudentsByGPA("Nikita", 250));
        Collections.sort(r);
        for (SortingStudentsByGPA s : r){
            System.out.println(s.name+ " Баллы "+s.bal);
        }
    }
}

package Task11;

public class Student {
    String name;
    int iDNumber;

    public Student(String name, int iDNumber) {
        this.name = name;
        this.iDNumber = iDNumber;
    }
    public void setName(String name){
        this.name=name;
    }
    public String getName(){
        return name;
    }
    public int getiDNumber() {
        return iDNumber;
    }
    public void setiDNumber(int iDNumber) {
        this.iDNumber = iDNumber;
    }
    public static void main(String[] args){
        Student[] s = new Student[6];
        s[0]=new Student("Sol",1);
        s[1]=new Student("Pol",2);
        s[2]=new Student("Kol",3);
        s[3]=new Student("Tol",7);
        s[4]=new Student("Fol",0);
        s[5]=new Student("Rol",4);
        for(int i = 1; i < s.length; i++){
            Student current = s[i];
            int j = i-1;
            while (j>=0 && s[j].getiDNumber() > current.getiDNumber()){
                s[j+1]=s[j];
                j--;
            }
            s[j+1]=current;
        }
        System.out.println("     ");
        for(Student f: s){
            System.out.println("Name: "+f.getName()+" id: "+f.getiDNumber());
        }
    }
}