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  1. Prepare
  2. Java
  3. Data Structures
  4. Java Sort
  5. Discussions

Java Sort

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342 Discussions

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  • h2604952343
     + 0 comments
    import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;
import java.util.stream.Collectors;

public class JavaSort {
	public static void main(String[] args) {
		/*
		 * Enter your code here. Read input from STDIN. Print output to STDOUT. Your
		 * class should be named Solution.
		 */
		Scanner sc = new Scanner(System.in);
		int size = sc.nextInt();
		sc.nextLine();
		var list = new ArrayList<Map<String, Map<String, String>>>();
		for (int i = 0; i < size; i++) {
			String[] str = sc.nextLine().split(" ");
			var map = new HashMap<String, String>();
			var map2 = new HashMap<String, Map<String, String>>();
			map.put(str[0], str[2]);
			map2.put(str[1], map);
			list.add(map2);
		}

		var c = list.stream().sorted((a, b) -> {
			String ak = a.keySet().iterator().next();
			String bk = b.keySet().iterator().next();
			Map<String, String> av1 = a.get(ak);
			Map<String, String> bv1 = b.get(bk);
			String ak1 = av1.keySet().iterator().next();
			String bk1 = bv1.keySet().iterator().next();
			int re = bv1.get(bk1).compareTo(av1.get(ak1));
			int re1 = ak1.compareTo(bk1);
			int re2 = ak.compareTo(bk);
			if (re == 0) {
				return re2;
			} else {
				if (re1 == 0) {
					return re2;
				} else {
					return re;
				}
			}
		}).collect(Collectors.toList());
		
		c.forEach(i -> {
			System.out.println(i.keySet().iterator().next());
		});

	}
}

  • juanalv20
     + 0 comments
            
        Comparator<Student> score = new Comparator<Student>() {
            public int compare(Student a, Student b){
                if(a.getCgpa() < b.getCgpa())
                return 1;
                else if(a.getCgpa() > b.getCgpa())
                return -1;
                else if(a.getFname().compareTo(b.getFname()) > 0)
                return 1;
                else if(a.getFname().compareTo(b.getFname()) == 0 && a.getId()<b.getCgpa())
                return 1;                
                else
                return -1;
            } 
        };
        Collections.sort(studentList, score);
      	for(Student st: studentList){
			System.out.println(st.getFname());
		}

  • juanalv20
     + 0 comments
        Comparator<Student> score = new Comparator<Student>() {
        public int compare(Student a, Student b){
            if(a.getCgpa() < b.getCgpa())
            return 1;
            else if(a.getCgpa() > b.getCgpa())
            return -1;
            else if(a.getFname().compareTo(b.getFname()) > 0)
            return 1;
            else if(a.getFname().compareTo(b.getFname()) == 0 && a.getId()<b.getCgpa())
            return 1;                
            else
            return -1;
        } 
    };
    Collections.sort(studentList, score);
    for(Student st: studentList){
        System.out.println(st.getFname());
    }

  • sathish0723
     + 0 comments

    import java.io.; import java.util.; import java.util.stream.Collectors;

    class Details{ int id; String name; double point;

    public Details(int id,String name,double point){
    this.id = id;
    this.name = name;
    this.point = point;
}

public String getName(){
    return name;
}
public int getId(){
    return id;
}
public double getPoint(){
    return point;
}

    }

    public class Main {

    public static void main(String[] args) {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
    Scanner persons = new Scanner(System.in);
    int numberOfPersons = persons.nextInt();

   List<Details> students = new ArrayList<>();



    for(int i=0;i<numberOfPersons;i++){
        int id = persons.nextInt();
        String name = persons.next();
        double point = persons.nextDouble();
         students.add(new Details(id, name, point));

    }
    persons.close();

   List<Details> answer = students.stream().sorted(Comparator.comparingDouble(Details::getPoint).reversed().thenComparing(Details::getName).thenComparingInt(Details::getId)).collect(Collectors.toList());

  answer.forEach(student->System.out.println(student.name));


}

    }

  • gschandhru10
     + 0 comments
    import java.io.*;
import java.util.*;

public class Solution {

    public static void main(String[] args) {
        /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
        Scanner sc = new Scanner(System.in);
        int totalnumberOfStudents = sc.nextInt();
        List<HashMap <String,String> > listOfMap = new  ArrayList<>();
        sc.nextLine();
        for(int i = 1; i <= totalnumberOfStudents; i++){
            HashMap<String,String> map = new HashMap<>();
            String studentDetails = sc.nextLine();
            String [] studentDetailsArr = studentDetails.split(" ");
            map.put("id", studentDetailsArr[0]);
            map.put("Name", studentDetailsArr[1]);
            map.put("cgpa", studentDetailsArr[2]);
            listOfMap.add(map);
        }
listOfMap.sort(Comparator
    .comparingDouble((Map<String, String> item) -> Double.parseDouble(item.get("cgpa")))
    .reversed()
    .thenComparing((Map<String, String> item) -> item.get("Name"))
    .thenComparing((Map<String, String> item) -> Integer.parseInt(item.get("id"))));

for(Map<String,String> names : listOfMap){
    System.out.println(names.get("Name"));
}

    }
}