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Java Program to Sort ArrayList of Custom Objects By Property

  • Last Updated : 17 Nov, 2020

Here we are going to look at the approach of sorting an ArrayList of custom objects by using a property.


1. Create a getter function which returns the value stored in the class variable.

2. Create a list and use sort() function which takes the values of the list as arguments and compares them with compareTo() method.

3. This function will then return a positive number if the first argument’s property is greater than the second’s, negative if it is less and zero if they are equal.



// Java Program to Sort ArrayList of Custom Objects By
// Property
import java.util.*;
public class Main {
    private String value;
    public Main(String val) { this.value = val; }
    // Defining a getter method
    public String getValue() { return this.value; }
    // list of Main objects
    static ArrayList<Main> list = new ArrayList<>();
    public static void sortList(int length)
        // Sorting the list using lambda function
            (a, b) -> a.getValue().compareTo(b.getValue()));
        System.out.println("Sorted List : ");
        // Printing the sorted List
        for (Main obj : list) {
    public static void main(String[] args)
        // take input
        Scanner sc = new Scanner(;
            "How many characters you want to enter : ");
        int l = sc.nextInt();
        // Taking value of list as input
        for (int i = 0; i < l; i++) {
            list.add(new Main(;


Output of the program

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