how to override compareto method in java

Deepika Sahu answered on December 24, 2022 Popularity 8/10 Helpfulness 3/10

answer how to override compareto method in java

how to override compareto method in java

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// Java Program to show how to override the compareTo()
// method of comparable interface
import java.util.*;
 
// implementing Comparable interface
public class GFG implements Comparable<GFG> {
 
    String name;
    int age;
 
    // Class constructor
    GFG(String name, int age)
    {
        this.name = name;
        this.age = age;
    }
    public int getage() { return age; }
    public String getname() { return name; }
    public static void main(String[] args)
    {
        // Creating GFG class object
        GFG ob[] = new GFG[4];
 
        // Inserting elements in the objects
        ob[0] = new GFG("Aayush", 14);
        ob[1] = new GFG("Ravi", 12);
        ob[2] = new GFG("Sachin", 19);
        ob[3] = new GFG("Mohit", 20);
 
        // sort the array,using overridden method
        Arrays.sort(ob);
 
        for (GFG o : ob) {
 
            // printing the sorted array objects name and
            // age
            System.out.println(o.name + " " + o.age);
        }
 
        // if you want to create a dynamic array ,then you
        // can create an arraylist
        ArrayList<GFG> objects = new ArrayList<>();
 
        // creating a new GFG object
        GFG newObject1 = new GFG("Rohan Devaki", 20);
 
        // inserting the new object into the arraylist
        objects.add(newObject1);
 
        // creating a new GFG object
        GFG newObject2 = new GFG("Algorithammer", 22);
 
        // inserting the new object into the arraylist
        objects.add(newObject2);
 
        // using Collections to sort the arraylist
        Collections.sort(objects);
 
        for (GFG o : objects) {
            // printing the sorted objects in arraylist by
            // name and age
            System.out.format("%s  %d\n", o.name, o.age);
        }
    }
    // Overriding compareTo() method
    @Override public int compareTo(GFG o)
    {
        if (this.age > o.age) {
 
            // if current object is greater,then return 1
            return 1;
        }
        else if (this.age < o.age) {
 
            // if current object is greater,then return -1
            return -1;
        }
        else {
 
            // if current object is equal to o,then return 0
            return 0;
        }
    }
}

Popularity 8/10 Helpfulness 3/10 Language java

Source: www.geeksforgeeks.org

Tags: compareto java

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Contributed on Dec 24 2022

Deepika Sahu

0 Answers Avg Quality 2/10

how to override compareto method in java

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