hashcode appearing instead of int, Object name not appearing correctly?

Question

As part of my project, I have to make a loop to repeatedly add objects to my queue

Here is the code

  for(int rabbitcounter=0; rabbitcounter<30;rabbitcounter++) {
    yettoracequeue.add(new Rabbits("Rabbit" + rabbitcounter, Math.random()*100));
    System.out.println(yettoracequeue);
    System.out.println(rabbitcounter);

I always use System.out.println to check if things are going as expected.

However when the System.out.println executes above, it gives me

[queuepart.Rabbits@7852e922]

Instead of Rabbit 1.

Using the above, I tried to call the getName() method from my Rabbits class on it with the following line

System.out.println(queuepart.Rabbits@7852e922.getName());

but it gives at error. From what I understand it is because the object has not been initialized.

Here is my Rabbits class

package queuepart;
public class Rabbits {
// properties of rabbits
private double speed;
private String name;
//private int counter = 1;
//Constructor, must be name of object
public Rabbits() {

}

public Rabbits(String name, double speed) {
    this.name = name;
    this.speed = speed;
    //counter++;
}
//Speedgetter
public double getSpeed() {
    return speed;
}

//Namegetter
public String getName() {
    return name;  
}

//Speedsetter
public void setSpeed (double speed) {
    this.speed = speed;
}

//Namesetter
public void setName(String name) {
    this.name = name;
}

}

I think I am still able to proceed to the next step of my project with the wrongly provided names but the conclusion of my project requires me to have the correct rabbit names e.g Rabbit 1, Rabbit 2 etc etc

Thank you and sorry for the long post. :)

Override the `toString` method in the `Rabbit` class, this is the method called when you do a `System.out.println(someRabbit)` . — Arnaud, Apr 05 '16 at 13:14
@Hackerdarshi It is a queue that I am adding my rabbit objects to. — AdventL, Apr 05 '16 at 13:37
@Berger Thank you for the link you've provided! Solved my problem and also has a detailed explanation as to why and how it's solved :) — AdventL, Apr 05 '16 at 13:37

score 1 · Accepted Answer · answered Apr 05 '16 at 13:14

1

You should override toString() method in your Rabbits class

@Override
public String toString() {
    return name;
}

answered Apr 05 '16 at 13:14

bedrin

4,458
32
53

score 0 · Answer 2 · answered Apr 05 '16 at 13:19

0

Override the toString() method of Object class. On you Rabbits class add

@Override
public String toString(){
   return "[Rabbit name: " + this.name + " - Rabbit speed: " + this.speed + " ]";
}

answered Apr 05 '16 at 13:19

A0__oN

8,740
6
40
61

score 0 · Answer 3 · answered Apr 05 '16 at 13:20

Change your Rabbit class so as to override the toString() methos from Object class as below:

package queuepart;
public class Rabbits {
    // properties of rabbits
    private double speed;
    private String name;
    //private int counter = 1;
    //Constructor, must be name of object
    public Rabbits() {

    }

    public Rabbits(String name, double speed) {
        this.name = name;
        this.speed = speed;
        //counter++;
    }
    //Speedgetter
    public double getSpeed() {
        return speed;
    }

    //Namegetter
    public String getName() {
        return name;  
    }

    //Speedsetter
    public void setSpeed (double speed) {
        this.speed = speed;
    }

    //Namesetter
    public void setName(String name) {
        this.name = name;
    }

    public String toString(){
        return this.name + " " + this.speed;
    } 
}

hashcode appearing instead of int, Object name not appearing correctly?

3 Answers3