Creating arrays in java and initialising in constructor

Question

I need to create an array of objects (Cars) and then initialise the array to be of a required size (10) within a constructor. So far I have this:

public class Queue {

    private Car [] car;

    public Queue (Car [] car) {
        Car [] car = new Car[10];
    }   
}

Which when I compile says it cannot find the Car symbol. I'm presuming the problem is with the creation of the array as I don't seem to have created the Car properly. Any help would be appreciated <3

You're declaring a car variable three times: once as a field, once as a parameter to the constructor, and once as a local variable in the constructor. None of them are actually used. — Mark Peters
– Mark Peters, Commented Mar 31, 2013 at 13:34

rabz100 · Accepted Answer · 2013-03-31 13:44:48Z

2

This is the proper way to create it.

public class Queue {
    private Car [] car;
    public Queue () {
       car = new Car [10];
    }   
}

Provided that you have defined the car class.

edited Mar 31, 2013 at 13:44

answered Mar 31, 2013 at 13:32

rabz100

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1 Comment

kaysush Over a year ago

OP also wants to initialize the array.

Lokesh · Accepted Answer · 2013-03-31 13:59:47Z

0

Create a Car Class and put it in classpath and it will work smoothly .

EDIT[2nd time]: editing my code as per commments below. This shld work

public class Queue {

    private Car [] mycar;

    public Queue (Car [] car) {
        mycar = car;
    }   
}

EDIT:

class Car {

}

edited Mar 31, 2013 at 13:59

answered Mar 31, 2013 at 13:32

Lokesh

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4 Comments

Mark Peters Over a year ago

Well, except for the fact that the OP's code is wrong and doesn't compile even with the Car class defined.

Mark Peters Over a year ago

I have not downvoted, but have you read my comment? Your (well, the OP's) constructor for Queue is completely broken.

kaysush Over a year ago

@Lokesh car variable in the constructor is redefined that's an error.

kaysush Over a year ago

@Lokesh still wrong the local variable has shadowed the instance variable. You should use this operator.

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