remove object from an array java

Question

My practice problem says to"this method returns an array that has the elements of the specified

 // array of Objects, with the Object at the specified index removed.

    // the returned array should be smaller by one and have all elements

    // in the same relative location to each other. YOU MAY NOT USE

    // A LIST :)

Object[] remove(int index, Object[] arr){"

I have come up with this so far, and I'm not entirely sure it works. Can you guys please take a look and give me some feedback on how to fix it so I can do this "remove" properly.

public static remove(int index, Object[] arr){
int counter = 0;
int temp = 2;
int[] arr = {1, 2, 3, 4};
int[] second = new int[arr.length-1];

    for(int i=0; i< arr.length;i++){
        if(i != temp){
            second[counter] = arr[i];
            counter ++;

        }
        //return second;
    }

remove needs a return type. Also, you never use the index parameter. Other than that, you're really close. — ajb
– ajb, Commented Feb 9, 2016 at 7:11
public static remove(int index, Object[] arr){ int counter = 0; int index = 2; int[] arr = {1, 2, 3, 4}; int[] second = new int[arr.length-1]; for(int i=0; i< arr.length;i++){ if(i != index){ second[counter] = arr[i]; counter ++; } //return second; } — chicagobears9023
– chicagobears9023, Commented Feb 9, 2016 at 7:15
index is the index of the element you want to remove. Looking at your code, you already know how to skip the index that you want to removed. You just called it the wrong thing. — ajb
– ajb, Commented Feb 9, 2016 at 7:16

Davit Mumladze · Accepted Answer · 2016-02-09 07:40:08Z

2

public static Object[] remove(int index, Object[] array) {
    Object[] newArray = new Object[array.length - 1];
    for (int i = 0; i < array.length; i++) {
        if (index > i) {
            newArray[i] = array[i];
        } else if(index < i) {
            newArray[i - 1] = array[i];
        }
    }
    return newArray;
}

edited Feb 9, 2016 at 7:40

answered Feb 9, 2016 at 7:26

Davit Mumladze

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3 Comments

Davit Mumladze Over a year ago

I made newArray according to the problem. Now you can return that array or do whatever you want with it.

chicagobears9023 Over a year ago

I just updated my question with a second part, can you guys help me with that too? please

gkiko Over a year ago

@chicagobears9023 you should consider selecting the best answer to your original question

Moshe Stauber · Accepted Answer · 2016-02-09 07:15:34Z

0

You would have to copy over all elements, besides for the one at index, into a new array and return that.

answered Feb 9, 2016 at 7:15

Moshe Stauber

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