How to dynamically set an array names during the Run time in Java?

Question

Consider we are evaluating some value and based on that we are assigning the name of the array i.e

if (Value == 1) {
        set array_name "One"
    } else {
        set array_name "Some_Number"
    }
    type[] array_name;//Set the Array name here
}

Can we create dynamic names of array in java ?

You can't. But you can wrap your array and string value ('name') — voismager, Dec 14 '18 at 06:16
I am looking to allocated variable names of Array during the run time — Gani, Dec 17 '18 at 05:59

score 1 · Answer 1 · answered Dec 14 '18 at 06:55

Possible alternative can be;

//populate array with whatever name
int[] arrayA = new  int[3];
    for(int i=0;i<arrayA.length;i++) {
        arrayA[i]=i*10;
    }
//copy the previously populated array to the desired name array
if (Value == 1) {
    int[] one = arrayA;
} else {
    int[] some_number = arrayA
}

score 1 · Accepted Answer · answered Dec 14 '18 at 11:55

1

As you haven't mentioned the use case, but if you want to assign array a name based on a condition and later want to access the array with the same name, you can use a HashMap.

HashMap<String,String[]> arrayMap = new HashMap<>();
if (Value == 1) {
    arrayMap.put("One",youArray);
} else {
        arrayMap.put("some_number",youArray);
}
String[] myArray = arrayMap.get("One");

Hope this helps.

answered Dec 14 '18 at 11:55

Jatin Asija

128
4
13

I hope there is no other way than hash Map – Gani Dec 19 '18 at 05:59

score 0 · Answer 3 · answered Dec 14 '18 at 06:15

0

This is not possible in Java. Variable names cannot be set or changed dynamically.

answered Dec 14 '18 at 06:15

Henry

42,982
7
68
84

How to dynamically set an array names during the Run time in Java?

3 Answers3