Best way to check array elements contain specific value

Question

I have a list of objects and have to search through this list if it contains a specific value. The specific values are all saved in an array. What should I set for allValuesFromArray in the code below so that it would function accordingly?

List<ownClass> objectList;
String[] specificValueArray = {"value0","value1","value2","value3"};
for (ownClass object:objectlist){
    if (object.getSomeValue() == allValuesFromArray){
            //some code
        }
    }

If your list is sorted, then you can use Collections.binarySearch — Pragnani Kinnera
– Pragnani Kinnera, Commented Mar 16, 2016 at 15:32

Idos · Accepted Answer · 2016-03-16 15:26:00Z

2

IIUC, you can use:

if (Arrays.asList(specificValueArray).contains(object.getSomeValue())){
    ...
}

This will return true if object.getSomeValue() is inside specificValueArray (remember to
import java.util.Arrays;)

answered Mar 16, 2016 at 15:26

Idos

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Comments

Darth Android · Accepted Answer · 2016-03-16 15:27:56Z

0

Have you tried:

if (!objectList.retainAll(Arrays.asList(specificValueArray)).isEmpty()) {
    //some code
}

This disguises the complexity a bit, in that this is O(n^2), but is clean and readable.

answered Mar 16, 2016 at 15:27

Darth Android

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