[SOLVED] How to efficiently remove all null elements from a ArrayList or String Array?

Issue

I try with a loop like that

// ArrayList tourists

for (Tourist t : tourists) {
    if (t != null) {     
        t.setId(idForm); 
    }   
}

But it isn’t nice. Can anyone suggest me a better solution?


Some useful benchmarks to make better decision:

While loop, For loop and Iterator Performance Test

Solution

Try:

tourists.removeAll(Collections.singleton(null));

Read the Java API. The code will throw java.lang.UnsupportedOperationException for immutable lists (such as created with Arrays.asList); see this answer for more details.

Answered By – Lithium

Answer Checked By – Gilberto Lyons (BugsFixing Admin)

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