How to convert Integer ArrayList in Java to int array in single line [duplicate]

Question

I want to convert the following ArrayList of Integer type to array of type int in java

ArrayList<Integer> arrlist = new ArrayList<Integer>(5);  
arrlist.add(10);  
arrlist.add(20);  
arrlist.add(30);  
arrlist.add(40);

Output:

[10, 20, 30, 40]

int[] array = arrList.stream().mapToInt(i -> i).toArray(); — Slaw
– Slaw, Commented Sep 6, 2023 at 17:06
Consider utilizing Integer arrays when converting to and from Collection objects. — Reilas
– Reilas, Commented Sep 6, 2023 at 17:55

Beulah Evanjalin · Accepted Answer · 2023-09-06 17:11:42Z

2

int[] intArray = arrlist.stream()
                .mapToInt(Integer::intValue)
                .toArray();

answered Sep 6, 2023 at 17:11

Beulah Evanjalin

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