Create ArrayList_x_array.java

sandeepjindal · Sep 15, 2024 · 2fce2cb · 2fce2cb
1 parent 9a1dc7d
commit 2fce2cb
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/common_syntax/java/ArrayList_x_array.java b/common_syntax/java/ArrayList_x_array.java
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+// arraylist to int[]
+arrayList.stream().mapToInt(Integer::intValue).toArray();
+
+// int[] -> arrayList       
+List<Integer> arrayList = Arrays.stream(intArray).boxed().collect(ArrayList::new, ArrayList::add, ArrayList::addAll);