Java ArrayList<Integer>转为int[]数组

welcome to my blog一句话: al.stream().mapToInt(k -> k).toArray();如下所示ArrayList<Integer> al = new ArrayList<>();al.add(1);al.add(3);al.add(5);int[] arr = al.stream().mapToInt(k->k...

littlehaes

4904人浏览 · 2020-02-10 15:07:56

littlehaes · 2020-02-10 15:07:56 发布

welcome to my blog

一句话: `al.stream().mapToInt(k -> k).toArray();`如下所示

ArrayList<Integer> al = new ArrayList<>();
al.add(1);
al.add(3);
al.add(5);

int[] arr = al.stream().mapToInt(k->k).toArray();
for(int a:arr)
    System.out.print(a+" ");