• 输入1,2,3，转成内部需要的数组[1,2,3]

Scanner sc =new Scanner(System.in);
String str =sc.next();
String[] split = str.split(",");
int[] strInt = new int[split.length];
for (int i=0;i<split.length;i++){
    strInt[i]=Integer.parseInt(split[i]);
}