Read integers separated with whitespace into int[] array

Question

I read line with

BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
reader.readLine();

Example input is

Answer 1

Since you don't know the size of input, you can read input as string and then parse the string array to integer array

String[] arr=reader.readLine().split(" ");
int[] intarr=new int[arr.length];

for(int i=0;i