java - 如何从InputStreamReader读取整数

Question

我是初学者...请耐心等待:)

这段代码据称读取数组中的 10 个整数。 InputStreamReader 读取 char(java Docs 所说的)如何将 char 转换为 int 保存在数组中？

int[] array = new int[10];
System.out.println("Please enter 10 integers. ");
for(int x=1; x <11; x++){
    InputStreamReader keyboard = new InputStreamReader(System.in);
    // Change char into int   
    array[x] = keyboard;
}

谢谢

Answer 1

试试这个 -

Scanner sc = new Scanner(System.in);
int[] array = new int[10];
for(int x=0; x <10; x++){
    array[x] = sc.nextInt();
}

Scanner#nextInt 将输入的下一个标记扫描为 int。并抛出

InputMismatchException - if the next token does not match the Integer regular expression, or is out of range
NoSuchElementException - if input is exhausted
IllegalStateException - if this scanner is closed