[英]How can I make a do while loop with an exception catch, continuous?
I try to catch the exception which finally works but now I need to figure out how to make it loop. 我尝试捕获最终可以工作的异常,但是现在我需要弄清楚如何使其循环。 ALso, how would I be able to get user input(int select) to the outside of the loop?
另外,我如何能够将用户输入(int选择)带到循环的外部? I can try creating a new function, that might do the trick.
我可以尝试创建一个新功能,这可能会解决问题。
do {
System.out.print("How many integers shall we compare? (Enter a positive integer): ");
try {
select = intFind.nextInt();
} catch (InputMismatchException e) {
// Display the following text in the event of an invalid input
System.out.println("Invalid input!");
intFind.nextLine();
}
} while (select < 0);
Then 然后
do
{
System.out.print("How many integers shall we compare? (Enter a positive integer): ");
try {
b = Get();
}
catch (InputMismatchException e) {
// Display the following text in the event of an invalid input
System.out.println("Invalid input!");
intFind.nextLine();
} copySel = b;
}while(select < 0);
and 和
static int Get()
{
Scanner intFind = new Scanner(System.in);
int select;
select = intFind.nextInt();
return select;
}
To make it loop make sure that select
is initialized to a value less than 0. But it would be better to have a condition select < 2
, because it makes more sense to compare at least to values. 要使其循环,请确保将
select
初始化为小于0的值。但是最好使条件select < 2
更好,因为至少将其与值进行比较更有意义。
Create a method like 创建类似的方法
private int[] promptIntegers(int numberOfIntegers, Scanner sc) {
int[] integers = new int[numberOfIntegers];
//read ints
//return the array
}
and call it like 并称它为
select = intFind.nextInt();
int[] integers = promptIntegers(select, sc);
//do the comparison among the integers
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