我一直在试图阻止例外,但我不知道怎么办。我尝试过parseInt,java.util.NormalExceptionMismatch等等。
parseInt
java.util.NormalExceptionMismatch
有谁知道如何解决此问题?由于复制和粘贴,格式化有些偏离。
do { System.out.print( "How many integers shall we compare? (Enter a positive integer):"); select = intFind.nextInt(); if (!intFind.hasNextInt()) intFind.next(); { // Display the following text in the event of an invalid input System.out.println("Invalid input!"); } }while(select < 0)
我尝试过的其他方法:
do { System.out.print( "How many integers shall we compare? (Enter a positive integer):"); select = intFind.nextInt(); { try{ select = intFind.nextInt(); }catch (java.util.InputMismatchException e) { // Display the following text in the event of an invalid input System.out.println("Invalid input!"); return; } } }while(select < 0)
在我看来,您想跳过所有内容,直到获得整数。此代码在这里跳过除整数以外的所有输入。
只要没有可用的整数(而(!in.hasNextInt())),则丢弃可用的输入(in.next)。当整数可用时-读取它(int num = in.nextInt();)
public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); while (!in.hasNextInt()) { in.next(); } int num = in.nextInt(); System.out.println("Thank you for choosing " + num + " today."); } }