本文介绍了InputMismatchException时的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想问一下为什么我会收到一个 InputMismathException
?
我已经声明了一个类型为 double
的变量,当我分配一个点值时,例如(4.6)它会抛出我:
线程main中的异常java.util.InputMismatchException
在java.util.Scanner.throwFor( Scanner.java:909)
在java.util.Scanner.next(Scanner.java:1530)
在java.util.Scanner.nextDouble(Scanner.java:2456)
在练习.ComputingMeanAndStandartDeviation_5_21.main(ComputingMeanAndStandartDeviation_5_21.java:18)
这是代码:
包练习;
import java.util。*;
public class ComputingMeanAndStandartDeviation_5_21
{
public static void main(String [] args)
{
扫描仪输入=新的扫描仪。在);
double sum = 0;
double number = 1;
double counter = 1;
System.out.println(输入十个数字:);
while(counter< 10)
{
number = input.nextDouble();
sum + = number;
counter ++;
}
System.out.println(sum ++ number ++ counter);
double mean = sum / counter;
System.out.println(的意思是:+的意思);
}
}
解决方案
区域设置中的问题
Locale.setDefault(Locale.US);
扫描仪输入=新的扫描仪(System.in); (78.12)而不是,(78.12)
$ b p>
I would like to ask why I am getting an InputMismathException
?
I have declared a variable of type double
and when I assign it a point value e.g.(4.6) it throws me:
Exception in thread "main" java.util.InputMismatchException
at java.util.Scanner.throwFor(Scanner.java:909)
at java.util.Scanner.next(Scanner.java:1530)
at java.util.Scanner.nextDouble(Scanner.java:2456)
at Exercises.ComputingMeanAndStandartDeviation_5_21.main(ComputingMeanAndStandartDeviation_5_21.java:18)
Here is the code:
package Exercises;
import java.util.*;
public class ComputingMeanAndStandartDeviation_5_21
{
public static void main(String[] args)
{
Scanner input = new Scanner(System.in);
double sum = 0;
double number = 1;
double counter = 1;
System.out.println("Enter ten numbers: ");
while(counter<10)
{
number = input.nextDouble();
sum +=number;
counter ++;
}
System.out.println(sum + " " + number + " " + counter);
double mean = sum / counter;
System.out.println("The mean is: " + mean);
}
}
解决方案 Problem in locale
Locale.setDefault(Locale.US);
Scanner input = new Scanner(System.in);
US decimal delimiter "."(78.12) and not ","(78,12)
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