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當我嘗試使用掃描儀讀取整數時出現錯誤。我正在使用Scanner讀取它,然後將其添加到交換機。讀取整數時出錯
public class Main{
public static void main(String [] args) throws FileNotFoundException
{
int switchVar = 0;
Scanner sc = new Scanner("System.in");
while(switchVar != 5)
{
System.out.println("op");
switchVar = sc.nextInt();
switch(switchVar)
{
case 1 :
//Data
case 2 :
//Data
}
}
sc.close();
}
}
控制檯錯誤:
Exception in thread "main" java.util.InputMismatchException
at java.util.Scanner.throwFor(Unknown Source)
at java.util.Scanner.next(Unknown Source)
at java.util.Scanner.nextInt(Unknown Source)
at java.util.Scanner.nextInt(Unknown Source)
at Main.main(Main.java:18)
線18 switchVar = sc.nextInt();謝謝。
您認爲'new Scanner(「System.in」)'做了什麼,爲什麼? – 2014-11-05 16:52:13