我试图从文本文件中读取一个整数和两个双精度数。我写了一个简短的示例演示我的问题。
import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
public class Test {
public static void main(String[] args) {
int q = 0;
double w = 0, e = 0;
Scanner s = null;
try {
s = new Scanner(new File(args[0]));
while(s.hasNext()) {
q = s.nextInt();
w = s.nextDouble();
e = s.nextDouble();
}
System.out.println("1: " + q + "\n2: " + w + "\n3: " + e);
} catch(FileNotFoundException e1) {
e1.printStackTrace();
System.out.println(e1.getMessage());
} finally {
if(s != null) {
s.close();
}
}
}
}
它给了我一个
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.nextDouble(Unknown Source)
at Test.main(Test.java:14)
我认为我的扫描仪在阅读双重内容时遇到了问题,但我无法弄清楚原因。
我的文字文件包含:
3000 30.3 10.4