java - java Scanner nextDouble() 不接受双精度
问题描述
public class ScannerNextDoubleExample4 {
public static void main(String args[]){
double value;
Scanner scan = new Scanner(System.in);
System.out.print("Enter the numeric value : ");
value = scan.nextDouble();
System.out.println("Double value : " + value +" \nTwice value : " + 2.0*value );
scan.close();
}
}
输入十进制数后,程序崩溃。("java.util.InputMismatchException") 为什么会这样?谢谢你的帮助!