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长整数扫描程序,线程中出现异常;“主要”;java.util.InputMismatchException_Java_Java.util.scanner_Long Integer_Credit Card_Inputmismatchexception - Fatal编程技术网

长整数扫描程序,线程中出现异常;“主要”;java.util.InputMismatchException

长整数扫描程序,线程中出现异常;“主要”;java.util.InputMismatchException,java,java.util.scanner,long-integer,credit-card,inputmismatchexception,Java,Java.util.scanner,Long Integer,Credit Card,Inputmismatchexception,我正处于完成程序的最后一步,但是,每当我输入整数(长)时,就会出现输入不匹配: Compiler message: "Exception in thread "main" java.util.InputMismatchException: For input string: "4388576018402626" at java.util.Scanner.nextInt(Scanner.java:2097) at java.util.Scanner.nextInt(Sc

我正处于完成程序的最后一步,但是,每当我输入整数(长)时,就会出现输入不匹配:

Compiler message: "Exception in thread "main" java.util.InputMismatchException: For input               string: "4388576018402626"
at java.util.Scanner.nextInt(Scanner.java:2097)
at java.util.Scanner.nextInt(Scanner.java:2050)
at CreditCardValidation.main(CreditCardValidation.java:12)"
我的代码如下:

import java.util.Scanner ; //import Scanner

public class CreditCardValidation {

public static void main (String[] args){

    Scanner kbd = new Scanner(System.in) ;

    System.out.println("Please enter Creditcard number: " ) ;

    int credNumber = kbd.nextInt() ;

    boolean n = isValid( credNumber ) ;

if (credNumber == 0 )
    System.exit(0) ;

do {                

    System.out.println("Please enter Creditcard number: " ) ;
    credNumber = kbd.nextInt() ;
    }
    while ( credNumber < 0 ) ;

if (credNumber > 0 )
    System.out.print("This credit card number is " + n ) ;




}

/*
Return true is the number is a valid card number.
*/

public static boolean isValid(long number) {


    long p = getPrefix(number, 1);
    long p2 = getPrefix(number, 2);
    int n = getSize(number);


    if ((p == 4 || p == 5 || p == 6 || p2 == 37)&& (n < 13 || n > 16) && (((sumOfDoubleEvenPlace(number) + sumOfoddPlace(number))) % 10) == 0)
        return true ;
    else
        return false ;

}


/* The sum of every other digit, doubled, starting with the first digit. */

public static int sumOfDoubleEvenPlace(long number) {
    int sum = 0;
    int maxDigitLenth = 16;
    for (int i = 1; i <= maxDigitLenth; i++)
    {
        if (i % 2 == 0)
        {
            sum = sum + getDigit((int)(number % 10) * 2);
        }
        number /= 10;
    }
    return sum;
}

/*
Return the number if it is 0-9, otherwise return the sum of
the digits of the number.
*/

public static int getDigit(int number) {
    if (number < 10) {

        return number;
    }
    else {

        return (number / 10) + (number % 10);
    }

    }
/*
Return the sum of the odd-place digits.
*/

public static int sumOfoddPlace(long number) {
    int maxDigitLength = 16;
    int sum = 0;
    for (int i = 1; i <= maxDigitLength; i++)
    {

        if (i % 2 == 1)
        {
            sum = sum + (int)(number % 10);
        }
       number /= 10;
    }
    return sum;
}

/*
Return the number of digits in d
*/

public static int getSize(long d) {

    int size = 0 ;

    while( d > 0 ) {
        d = d / 10 ;
        size = size + 1 ;       
    }
    return size ;
}

/*
Return the first k number of digits from number. If the number of digits in number is 
less than k, return the number.
*/

public static long getPrefix(long n, int k) {

    int f = getSize(n)-k;

    long prefix = n/((long)(Math.pow(10, f)));

    return prefix;
    }

/*
Return true if the digit d is a prefix for number.
*/

public static boolean prefixMatched( long number, int d ) {

    if ( d == getPrefix(number, 4))

        return true ;
    else
        return false ;

    }

}
import java.util.Scanner//导入扫描仪
公共类信用卡验证{
公共静态void main(字符串[]args){
扫描仪kbd=新扫描仪(System.in);
System.out.println(“请输入信用卡号:”);
int credNumber=kbd.nextInt();
布尔n=isValid(credNumber);
如果(credNumber==0)
系统出口(0);
做{
System.out.println(“请输入信用卡号:”);
credNumber=kbd.nextInt();
}
而(credNumber<0);
如果(credNumber>0)
系统输出打印(“此信用卡号为”+n);
}
/*
如果号码是有效的卡号,则返回true。
*/
公共静态布尔值isValid(长数字){
长p=getPrefix(数字,1);
长p2=getPrefix(数字,2);
int n=getSize(数字);
如果((p==4 | | p==5 | | p==6 | | p2==37)和&(n<13 | | n>16)和&((sumOfDoubleEvenPlace(数字)+sumOfoddPlace(数字))%10)==0)
返回true;
其他的
返回false;
}
/*从第一个数字开始,每隔一个数字的总和加倍*/
公共静态内景双倍空间(长数字){
整数和=0;
int-maxDigittenth=16;

对于(int i=1;i最大整数值为2147483647。请使用long:

long credNumber = kbd.nextLong();
或者最好使用字符串作为信用卡号:

String credNumber = kbd.nextLine();

最大整数值为2147483647。请改用长:

long credNumber = kbd.nextLong();
或者最好使用字符串作为信用卡号:

String credNumber = kbd.nextLine();

最大整数值为2147483647。请改用长:

long credNumber = kbd.nextLong();
或者最好使用字符串作为信用卡号:

String credNumber = kbd.nextLine();

最大整数值为2147483647。请改用长:

long credNumber = kbd.nextLong();
或者最好使用字符串作为信用卡号:

String credNumber = kbd.nextLine();
你应使用:

long credNumber = kbd.nextLong();
boolean n = isValid(credNumber);
因为您输入的值(16位)超过了int的限制

您的验证方法接受的时间很长,因此,您的代码应该可以很好地处理上述更改

public static boolean isValid(long number)
你应使用:

long credNumber = kbd.nextLong();
boolean n = isValid(credNumber);
因为您输入的值(16位)超过了int的限制

您的验证方法接受的时间很长,因此,您的代码应该可以很好地处理上述更改

public static boolean isValid(long number)
你应使用:

long credNumber = kbd.nextLong();
boolean n = isValid(credNumber);
因为您输入的值(16位)超过了int的限制

您的验证方法接受的时间很长,因此,您的代码应该可以很好地处理上述更改

public static boolean isValid(long number)
你应使用:

long credNumber = kbd.nextLong();
boolean n = isValid(credNumber);
因为您输入的值(16位)超过了int的限制

您的验证方法接受的时间很长,因此,您的代码应该可以很好地处理上述更改

public static boolean isValid(long number)

这是因为您输入的值超出了整数值的范围。在这种情况下,您需要使用long。integer的最大值为2147483647


这是因为您输入的值超出了整数值的范围。在这种情况下,您需要使用long。integer的最大值为2147483647


这是因为您输入的值超出了整数值的范围。在这种情况下,您需要使用long。integer的最大值为2147483647


这是因为您输入的值超出了整数值的范围。在这种情况下,您需要使用long。integer的最大值为2147483647


您还可以将int转换为biginger,然后在biginger对象上调用add函数

您还可以将int转换为biginger,然后在biginger对象上调用add函数

您还可以将int转换为biginger,然后在biginger对象上调用add函数

您还可以将int转换为BigInteger,然后对biginger对象调用add函数(因为它太长了),因为它太长了(因为它太长了),因为它太长了(因为它太长了)