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我得到一個輸入不匹配錯誤,但我不知道爲什麼。它正在另一臺計算機上工作,但似乎沒有在我的筆記本電腦上工作。起初,我認爲這可能是我的txt文件,但這不是原因。輸入不匹配異常錯誤
import java.io.*;
import java.util.*;
public class FindGrade {
public static final int NUM_SCORE_TYPES = 5;
public static void main(String[] args) {
Scanner scan = null;
int[] quizArray = null;
int[] labArray = null;
int[] attendance = null;
int[] midterms = null;
int quizgrade =0;
int labgrade=0;
int attendance_1=0;
int midterms_1 =0;
String name;
try {
scan = new Scanner(new File("input.txt"));
} catch (FileNotFoundException e) {
e.printStackTrace();
return;
}
// each iteration is for single exam type (ie: Quizzes is the 1st one)
for (int i = 0; i < NUM_SCORE_TYPES; i++) {
name = scan.next();
int numScores = scan.nextInt();
int maxGrade = scan.nextInt();
if (name.equals("Quizzes")) {
quizArray = new int[numScores];
readScores(quizArray, numScores, scan);
}
else if (name.equals("Labs")) {
labArray = new int[numScores];
readScores(labArray, numScores, scan);
}
else if (name.equals("Lab_attendance")) {
attendance = new int[numScores];
readScores(attendance, numScores, scan);
}
else if (name.equals("Midterms")) {
midterms = new int[numScores];
readScores(midterms, numScores, scan);
}
}
}
public static void readScores(int[] scoreArray, int numScores, Scanner scan) {
for (int i = 0; i < numScores; i++) {
scoreArray[i] = scan.nextInt();
}
}
public static void average(double [] scoreArray, int numScores){
double sum=0;
for(int i=0; i< scoreArray.length; i++){
sum += scoreArray[i];
}
double average = sum/numScores;
System.out.println(sum + " " + average);
}
}
輸出:
Exception in thread "main" java.util.InputMismatchException
at java.util.Scanner.throwFor(Scanner.java:840)
at java.util.Scanner.next(Scanner.java:1461)
at java.util.Scanner.nextInt(Scanner.java:2091)
at java.util.Scanner.nextInt(Scanner.java:2050)
at FindGrade.main(FindGrade.java:33)
輸入文件:
Quizzes 8 10
5 8 9 10 4 0 10 7
Labs 6 100
95 90 100 87 63 92
Lab_attendance 16 1
1 1 1 0 1 1 1 1 0 1 1 1 1 0 1 1
Midterms 2 100
87 94
Final 0 100
好像你的'Scanner'正在從文本文件中讀取的內容不是int或者太大而不能存儲到int中。你可以在這裏放置一個示例輸入文件嗎? –
你是否參考這個問題你的問題http://stackoverflow.com/questions/14027537/input-mismatch-exception?rq=1 –
我懷疑這個「name = scan.next();」和「if(name。等於(「測驗」))「讓我檢查 –