質問編集履歴
1
IOExeptionを入れた後のコードとエラーです。
test
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test
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例外java.io.FileNotFoundExceptionは報告されません。スローするには、捕捉または宣言する必要があります
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>>fileInputのシンボルが見つけられません
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------------------------------------
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import java.util.Scanner;
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import java.io.*;
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public class Lab4_3 {
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public static void main (String[] args){
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//declair the valiables
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int numberInput;
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int integerInput;
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int digitSum = 0;
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int counter = 0;
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String fileName = "";
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//get an input
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Scanner input = new Scanner(System.in);
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System.out.println("How many numbers in input");
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numberInput = input.nextInt();
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//see if the input is positive or negative
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while(numberInput - 1 >= counter){
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try{
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File openFile = new File(fileName);
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// it checks if the file exists
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if (openFile.exists()) {
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// it will then crate a scanner object for the file
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Scanner fileInput = new Scanner(openFile);
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}
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}
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catch (IOException e) {
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System.out.println("IOExceptionが発生");
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}
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// it then will check if there is no integers in the file
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if (!fileInput.hasNextInt()) {
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// it will give an error if there is no error
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System.out.println("The file doesn't contain any integers. Exit program!");
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}
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else {
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// it will then loop through the integers until there is no more integers
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// anymore
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while (fileInput.hasNextInt()) {
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// it will get the next integer from the file
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int lineInput = fileInput.nextInt();
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if (lineInput <= 0){
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System.out.println("It is a negative integer.");
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}
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//if positive, stat a loop and get the sum of the gidits
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else{
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while (lineInput != 0){
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}
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digitSum += lineInput % 10;
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lineInput = lineInput / 10;
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}
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System.out.println("The sum of the digits is " + digitSum);
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}
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counter++;
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}
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}
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}
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}
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```
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163
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@@ -168,6 +320,10 @@
|
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168
320
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169
321
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IOExceptionを入れようとしましたが、書き方だ正しくないのか、さらにエラーが出てしましました。
|
|
170
322
|
|
|
323
|
+
>>追記としてIOExeptionを入れたものです。
|
|
324
|
+
|
|
325
|
+
fileInputのシンボルが見つけられません というエラーが出ています。
|
|
326
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+
|
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171
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172
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173
329
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### 補足情報（FW/ツールのバージョンなど）
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