[英]Java Text File not able to be read
我正在嘗試讀取文本文件並創建對象數組。 我不斷收到以下錯誤...
Exception in thread "main" java.util.NoSuchElementException
at java.util.Scanner.throwFor(Unknown Source)
at java.util.Scanner.next(Unknown Source)
at Prog6.main(Prog6.java:33)
它沒有閱讀領域,我已經盡力解決了所有問題。 這是代碼。 任何意見,將不勝感激。 謝謝!
import java.io.*;
import java.util.*;
public class Prog6
{
public static void main(String[] args)
{
String fname;
String lname;
String team;
String position;
int completions;
int attempts;
int yards;
int receptions;
Scanner inFile = null;
Report rep = new Report();
/*
* Open File
*/
try
{
inFile = new Scanner( new File( "nfl.txt" ) );
}
catch ( FileNotFoundException e )
{
System.err.println( "Error: file not found" );
}
/*
* Read file
*/
while (inFile.hasNext())
{
fname = inFile.next();
lname = inFile.next();
team = inFile.next();
position = inFile.next();
if (position == "QB")
{
completions = inFile.nextInt();
attempts = inFile.nextInt();
yards = inFile.nextInt();
Player qb = new Player ();
rep.addQuarterback(qb);
}
else if (position == "WR")
{
receptions = inFile.nextInt();
yards = inFile.nextInt();
Player wr = new Player ();
rep.addReceiver(wr);
}
// Print report
rep.printReport();
}
}
}
由於某種原因,正在讀取的行沒有您認為的那么多。 掃描儀具有一組hasNext方法(例如,針對長值的hasNextLong()),它們告訴您是否有下一個要掃描的項目以及該項目的格式是否正確。 在獲得下一項之前,請使用這些方法,這樣可以避免錯誤。
您可能希望在“ While”循環中嘗試在“ try”循環中讀取inFile。
如果我沒看錯,文件將在此之后關閉,因此您無法真正調用掃描器。
所以,你會去:
try {
inFile = new Scanner(new File("nfl.txt"));
while(inFile.hasNext()) {
.....
.....
} catch
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