Help needed with NoSuchElement exception when using StringTokenizer . The output: $ java Exercise6_4 < scores.txt Score = 25 Score = 35 Score = 43 Score = 17 Score = 8 Score = 13 Score = 45 Score = -1 Exception in thread "main" java.util.NoSuchElementException at java.util.Scanner.throwFor(Scanner.java:838) Parameter.

NoSuchElementException- It will thrown this Exception if no line was found.. IllegalStateException- It will thrown this Exception if the innvocation is done after Scanner is closed.. Now no matter what I do I keep getting NoSuchElement every time I ask for user input. public class NoSuchElementException extends RuntimeException Thrown by various accessor methods to indicate that the element being requested does not exist. The java.util.Scanner.nextDouble() method scans the next token of the input as a double. The nextLine() method returns the the line that was skipped.. Our journey continues through our in-depth Java Exception Handling series as, today, we dig into the depths of the NoSuchElementException. Description. A look at the code for java.util.Scanner.throwFor tells us the real story: // If we are at the end of input then NoSuchElement; // … The java.util.NoSuchElementException is a RuntimeException which can be thrown by different classes in Java like Iterator, Enumerator, Scanner or StringTokenizer. 在测试程序时，遇到了java.util.NoSuchElementException，发现原因是程序中的Scanner使用的System.in这个System类**静态变量**InputStream（这点倒是一直忽视了）导致的。. As the name suggests, a NoSuchElementException is thrown when trying to access an invalid element using a few built-in … Read CSV File in Java. java.util.NoSuchElementException is runtime unchecked exception which throws by nextElement() method of an Enumeration or nextXYZ() method of Scanner to indicate that there are no more elements in the enumeration or scanner. This stream is already open and ready to supply input data. Thrown by the nextElement method of an Enumeration to indicate that there are no more elements in the enumeration. This method returns the rest of the current line, excluding any line separator at the end. This stream is already open and ready to supply input data. January 10, 2018 Andrew Powell-Morse in Java, Java Exception Handling. Java read CSV file example program using Scanner code, parse csv file to object. 11-27-2013, 10:04 AM I’ve used Scanner for input plenty of times in the past and never had any chronic issue. Compatibility Version. Facing Issues On IT. 遇到的问题–java.util.NoSuchElementException. The NoSuchElementException is thrown by the following methods-nextElement() of Enumeration interface; next() of NamingEnumeration interface; nextElement() of StringTokenizer class Students should understand this error/exception when it occurs in a program. public class NoSuchElementException extends java.lang.RuntimeException.

how can I fix it there? Java User Input. A look at the code for java.util.Scanner.throwFor tells us the real story: // If we are at the end of input then NoSuchElement; // … We only cover a small useful subset, ones that allow us to read in numeric values from either the keyboard or file without having to convert them from strings and determine if there are more values to be read. And you can even close it when you are done. In our example, we will use the …