Reading characters from a file java

In general, each read request made of a Reader causes a corresponding read request to be made of the underlying character or byte stream. The constructors of this class assume that the default character encoding and the default byte-buffer size are appropriate. Constructors defined in this class are as follows:. A Scanner breaks its input into tokens using a delimiter pattern, which by default matches whitespace.

The resulting tokens may then be converted into values of different types using the various next methods. File; import java. Skip to content. Change Language. Related Articles. Table of Contents.

Improve Article. Save Article. Like Article. Viewed 40k times. Improve this question. Chris Marker Chris Marker 1 1 gold badge 4 4 silver badges 9 9 bronze badges. Actually, I don't understand; how you handle input isn't the same as how you read it in. IMO you should use a buffered reader and process the input character by character, not explicitly read it in that way.

Add a comment. Active Oldest Votes. Improve this answer. Did you look at the link? It shows how to read a text file character by character. Updated the answer in case the link is broken. Ahmed Ahmed 6, 10 10 gold badges 54 54 silver badges 94 94 bronze badges.

It is an answer, do you think it should contain a code to be an answer! Sign up or log in Sign up using Google. Sign up using Facebook. Return value: This method returns the string that is read by this method and excludes any termination symbol available. If the buffered stream has ended and there is no line to be read then this method returns NULL.

BufferedReader; import java. FileReader; import java. After reading all bytes, we pass those bytes to the string class constructor to create a string. Syntax: public static byte[] ReadAllBytes string path ; Parameter: Path which is the specified file to open for reading. Approach: Declaring an empty string get method of Path class helps in fetching the file by passing as an argument to it. Now readAllBytes method of the File class is used to read the above file by passing into it. Lastly, print the string.

Exceptions: ArgumentException: The path is a zero-length string, contains only white space, or one or more invalid characters as defined by InvalidPathChars. ArgumentNullException: The path is null. PathTooLongException: The specified path , file name, or both exceed the system-defined maximum length. DirectoryNotFoundException: The specified path is invalid.

UnauthorizedAccessException: This operation is not supported on the current platform. OR the path specified a directory. OR the caller does not have the required permission. FileNotFoundException: The file specified in the path was not found. NotSupportedException: The path is in an invalid format. SecurityException: The caller does not have the required permission.