CODEWITHSUNDEEP
java
user2995057
user2995057

Reputation: 13

reading String with spaces java

I am trying to read from scanner with spaces, i want to read even the spaces. for example "john smith" to be read "john smith".

my code is as follow: when it gets to the space after john it just hangs and doesn't read any more. any help would be appreciated.

Scanner in = new Scanner(new InputStreamReader(sock.getInputStream()));

String userName = "";
while (in.hasNext()) {
    userName.concat(in.next());
}

Upvotes: 0

Views: 441

Answers (3)

Mifmif
Mifmif

Reputation: 3190

When we use Scanner.next() to read token there is what we call a delimiter, the default delimiter used in by Scanner is \p{javaWhitespace}+ , you can get it by calling Scanner.delimiter(), which is any char that validate the Character.isWhitespace(char). you can use a customized delimiter for your Scanner using Scanner.useDelimiter().

If you want to take one line as a string so you can use nextLine() , if you already know what is the type of the next token in the input stream, scanner gives you a list of method next*() take convert the token to the specified type. see Scanner's doc here for more info.

Upvotes: 0

Sergey Kalinichenko
Sergey Kalinichenko

Reputation: 726509

Scanner.next() returns the next token, delimited by whitespace. If you would like to read the entire line, along with the spaces, use nextLine() instead:

String userName = in.nextLine();

Upvotes: 1

gstackoverflow
gstackoverflow

Reputation: 37034

Scanner scan = new Scanner(file);  
scan.useDelimiter("\\Z");  
String content = scan.next();

or

 private String readFileAsString(String filePath) throws IOException {
            StringBuffer fileData = new StringBuffer();
            BufferedReader reader = new BufferedReader(
                    new FileReader(filePath));
            char[] buf = new char[1024];
            int numRead=0;
            while((numRead=reader.read(buf)) != -1){
                String readData = String.valueOf(buf, 0, numRead);
                fileData.append(readData);
            }
            reader.close();
            return fileData.toString();
        }

Upvotes: 0

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