CODEWITHSUNDEEP
javaregexdelimiter
0x56794E
0x56794E

Reputation: 21281

Scanner's delimiter and regex in java

I'm trying to read input word by word, but couldn't figure out how to set Scanner's delimiter to whitespace and punctuation marks except ' (the single quote). Here's what I got

BufferedReader input;
String line;
Scanner sc;
String word;
try  {
    input = new BufferedReader(new FileReader(path));
    while (input.ready()) {
        line = input.readLine();
        System.out.println("Current Line: " + line);
        sc  = new Scanner(line);
        sc.useDelimiter("\\W\\s^\'");
        //...
    }
}
//...

Upvotes: 2

Views: 2486

Answers (2)

MäxL
MäxL

Reputation: 195

You can also use the Tokenizer like that:

StringTokenizer st1 = new StringTokenizer("a|b|c");

while(st1.hasMoreTokens())
  System.out.println(st1.nextToken());

Hope that could help you in your case.

Upvotes: 1

Peter Lawrey
Peter Lawrey

Reputation: 533502

I assume you mean?

sc.useDelimiter("\\W\\s^\'");

I would use

sc.useDelimiter("[^\\w']+");

String line= "Hello, world!\n 'Computer\n \n Science'\n Hell\n";
System.out.println(Arrays.toString(line.split("[^\\w']+")));

prints

[Hello, world, 'Computer, Science', Hell]

String line= "Hello, world!\n 'Computer\n \n Science'\n Hell\n";
Scanner scan = new Scanner(line);
scan.useDelimiter("[^\\w']+");
while(scan.hasNext())
    System.out.print("|"+scan.next());
System.out.println("|");

prints

|Hello|world|'Computer|Science'|Hell|

Upvotes: 2

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