OnJava8-Examples/strings/Groups.java at master · CSapprenticeWT/OnJava8-Examples · GitHub

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// strings/Groups.java

// We make no guarantees that this code is fit for any purpose.

// Visit http://OnJava8.com for more book information.

import java.util.regex.*;

public class Groups {

public static final String POEM =

"Twas brillig, and the slithy toves\n" +

"Did gyre and gimble in the wabe.\n" +

"All mimsy were the borogoves,\n" +

"And the mome raths outgrabe.\n\n" +

"Beware the Jabberwock, my son,\n" +

"The jaws that bite, the claws that catch.\n" +

"Beware the Jubjub bird, and shun\n" +

"The frumious Bandersnatch.";

public static void main(String[] args) {

Matcher m = Pattern.compile(

"(?m)(\\S+)\\s+((\\S+)\\s+(\\S+))$")

.matcher(POEM);

while(m.find()) {

for(int j = 0; j <= m.groupCount(); j++)

System.out.print("[" + m.group(j) + "]");

System.out.println();

}

/* Output:

[the slithy toves][the][slithy toves][slithy][toves]

[in the wabe.][in][the wabe.][the][wabe.]

[were the borogoves,][were][the

borogoves,][the][borogoves,]

[mome raths outgrabe.][mome][raths

outgrabe.][raths][outgrabe.]

[Jabberwock, my son,][Jabberwock,][my son,][my][son,]

[claws that catch.][claws][that catch.][that][catch.]

[bird, and shun][bird,][and shun][and][shun]

[The frumious Bandersnatch.][The][frumious

Bandersnatch.][frumious][Bandersnatch.]