java - How can I search a sentence in a file? -

i trying search program.
don't know how search sentence in file.

in c# can use linq, in java don't know.

java loves difficult in both line-based , token-based scanning.

heres example of line based scanning sentence:

public static boolean scanfile(string sentence) {     scanner linescan = new scanner(new file("filename.txt"));     while (linescan.hasnextline()) {         if (linescan.nextline().contains(sentence)) {             return true;         }     }      return false; } 

and heres example of token based scanning word:

public static boolean scanfile(string word) {     scanner linescan = new scanner(new file("filename.txt"));     while (linescan.hasnextline()) {         scanner tokenscan = new scanner(s.nextline());         while (tokenscan.hasnext()) {             if (tokenscan.next().equals(word)) {                 return true;             }         }     }      return false; }