Searching through a text File with user input

Question

I am having an issue. I want to search a text file for multiple matching keywords from a String [] . I want to output only the sentence that contains one or more of these matching keywords.

So String[] keywords = { "going", "What book", "not going ","office", "okay"};

If a file called data.txt contains the sentence " I am going to the office at 6".And the user enters "going and office" I want to print this sentence to console. But as of right now I can only search the file for only one matching keyword. Can someone guide me in the direction to finding multiple keywords in a file.

So here is my method to search the text

public static void parseFile(String s) throws FileNotFoundException {
    File file = new File("data.txt");

    Scanner scanner = new Scanner(file);
    while (scanner.hasNextLine()) {
        final String lineFromFile = scanner.nextLine();
        if (lineFromFile.contains(s)) {
            // a match!
            System.out.println(lineFromFile);
            // break;
        }

    }
}

and here is my main method

public static void main(String args[]) throws ParseException,
    FileNotFoundException {


String[] keywords = { "going", "What book", "not going ","office", "okay"};


boolean endloop = false;

boolean found = false;

Scanner scanner = new Scanner(System.in);
String input = null;

System.out.println("What's up?");
do {
    System.out.print(" - ");
    input = scanner.nextLine().toLowerCase();
    for (String keyword: keywords) {
        if (input.contains(keyword)) {

            parseFile(keyword);
        }
    }
    if (!found) {
        System.out
                .println("I am sorry I do not know");
    }

    break;
}

while (!input.equalsIgnoreCase("thanks"));
System.out.println(" Have a good day!");

  }
    }

Answer 1

Just use a loop. Either this way, if one match is sufficient:

String line = ...;
String[] search = new String[]{...};

boolean match = false;

for(int i = 0 ; i < search.length && !match; i++)
    match = line.contains(search[i]);

or, if all strings must be part of line:

String line = ...
String[] search = new String[]{...};

boolean match = true;

for(int i = 0 ; i < search.length && match ; i++)
    match = line.contains(search[i]);