java - Find out number of words in file that do not match any word in the String array -

i trying create program reads data file. want each time check if next word file matches specific word specific string array.

each time words don't match, want keep track of times (wrong++) , print number of times words file didn't match @ least 1 word string array.

here program:

public class main_class {      public static int num_wrong;     public static java.io.file file = new java.io.file("text.txt");     public static string[] valid_letters = new string[130];     public static boolean wrong = true;     public static string[] sample = new string[190];      public static void text_file() throws exception {         // create scanner read file          scanner input = new scanner(file);          string[] valid_letters = { "i", " have ", " got ", "a", "date", "at",                 "quarter", "to", "eight", "8", "7:45", "i’ll", "see", "you",                 "the", "gate", ",", "so", "don’t", "be", "late", "we",                 "surely", "shall", "sun", "shine", "soon", "would", "like",                 "sit", "here", "cannot", "hear", "because", "of", "wood",                 "band", "played", "its", "songs", "banned", "glamorous",                 "night", "sketched", "a", "drone", "flying", "freaked", "out",                 "when", "saw", "squirrel", "swimming", "man", "had", "cat",                 " that", "was", "eating", "bug", "after", "dog", "got", "wet",                 "ed", "buy", "new", "pet", "my", "mom", "always", "tells",                 "me", "beautiful", "eyes", "first", "went", "school", "wanted",         "die" };          while (input.hasnext()) {             string[] sample = input.next().split("\t");              (int = 0; < valid_letters.length; i++) {                 (int j = 0; j < 1; j++) {                     if (sample[j] == valid_letters[i]) {                         boolean wrong = false;                         system.out.print("break");                         break;                     }                 }             }             if (wrong = true) {                 num_wrong++;             }         }          // print out results search         system.out         .print(" number of wrong words in first 13 sentences "                 + num_wrong);         // close file         input.close();     } } 

the text file example contains:

i want go school little monkey  

and program should return number of mistakes 2.

code:

import java.util.scanner;  public class main_class {      public static int num_wrong = 0;     public static java.io.file file = new java.io.file("text.txt");     public static string[] valid_letters = new string[130];     public static boolean wrong = true;     public static string[] sample = new string[190];      public static void main (string [] args) {         try {             text_file();         } catch (exception e) {             e.printstacktrace();         }     }      public static void text_file() throws exception {         // create scanner read file             scanner input = new scanner(file);          string [] valid_letters = { "i", " have ", " got ", "a", "date", "at",                 "quarter", "to", "eight", "8", "7:45", "i’ll", "see", "you",                 "the", "gate", ",", "so", "don’t", "be", "late", "we",                 "surely", "shall", "sun", "shine", "soon", "would", "like",                 "sit", "here", "cannot", "hear", "because", "of", "wood",                 "band", "played", "its", "songs", "banned", "glamorous",                 "night", "sketched", "a", "drone", "flying", "freaked", "out",                 "when", "saw", "squirrel", "swimming", "man", "had", "cat",                 " that", "was", "eating", "bug", "after", "dog", "got", "wet",                 "ed", "buy", "new", "pet", "my", "mom", "always", "tells",                 "me", "beautiful", "eyes", "first", "went", "school", "wanted",                 "die" };          while (input.hasnext()) {             // note: split using space, i.e. " "             string[] sample = input.next().split(" ");              // note: j < sample.length             (int j = 0; j < sample.length; j++)              {                 (int = 0; < valid_letters.length; i++)                  {                     // note: string comparison using equals                     if (sample[j].equals(valid_letters[i])) {                          // note: want update variable wrong.                         // , not create local variable 'wrong' here!                         wrong = false;                         system.out.printf("%-12s inside!%n",                                 "'" + valid_letters[i] + "'");                         break;                     }                 }                 if (wrong) {                     num_wrong++;                 }                 // reset wrong                 wrong = true;             }         }          // print out results search         system.out.println("the number of wrong words in first 13 sentences "                 + num_wrong);         // close file         input.close();     } } 

input (stored in "text.txt"):

i want go school little monkey  

output:

'i'          inside! 'to'         inside! 'to'         inside! 'school'     inside! number of wrong words in first 13 sentences 4 //'go', 'want', 'little' , 'monkey' not inside string array 

note:

• value comparison of string using equals, not == ( used reference comparision)
• boolean wrong = false; creates local variable
• your loop should using j < sample.length
• the string should split using " " (space), , not "\t" (tab)