java - Issue while comparing a long string with a string of array -

main idea: have url (string) , have array few data's (string). want check whether strings inside of array found in url or not using contains() method.

my code structure: first of string words stored inside text file. read file , store values inside jtextarea. , jtextarea use gettext() method , storing values inside array. , now, check strings using contains method. here code:

this function (working fine) reads text file , write inside jtextarea.

jtextarea jta = new jtextarea(300,300); reader reader = null; try {     reader = new filereader(new file("res/pass.txt"));     jta.read(reader, "the force strong one"); } catch (exception exp) {     exp.printstacktrace(); } {     try {         reader.close();     } catch (exception exp) {} } 

wait before that, these words stored inside pass.txt earlier. example:

red~
green~
yellow~
black~

this function (working fine) know length of array.

string getarr=""; int getcount=0, z=0, lens = jta.gettext().length(); for(int i=0; i<lens; i++){     if(jta.gettext().charat(i)=='~'){         getcount++;     } } 

this function (working fine) store strings inside array.

string[] arr = new string[getcount]; for(int i=0; i<lens; i++){     if(jta.gettext().charat(i)!='~'){         getarr = getarr+jta.gettext().charat(i);     }     else{         arr[z] = getarr; getarr=""; z++;     } } 

the problem starts here. tried print array values in console , it's displaying values. but, when comparison it's not working expected.

string txtgeturl = txturl.gettext(); //the url boolean ok=true;  for(int i=0; i<arr.length; i++){     system.out.print(arr[i]); } for(int i=0; i<arr.length; i++){     if(txtgeturl.tolowercase().contains(arr[i].tolowercase())){        ok=false;     } }  if(ok==false){     joptionpane.showmessagedialog(null, "url blocked!");  } else{    joptionpane.showmessagedialog(null, "whitelist url");  } 

let say, sample url enter in textfield http://www.example.com/ex/examplered.html instead of displaying url blocked it's displaying whitelist url. please me solve problem. in advance.

when dealing string objects, there no need hand build own parsing based on characters , indexes, there many methods available help.

here, you'll want use split() , trim().

initially values red~ , put text area, add white space it. value deal be: red ~ \n or variant.

so, first use split() on ~ character , use trim() on first element of resulting split array.

here i've written quick test class show in action:

public class blockedwords {      public static void main(final string[] args) {         //various different types of white space within input.         final string[] input = {" ~\n\r","\n\rb ~","\ne\r~"," g\n~"};          final string[] urls = {"www.url.com/a","www.url.com/b","www.url.com/c","www.url.com/d",                 "www.url.com/e","www.url.com/f","www.url.com/g","www.url.com/h"};          final blockedwords whitelisting = new blockedwords(input);          (final string url : urls) {             if( whitelisting.containsblockedword(url) ) {                 system.out.println(url + " blocked.");                 continue;             }             system.out.println(url + " whitelisted.");         }     }       private string[] blockedwords;      public blockedwords(final string[] blockedwords) {         (int = 0; < blockedwords.length; i++) {             //split on ~ character array of {"word", ""} take word. in index 0.             //then trim in case there whitespace characters still around word.             blockedwords[i] = blockedwords[i].split("~")[0].trim();         }          this.blockedwords = blockedwords;     }      public boolean containsblockedword(final string url) {         (final string blockedword : this.blockedwords) {             if( url.tolowercase().contains( blockedword.tolowercase() ) ) {                 return true;             }         }         return false;     } } 

and output this:

www.url.com/a blocked.

www.url.com/b blocked.

www.url.com/c whitelisted.

www.url.com/d whitelisted.

www.url.com/e blocked.

www.url.com/f whitelisted.

www.url.com/g blocked.

www.url.com/h whitelisted.