java - Use boolean to search duplicate -

i want use boolean search duplicate when need print out list of names. need write program read names in text file , print out console. compiler doesn't work in case. don't know why? can guys me?

import java.io.*; import java.util.*;  public class namesorter  {    public static void main(string[] args) throws exception   {     bufferedreader cin, fin;     cin = new bufferedreader(new inputstreamreader(system.in));       //description     system.out.println("programmer: minh nguyen");     system.out.println("description: program sort names stored in file.");     system.out.println();     //get input     string filename;     system.out.print("enter file's name: ");     filename = cin.readline();     fin = new bufferedreader(new filereader(filename));     int nnames = 0;     string[] name = new string[8];      //initialize array elements     for(int i=0; i<name.length;i++)     {         name[i]=" ";     }     // read text file     while(fin.ready())     {       string aname = fin.readline();       string temp =  aname;       boolean check;       if(temp.compareto(" ")>0)       {            for(int i=0; i<name.length;i++)           {               if(temp.comparetoignorecase(name[i])==0)               {                   check = true;                   break;               }             }        }                          if(nnames<name.length&& check = false)           {               name[nnames++] = temp;           }        }       }     fin.close();      // sort names aphabetically.     for(int i=0;i<nnames; i++)     {       int j;       for(j=i+1;j<nnames; j++)       {                  if(name[i].comparetoignorecase(name[j])>0)           {           string temp = name[i];           name[i] = name[j];           name[j] = temp;                       }         }     }      for(int i=0; i<name.length;i++)         system.out.println(name[i]);    }  } 

your code :

if(nnames<name.length && check = false) 

check= false , assigns false check. compare check false can use check==falseor !check.

depending on trying validate. below code remove compilation error:

check == false //checks if check false 

or,

if(nnames<name.length && (check = false)) // above same if(nnames<name.length && false) // false