help: matches don`t work

[asabdo]

function of code is putting if statement and discover do the if statement wrong or not?
but the answer is always wrong, plz the help to get result when put the if correct statement is not wrong.
thank you

import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Scanner;
import java.util.regex.Pattern;


public class Main {
  public static void main(String args[]) throws IOException {



    FileWriter fout = new FileWriter("test.txt");
    fout.write("if a = 30  c = a / 5 ;");
    fout.close();

    FileReader fin = new FileReader("Test.txt");

   

    Scanner src = new Scanner(fin);



       try {
           
             boolean z = Pattern.matches("if"+"[a-zA-Z]"+"="+"[0-9]"+"[a-zA-Z]"+"="+"[a-zA-Z]"+"/"+"[0-9]"+";",fin.getEncoding());
             System.out.println("pattern is: "+z);
      } catch (Exception e) {
          System.out.println("error");
      }      

   

    

    fin.close();
   

  }
}

[collin389]

Is this really so hard you need to ask someone else? Did you try printing out the two strings you are trying to match? if you had you would see that fin.getEncoding() = "Cp1252" I think that you are trying to take what is in the file and match it to "if". See if they match...

boolean z = Pattern.matches("if",src.next());

[asabdo]

Is this really so hard you need to ask someone else? Did you try printing out the two strings you are trying to match? if you had you would see that fin.getEncoding() = "Cp1252" I think that you are trying to take what is in the file and match it to "if". See if they match...

boolean z = Pattern.matches("if",src.next());

THNX on helping
i use the last those src.next(),src.toString() and src.findInLine()
but all give me false
i want to put if-statement and test on it if it is correct or no ?
and thank you

[collin389]

I don't really understand your question. Are you saying you want to check to see if a == 30, and if it is true, set c = a/5? or are just just trying to figure out if "if" is in the file.

[Syntax]

None of these quotations make any sense to me.

FileWriter fout = new FileWriter("test.txt");
FileReader fin = new FileReader("Test.txt");
boolean z = Pattern.matches("if"+"[a-zA-Z]"+"="+"[0-9]"+"[a-zA-Z]"+"="+"[a-zA-Z]"+"/"+"[0-9]"+";",fin.getEncoding());

[asabdo]

thank you
and i reach solution
this is solution

String abdo=JOptionPane.showInputDialog("Enter sentence to be Parsed");

 

       boolean b = Pattern.matches("[i][f]"+"[ \t\n\f\r]+"+"([a-zA-Z][0-9]*|| [a-zA-Z])+"+"[ \t\n\f\r]*"+"="+"[ \t\n\f\r]*"
            +"[0-9]+"+"[ \t\n\f\r]*"+"([a-zA-Z][0-9]*|| [a-zA-Z])+"+"[ \t\n\f\r]*"+"="+"[ \t\n\f\r]*"+"([a-zA-Z][0-9]*|| [a-zA-Z])+"+"[ \t\n\f\r]*"+"/"+"[ \t\n\f\r]*"
            +"[0-9]+"+"[ \t\n\f\r]*"+";",abdo);
   
    boolean d = Pattern.matches("[i][f]"+"([ \t\n\f\r]*[(])"+"[ \t\n\f\r]*"+"([a-zA-Z][0-9]*|| [a-zA-Z])+"+"[ \t\n\f\r]*"+"="+"[ \t\n\f\r]*"
            +"[0-9]+"+"[ \t\n\f\r]*"+"[(]"+"[ \t\n\f\r]*"+"([a-zA-Z][0-9]*|| [a-zA-Z])+"+"[ \t\n\f\r]*"+"="+"[ \t\n\f\r]*"+"([a-zA-Z][0-9]*|| [a-zA-Z])+"+"[ \t\n\f\r]*"+"/"+"[ \t\n\f\r]*"
            +"[0-9]+"+"[ \t\n\f\r]*"+";",abdo);
       // System.out.println("b= "+b+"  and d= "+ d);
   if ((b == true)||(d == true) )  {
  
    System.out.println("The Code is Correct");

[collin389]

Well that would've been impossible to determine based on your original question.