how add parse in scanner

[asabdo]

how add parse in scanner
this is code take if statement and split to types
and i want to add to code parse
where check if statement that is in code with if correct statement and know do it is correct or no ?
plz anyone help me and thank you

import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Scanner;
 
public class Main {
  public static void main(String args[]) throws IOException {
    int i;
    double d;
    boolean b;
    String str;
    String str1;
    String str2;
    String str3;
    String str4;
    String str5;
 
    FileWriter fout = new FileWriter("test.txt");
    fout.write("if int a = 30 int c = a / 5 ;");
    fout.close();
 
    FileReader fin = new FileReader("Test.txt");
 
    Scanner src = new Scanner(fin);
 
    while (src.hasNext()) {
      if (src.hasNextInt()) {
        i = src.nextInt();
        System.out.println("int: " + i);
      } else if (src.hasNextDouble()) {
        d = src.nextDouble();
        System.out.println("double: " + d);
      } else if (src.hasNextBoolean()) {
        b = src.nextBoolean();
        System.out.println("boolean: " + b);
      } else  if (src.hasNext("if")){
        str = src.next("if");
        System.out.println("Resrved words: " + str);
      }
      else  if (src.hasNext("=")){
        str1 = src.next("=");
        System.out.println("Compute: " + str1);
      }
      else  if (src.hasNext(";")){
        str2 = src.next(";");
        System.out.println("Compute: " + str2);
      }
      else  if (src.hasNext("/")){
        str2 = src.next("/");
        System.out.println("Compute: " + str2);
      }
      /*else  if (src.hasNext("(")){
        str3 = src.next("(");
        System.out.println("Compute: " + str3);
      }
      else  if (src.hasNext(")")){
        str4 = src.next(")");
        System.out.println("Compute: " + str4);
      }*/
      else  if (src.hasNext("==")){
        str5 = src.next("==");
        System.out.println("Logical: " + str5);
      }
      else  if (src.hasNext("==")){
        str5 = src.next("==");
        System.out.println("Logical: " + str5);
      }
      else {
          str = src.next();
        System.out.println("Variables: " + str);
      }
 
    }
    fin.close();
  }
}

[RedSon]

It looks like you are already parsing src. I don't understand what you are trying to add to your program.