Java [TUT]Your First Calculator in Four Easy Steps[TUT]

Code
package test;



import java.util.Scanner;



public class start {



    static Scanner input = new Scanner(System.in);

    //static String calc = input.next();



    static int equas=1;



    static Boolean loop = true;

    static Boolean errorLoop = true;



    public static void main(String[] args){    



        while(loop){

            //System.out.print("\f");



            errorLoop = true;    //reset the value



            String calc = input.next();



            if(calc.contains("*"))equas = 1;

            else if(calc.contains("/")) equas = 2;

            else if(calc.contains("+")) equas = 3;

            else if(calc.contains("-")) equas = 4;



            try{

                if(equas==1){ 

                    String[] numbers = calc.split("\\*");



                    int a = Integer.parseInt(numbers[0]);

                    a *= Integer.parseInt(numbers[1]);



                    System.out.print(numbers[0] + " x " + numbers[1] + " = " + a + "\n");

                }



                else if(equas==2){ 

                    String[] numbers = calc.split("/");



                    int a = Integer.parseInt(numbers[0]);

                    a /= Integer.parseInt(numbers[1]);



                    System.out.print(numbers[0] + " ÷ " + numbers[1] + " = " + a + "\n");

                }



                else if(equas==3){ 

                    String[] numbers = calc.split("\\+");



                    int a = Integer.parseInt(numbers[0]);

                    a += Integer.parseInt(numbers[1]);



                    System.out.print(numbers[0] + " + " + numbers[1] + " = " + a + "\n");

                }



                else if(equas==4){ 

                    String[] numbers = calc.split("-");



                    int a = Integer.parseInt(numbers[0]);

                    a -= Integer.parseInt(numbers[1]);



                    System.out.print(numbers[0] + " - " + numbers[1] + " = " + a + "\n");

                }

            }

            catch(Exception E){

                if(errorLoop){    //bug fix

                    System.out.print("Error on syntax. You typed the equasion wrong, ex... 5+5, 5*5");

                    errorLoop = false;

                }

            }

        }

    }

}