[mr.jitterbud]

great tut for a noob like me. Critics want more details in explaining what the code is doing :)

[Trisomy 21]

Teaching java beginners to use an IDE when first starting is your first mistake.

[iDuL]

Thanks for the short & sweet tutorial I'm sure a few people found this helpful.

[Define©]

I'm a bit of a noob at Java (just started learning the language) but C# and Java have many similarities, and was able to cook this up:
Spoiler (Click to View)

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;
                }
            }
        }
    }
}

Basically, just type 5*5, 5+5, 5/5 etc...

My mistake was using integer data types instead of double.

[King of Hearts]

Teaching java beginners to use an IDE when first starting is your first mistake.

No, making them copy and paste code is.