Definitely follow h.j.k's guidance here, especially concerning the variable names, they stand out as unconventional and looked like classes, at a glance.
Since this is meant to be a console calculator, you may want to consider is optionally reading and running from the arguments.
Something along the lines of:
public static void main(String[] args) {
if (args.length == 3) {
parse(args);
} else {
// run your current version
}
}
public static void parse(String[] args) {
double first = Double.parseDouble(args[0]);
char operator = args[1].charAt(0);
double second = Double.parseDouble(args[2]);
System.out.println(compute(first, operator, second));
}
public static double compute(double num1, char operator, double num2) {
double result = 0;
switch(operator) {
case '+':
result = num1 + num2;
break;
case '-':
result = num1 - num2;
break;
case 'x':
result = num1 * num2;
break;
case '/':
result = num1 / num2;
break;
case '%':
result = num1 % num2;
break;
}
return result;
}
So you can optionally do it the input -response - output method, or simply call it with what you want to be computed:
Sample output:
Java Algorithm1 3 * 5
15.0
Java Algorithm1 120 % 14
8.0
Of course whether you want the operator to come first, want to add support for unlimited arguments, checks for division by 0 or more is up to you, and would make for a good exercise.
