As of Java 7 we can write a switch case statement that works on strings. This new capability might assist us with writing a shorter code.
package com.abelski.samples;
public class Demo
{
public static void main(String[] args)
{
String operator = args[1];
double numA = Double.parseDouble(args[0]);
double numB = Double.parseDouble(args[2]);
String result;
switch(operator)
{
case "+":
result = numA+"+"+numB+"="+(numA + numB);
break;
case "-":
result = numA+"-"+numB+"="+(numA-numB);
break;
case "*":
result = numA+"*"+numB+"="+(numA*numB);
break;
case "/":
result = numA+"/"+numB+"="+(numA/numB);
break;
default:
result = "you can use one of the following operators +,-,/ or *";
break;
}
System.out.println(result);
}
}
The following video clip overviews this code sample and shows its execution.
