Calculator V1

Calculator.java

package meshredded;

import java.util.ArrayList;
import java.util.List;

class Calculator {

	public static void main(String[] args) {

		List<String> entries = new ArrayList<>();
		entries.add("3 + 5");
		entries.add("4 - 1");
		entries.add("6 / 2");
		entries.add("3 * 2");

		entries.forEach(entry -> {

			String[] splited = entry.split("\\+|\\-|\\/|\\*");
			int left = new Integer(splited[0].trim());
			int right = new Integer(splited[1].trim());
			String symbol = entry.replaceAll("[0-9]|\\s", "");

			int result = 0;
			switch (symbol) {
			case "+":
				result = left + right;
				break;
			case "-":
				result = left - right;
				break;
			case "*":
				result = left * right;
				break;
			case "/":
				result = left / right;
				break;
			}
			System.out.println(entry + " = " + result);
		});
	}
}