Merge pull request #4387 from ASJordi/main

Reto #28 - Java

Retos/Reto #28 - EXPRESIÓN MATEMÁTICA [Media]/java/asjordi.java

@@ -0,0 +1,35 @@
+public class MathematicalExpression {
+
+    public static boolean check(String expression){
+
+        String[] components = expression.split(" ");
+
+        if (components.length < 3 || components.length % 2 == 0) return false;
+
+        boolean check = true;
+
+        for (int i = 0; i < components.length; i++) {
+            if (i % 2 == 0) check = isNumber(components[i]);
+            else check = isOperation(components[i]);
+
+            if (!check) return false;
+        }
+
+        return check;
+
+    }
+
+    private static boolean isNumber(String str) {
+        try {
+            Double.parseDouble(str);
+            return true;
+        } catch (NumberFormatException e) {
+            return false;
+        }
+    }
+
+    private static boolean isOperation(String str) {
+        return str.matches("[+\\-*/%]");
+    }
+
+}