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Retos/Reto #28 - EXPRESIÓN MATEMÁTICA [Media]/java/EspinoLeandroo.java
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public class EspinoLeandroo { | ||
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public static void main(String[] args) { | ||
String expression1 = "5 + 16 / 7 - 4"; | ||
String expression2 = "5 a 6"; | ||
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System.out.println(validateMathExpression(expression1)); | ||
System.out.println(validateMathExpression(expression2)); | ||
} | ||
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public static boolean validateMathExpression(String expression) { | ||
String[] tokens = expression.split("\\s+"); | ||
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if (tokens.length % 2 == 0) { | ||
return false; | ||
} | ||
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for (int i = 0; i < tokens.length; i++) { | ||
if (i % 2 == 0) { | ||
if (!isNumber(tokens[i])) { | ||
return false; | ||
} | ||
} else { | ||
if (!isOperation(tokens[i])) { | ||
return false; | ||
} | ||
} | ||
} | ||
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return true; | ||
} | ||
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private static boolean isNumber(String token) { | ||
try { | ||
Double.parseDouble(token); | ||
return true; | ||
} catch (NumberFormatException e) { | ||
return false; | ||
} | ||
} | ||
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private static boolean isOperation(String token) { | ||
return token.matches("[+\\-*/%]"); | ||
} | ||
} |