Expression Evaluator

Usage

import evaluator.ExpressionEvaluator;

class Main{
    public static void main(String[] args){
        try {
          String equation = "(1+i)^(2-i)+2^-i";
          ExpressionEvaluator exp = new ExpressionEvaluator();
          System.out.println("Result: " + exp.evaluateEquation(equation, 4, true));
      	}catch(Exception e) {
          e.printStackTrace();
      	}
    }
}

Output

SubEquation: 1+i
Evaluating : 1.00 + 1.00i
SubEquation: 2-i
Evaluating : 2.00 - 1.00i
Evaluating : (1.0 + i) ^ (2.00 - 1.00i)
Evaluating : 2.00 ^ -1.00i
Evaluating : (1.49 + 4.13i) + (0.77 - 0.64i)
Result: (2.2593 + 3.4868i)

Working with variables

import evaluator.ExpressionEvaluator;

class Main{
    public static void main(String[] args){
        try {
          String equation = "sin(cos(x+tan(x)))+cos(sin(x)-tan(x)) ";
          ExpressionEvaluator exp = new ExpressionEvaluator();
          exp.setVariable("x", 3.0);
          System.out.println("Result: " + exp.evaluateEquation(equation, 4, true));
      	}catch(Exception e) {
          e.printStackTrace();
      	}
    }
}

Output

SubEquation: cos(x+tan(x))
SubEquation: x+tan(x)
SubEquation: x
Evaluating : tan(3.0)
Evaluating : 3.0 + -0.14
Evaluating : cos(2.86)
Evaluating : sin(-0.96)
SubEquation: sin(x)-tan(x)
SubEquation: x
Evaluating : sin(3.0)
SubEquation: x
Evaluating : tan(3.0)
Evaluating : 0.14 - -0.14
Evaluating : cos(0.28)
Evaluating : -0.82 + 0.96
Result: 0.1409

Supported functions and variables

• pi : The constant $\pi$ (3.14)
• e : The euler number $e$ (2.7183)
• sin : The sine function.
• cos : The cosine function.
• tan : The tangent function.
• ln : The natural log function.
• log : The log function with base 10.

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Click here to access the documentation

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