https://github.com/saksham-joshi/eval-java

With insane speed, solve mathematical expressions at runtime in a string using "Evaluater" class in Java.
https://github.com/saksham-joshi/eval-java

evaluation java math mathematical-expressions solver

Last synced: 10 months ago
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With insane speed, solve mathematical expressions at runtime in a string using "Evaluater" class in Java.

• Host: GitHub
• URL: https://github.com/saksham-joshi/eval-java
• Owner: saksham-joshi
• License: gpl-3.0
• Created: 2023-08-30T12:15:03.000Z (almost 3 years ago)
• Default Branch: main
• Last Pushed: 2025-01-10T03:11:39.000Z (over 1 year ago)
• Last Synced: 2025-06-06T13:03:16.938Z (about 1 year ago)
• Topics: evaluation, java, math, mathematical-expressions, solver
• Language: Java
• Homepage:
• Size: 30.3 KB
• Stars: 8
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# 🔢 Eval-Java 🔢

#### Python has a function called eval() used to solve mathematical expressions in a string but Java has nothing like this, so i developed this algorithm which can do so.

  **You can use this package to create a calculator which can solve complex mathematical expressions.**

> #### ```Average Time Complexity: **O(n)**```

> #### ```Average Space Complexity: **O(k + m)**```

## 📝 Sample code 

```java

import evaluater.Evaluater;

import evaluater.EvaluaterExceptions;

public class sample {

    public static void main(String[] args)

    {

        try

        {

            

            Evaluater eval = new Evaluater("1280.33/(12*-10.11)");

            System.out.println(eval.evaluate());

        }

        catch(EvaluaterExceptions.InvalidMathExpression excep)

        {

            System.out.println(excep);

        }

    }

    

}

```

> #### **NOTE:** ```evaluate() methods throw InvalidMathExpression exception if the given expression is invalid. ```

## ➗ Supported operators ➕

| Operators    |   Name         | Precedence      |

| :-------:    |  :-------:     | :-----------:   |

| **+**        | Addition       |       `1`       |

| **-**        | Subtraction    |       `1`       |

| **x,*,X**    | Multiplication |       `2`       |

| **/,÷**      | Division       |       `2`       |

| **%**        | Modulus        |       `2`       |

| **^**        | Power          |       `3`       |

| **!**        | Not            |       `4`       |

## 🔗 Developer Links

[![portfolio](https://img.shields.io/badge/my_portfolio-000?style=for-the-badge&logo=ko-fi&logoColor=white)](https://sakshamjoshi.vercel.app/)

[![linkedin](https://img.shields.io/badge/linkedin-0A66C2?style=for-the-badge&logo=linkedin&logoColor=white)](https://www.linkedin.com/in/sakshamjoshi27)

[![Github](https://img.shields.io/badge/Visit_my-Github-purple)](https://github.com/saksham-joshi)

[![X(Twitter)](https://img.shields.io/twitter/follow/sakshamjoshi27

)](https://x.com/sakshamjoshi27)

[![Static Badge](https://img.shields.io/badge/mail_at-social.sakshamjoshi%40gmail.com-aqua)](mailto:social.sakshamjoshi@gmail.com)

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