by Sai gowtham

How to evaluate string math expression In Java

This below example will show you how to evaluate a string math expression in Java.

import javax.script.ScriptEngineManager;
import javax.script.ScriptEngine;
import javax.script.ScriptException;

public class Main {
  public static void main(String[] args) throws ScriptException {
    ScriptEngineManager mgr = new ScriptEngineManager();
    ScriptEngine engine = mgr.getEngineByName("JavaScript");
    String sum = "1+2+3+4";
    System.out.println(engine.eval(sum));
  }
}

Output:

10

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