Posted In: Java Core, String
How to parse a mathematical expression given as a string – using ScriptEngine
Evaluating a math expression given in string form
package com.example.mathexpression;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import org.junit.Test;
public class MathExpression2 {
@Test
public void evaluate1() throws Exception {
System.out.println("\nevaluate1() start");
ScriptEngineManager mgr = new ScriptEngineManager();
ScriptEngine engine = mgr.getEngineByName("JavaScript");
String result = "5+4*(7-15)";
System.out.println(engine.eval(result));
}
}
Tags: String mathematical expression
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