利用JavaScript来执行运算
四则运算
https://www.nowcoder.com/practice/9999764a61484d819056f807d2a91f1e
import java.util.*;
import javax.script.*;
public class Main {
public static void main(String[] args) throws ScriptException {
Scanner scan = new Scanner(System.in);
String input = scan.nextLine();
input = input.replace("[", "(");
input = input.replace("]", ")");
input = input.replace("{", "(");
input = input.replace("}", ")");
// 获取脚本引擎管理器
ScriptEngineManager manager = new ScriptEngineManager();
// 获取Script脚本引擎
ScriptEngine engine = manager.getEngineByName("JavaScript");
System.out.println(engine.eval(input));
}
}
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