java识别加减运算验证码

[我还是个妹子啊]

用java写一个程序，用来识别加减运算验证码，求大佬分享

[qybao]

是这个意思吗？例计算4+5

String a = "4", b = "5";
ScriptEngineManager manager = new ScriptEngineManager();
ScriptEngine engine = manager.getEngineByName("js");
Object result = System.out.printf("%s*%s=%s\n", a, b, engine.eval(a + "+" + b));

[maradona1984]

引用 1 楼 qybao 的回复:

是这个意思吗？例计算4+5

String a = "4", b = "5";
ScriptEngineManager manager = new ScriptEngineManager();
ScriptEngine engine = manager.getEngineByName("js");
Object result = System.out.printf("%s*%s=%s\n", a, b, engine.eval(a + "+" + b));

这个也太取巧了点,人家求作业,你怎么也得给他个中缀表达式转后缀的给他啊~~~