Java 里面有没有类似于 js 的 Function.length 方法，返回参数个数

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js 参考

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/length

java 有对应的吗?

3 replies • 2019-07-19 13:09:13 +08:00

bumz

Jul 13, 2019 via iPhone

Reflection

lavvrence

Jul 19, 2019

同楼上，反射.
```
public static void main(String[] args) throws ClassNotFoundException {
Class clazz = Class.forName("com.reflection.People");
Method[] methods = clazz.getDeclaredMethods();
for (Method method : methods) {
System.out.println(method.getName());
Parameter[] parameters = method.getParameters();
for (Parameter parameter : parameters) {
System.out.println(parameter.getName());
}
}
}
```

qwertyegg

Jul 19, 2019

多谢 @bumz @jaylee4869