随便记两笔Java中的反射

dai_lm

1. 声明对象（调用无参的构造函数）
Class<?> clz = Class.forName("package.ClassName");Object obj = clz.newInstance();
2. 声明方法
Class<?> clz = Class.forName("package.ClassName");Method method1 = clz.getMethod("method_without_parameter");method1.invoke(obj);Method method2 = clz.getMethod("method_with_parameter", String.Class);Object obj = clz.newInstance();method2.invoke(obj, "hello");
3. 参数为数组
Class<?> clz = Class.forName("package.ClassName");Class[] cl = new Class[1];cl[0] = String[].class;Method method = clz.getMethod("run", cl);Object[] in = new Object[1];String[] param = new String[1];param[0] = "hello";in[0] = param;Object obj = clz.newInstance();method.invoke(obj, in);