import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; public class ReflectionDemo1 { public static void main(String[] args) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException { // 实例化字符串对象 String name = new String("Colorful"); // 获取 method 对象 Method method = String.class.getMethod("replace", CharSequence.class, CharSequence.class); // 调用 invoke() 执行方法 String result = (String) method.invoke(name, "ful", ""); System.out.println(result); } }