[标题]:对Class.getMethod()的调用未经检查
[时间]:2009-4-5
[摘要]:警告:[unchecked]对作为普通类型 java.lang.Class 的成员的 getMethod(java.lang.String,java.lang.Class <?>...) 的调用未经检查.
[关键字]:Class,getMethod,unchecked,反射,reflection,范型
[环境]:JDK6
[作者]:Winty (wintys@gmail.com)
[错误]:
Class myClass = MethodPointerTest.class;
Method add = myClass.getMethod("add" , int.class , int.class );
上述代码出现如下警告:
警告:[unchecked]对作为普通类型 java.lang.Class 的成员的 getMethod(java.lang.String,java.lang.Class <?>...) 的调用未经检查.
[解决]:
是范型在作怪。Class修改为Class<?>:
Class<?> myClass = MethodPointerTest.class;
Method add = myClass.getMethod("add" , int.class , int.class );
分享到:
相关推荐
NULL 博文链接:https://sxk4429.iteye.com/blog/645624
at java.lang.Class.getMethod0(Unknown Source) at java.lang.Class.getMethod(Unknown Source) at sun.launcher.LauncherHelper.getMainMethod(Unknown Source) at sun.launcher.LauncherHelper....
Method method = ownerClass.getMethod(methodName, argsClass):通过Method名和参数的Class数组得到要执行的Method。 method.invoke(owner, args):执行该Method,invoke方法的参数是执行这个方法的对象,和参数...
Method concat = String.class.getMethod("concat", new Class[]{String.class}); Method println = PrintStream.class.getMethod("println", new Class[]{String.class}); builder.constant("hello") //定义常量 ....
Method method = Class.forName("android.app.ActivityManager").getMethod("forceStopPackage", String.class); method.invoke(mActivityManager, packageName); //packageName是需要强制停止的应用程序包名
try { Method m1 = department.getClass().getMethod("getEmployees"); Employee employees = (Employee[]) m1.invoke(department); for (Employee employee : employees) { Method m2 = employee.getClass()....
NULL 博文链接:https://bijian1013.iteye.com/blog/2310211
Method method1=c.getMethod("setPwd", new Class[]{String.class}); method1.invoke(obj, new Object[]{"222"}); Method method2=c.getMethod(method_name, new Class[0]); method2.invoke(obj, new Object...
Class对象.getConstructor(参数类型的Class对象 如 String.class); 获得指定参数的公共构造方法 Class对象.getConstructors(); 获得全部公共的构造方法 Class对象.getMethod(“方法名的字符串”,方法的参数类型的...
TypMis .GetMethod("PutValue").Invoke(mispos, new Object[] { "CardType", "01" }TypMis .GetMethod("PutValue").Invoke(mispos, new Object[] { "CardType", "01" }TypMis .GetMethod("PutValue").Invoke(mispos,...
Method method = Class.forName("android.app.ActivityManager").getMethod("forceStopPackage",String.class); method.invoke(mActivityManager, pkgList[j]); // packageName是需要强制停止的应用...
Method method = pm.getClass().getMethod("deleteApplicationCacheFiles", String.class,IPackageDataObserver.class); method.invoke(pm, packageName,new IPackageDataObserver.Stub(){ @Override public void ...
SortTest.class.getMethod(s, Number[].class).invoke(this, (Object)testNum); long end=System.currentTimeMillis(); System.out.println(s+":"+(end-begin)+"\t"); System.out.println(Arrays....
Method charAt = Class.forName("java.lang.String").getMethod("charAt", int.class); System.out.println(charAt.invoke(str, 1)); ------------------------- 讲Field //成员变量 ReflectPoint point = new ...
在这个例子中,记录日志的代码并没有横切到我们的业务代码中,LogBeforeAdvice和HttpMessageSender彼此不知道对方的存在,而且我们的应用程序AdviceDemo对LogBeforeAdvice的存在也是一无所知。假如有一天我们的应用...
MethodInfo method = type.GetMethod(methodName); object[] parameters = new object[] { param }; // 创建实例;调用方法(传递参数,获取返回值) object instance = assembly.CreateInstance(type.ToString()...
private static final Log log = LogFactory.getLog(Bootstrap.class); /** * Daemon object used by main. */ private static Bootstrap daemon = null; private static final File catalinaBaseFile; ...
var propMethod = ctxType.GetMethod("set_ParameterArgs"); il.Emit(OpCodes.Ldloc, ctx); il.Emit(OpCodes.Ldloc_0); il.Emit(OpCodes.Call, propMethod); int m = attrs.Length; LocalBuilder[] lbs = new...
Method m = o.getClass().getMethod(methodName, beanObject.getClass().getInterfaces()[0]); m.invoke(o, beanObject); } } } @Override public Object getBean(String name) { return ...
Method method1 = Methods.get(MyClass.class, MyClass::noArgsMethod); Method method2 = Methods.get(MyClass.class, c -> c.methodWithArgs(arg1, arg2)); 捕获带有参数的方法调用。 Invocation invocation = ...