java.lang.Class.getMethod()方法的使用及代码示例

x33g5p2x  于2022-01-16 转载在 其他  
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本文整理了Java中java.lang.Class.getMethod()方法的一些代码示例，展示了Class.getMethod()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Class.getMethod()方法的具体详情如下：
包路径：java.lang.Class
类名称：Class
方法名：getMethod

Class.getMethod介绍

[英]Returns a Method object which represents the public method with the given name and parameter types. (Class[]) null is equivalent to the empty array.

This method first searches the class C represented by this Class, then the superclasses of C, and finally the interfaces implemented by C and its superclasses.

Use #getDeclaredMethod if you don't want to search superclasses.
[中]返回一个方法对象，该对象表示具有给定名称和参数类型的公共方法。（类[]）null相当于空数组。
该方法首先搜索由该类表示的类C，然后搜索C的超类，最后搜索由C及其超类实现的接口。
如果不想搜索超类，请使用#getDeclaredMethod。

代码示例

代码示例来源：origin: google/guava

private static boolean hasTest(Class<?> testClass, Iterable<String> testNames) {
 for (String testName : testNames) {
  try {
   testClass.getMethod(testName);
   return true;
  } catch (NoSuchMethodException e) {
   continue;
  }
 }
 return false;
}

代码示例来源：origin: google/guava

private static Method getAddSuppressed() {
 try {
  return Throwable.class.getMethod("addSuppressed", Throwable.class);
 } catch (Throwable e) {
  return null;
 }
}

代码示例来源：origin: google/guava

@Override
 String typeName(Type type) {
  try {
   Method getTypeName = Type.class.getMethod("getTypeName");
   return (String) getTypeName.invoke(type);
  } catch (NoSuchMethodException e) {
   throw new AssertionError("Type.getTypeName should be available in Java 8");
  } catch (InvocationTargetException | IllegalAccessException e) {
   throw new RuntimeException(e);
  }
 }
},

代码示例来源：origin: square/okhttp

private boolean api24IsCleartextTrafficPermitted(String hostname, Class<?> networkPolicyClass,
  Object networkSecurityPolicy) throws InvocationTargetException, IllegalAccessException {
 try {
  Method isCleartextTrafficPermittedMethod = networkPolicyClass
    .getMethod("isCleartextTrafficPermitted", String.class);
  return (boolean) isCleartextTrafficPermittedMethod.invoke(networkSecurityPolicy, hostname);
 } catch (NoSuchMethodException e) {
  return api23IsCleartextTrafficPermitted(hostname, networkPolicyClass, networkSecurityPolicy);
 }
}

代码示例来源：origin: square/okhttp

public CertificateChainCleaner buildCertificateChainCleaner(X509TrustManager trustManager) {
 try {
  Class<?> extensionsClass = Class.forName("android.net.http.X509TrustManagerExtensions");
  Constructor<?> constructor = extensionsClass.getConstructor(X509TrustManager.class);
  Object extensions = constructor.newInstance(trustManager);
  Method checkServerTrusted = extensionsClass.getMethod(
    "checkServerTrusted", X509Certificate[].class, String.class, String.class);
  return new AndroidCertificateChainCleaner(extensions, checkServerTrusted);
 } catch (Exception e) {
  throw new AssertionError(e);
 }
}

代码示例来源：origin: square/okhttp

private boolean api23IsCleartextTrafficPermitted(String hostname, Class<?> networkPolicyClass,
  Object networkSecurityPolicy) throws InvocationTargetException, IllegalAccessException {
 try {
  Method isCleartextTrafficPermittedMethod = networkPolicyClass
    .getMethod("isCleartextTrafficPermitted");
  return (boolean) isCleartextTrafficPermittedMethod.invoke(networkSecurityPolicy);
 } catch (NoSuchMethodException e) {
  return super.isCleartextTrafficPermitted(hostname);
 }
}

代码示例来源：origin: google/guava

@GwtIncompatible // reflection
 public static Method getMethod(Class<?> clazz, String name) {
  try {
   return clazz.getMethod(name);
  } catch (Exception e) {
   throw new IllegalArgumentException(e);
  }
 }
}

代码示例来源：origin: square/okhttp

@Override public boolean isCleartextTrafficPermitted(String hostname) {
 try {
  Class<?> networkPolicyClass = Class.forName("android.security.NetworkSecurityPolicy");
  Method getInstanceMethod = networkPolicyClass.getMethod("getInstance");
  Object networkSecurityPolicy = getInstanceMethod.invoke(null);
  return api24IsCleartextTrafficPermitted(hostname, networkPolicyClass, networkSecurityPolicy);
 } catch (ClassNotFoundException | NoSuchMethodException e) {
  return super.isCleartextTrafficPermitted(hostname);
 } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
  throw new AssertionError("unable to determine cleartext support", e);
 }
}

代码示例来源：origin: ReactiveX/RxJava

ParamOverride(Class<?> clazz, int index, ParamMode mode, String name, Class<?>... arguments) {
  this.clazz = clazz;
  this.index = index;
  this.mode = mode;
  this.name = name;
  this.arguments = arguments;
  try {
    clazz.getMethod(name, arguments);
  } catch (Exception ex) {
    throw new AssertionError(ex);
  }
}

代码示例来源：origin: google/guava

private static Subscriber subscriber(
  EventBus bus, Object target, String methodName, Class<?> eventType) {
 try {
  return Subscriber.create(bus, target, target.getClass().getMethod(methodName, eventType));
 } catch (NoSuchMethodException e) {
  throw new AssertionError(e);
 }
}

代码示例来源：origin: google/guava

public void testMethod_notDeclaredByType() throws NoSuchMethodException {
 Method sizeMethod = Map.class.getMethod("size");
 try {
  TypeToken.of(List.class).method(sizeMethod);
  fail();
 } catch (IllegalArgumentException expected) {
 }
}

代码示例来源：origin: google/guava

public void testResolveType() throws Exception {
 Method getFromList = List.class.getMethod("get", int.class);
 TypeToken<?> returnType =
   new TypeToken<List<String>>() {}.resolveType(getFromList.getGenericReturnType());
 assertEquals(String.class, returnType.getType());
}

代码示例来源：origin: google/guava

public void testMethod_declaredBySuperclass() throws Exception {
 Method toStringMethod = Object.class.getMethod("toString");
 ImmutableList<String> list = ImmutableList.of("foo");
 assertEquals(list.toString(), TypeToken.of(List.class).method(toStringMethod).invoke(list));
}

代码示例来源：origin: google/guava

public <T extends Number & List<String>> void testMethod_returnType_resolvedAgainstTypeBound()
  throws NoSuchMethodException {
 Method getMethod = List.class.getMethod("get", int.class);
 Invokable<T, String> invokable =
   new TypeToken<T>(getClass()) {}.method(getMethod).returning(String.class);
 assertEquals(TypeToken.of(String.class), invokable.getReturnType());
}

代码示例来源：origin: google/guava

public <T extends List<String>> void testMethod_parameterTypes() throws NoSuchMethodException {
 Method setMethod = List.class.getMethod("set", int.class, Object.class);
 Invokable<T, ?> invokable = new TypeToken<T>(getClass()) {}.method(setMethod);
 ImmutableList<Parameter> params = invokable.getParameters();
 assertEquals(2, params.size());
 assertEquals(TypeToken.of(int.class), params.get(0).getType());
 assertEquals(TypeToken.of(String.class), params.get(1).getType());
}

代码示例来源：origin: google/guava

public void testStaticOneArgMethodsThatShouldFail() throws Exception {
 for (String methodName : STATIC_ONE_ARG_METHODS_SHOULD_FAIL) {
  Method method = OneArg.class.getMethod(methodName, String.class);
  boolean foundProblem = false;
  try {
   new NullPointerTester().testMethodParameter(new OneArg(), method, 0);
  } catch (AssertionFailedError expected) {
   foundProblem = true;
  }
  assertTrue("Should report error in method " + methodName, foundProblem);
 }
}

代码示例来源：origin: google/guava

public void testNonStaticOneArgMethodsThatShouldPass() throws Exception {
 OneArg foo = new OneArg();
 for (String methodName : NONSTATIC_ONE_ARG_METHODS_SHOULD_PASS) {
  Method method = OneArg.class.getMethod(methodName, String.class);
  try {
   new NullPointerTester().testMethodParameter(foo, method, 0);
  } catch (AssertionFailedError unexpected) {
   fail("Should not have flagged method " + methodName);
  }
 }
}

代码示例来源：origin: google/guava

public void testTwoArgNullableNullable() throws Exception {
 Method method = TwoArg.class.getMethod("nullableNullable", String.class, Integer.class);
 for (TwoArg.Action first : TwoArg.Action.values()) {
  for (TwoArg.Action second : TwoArg.Action.values()) {
   TwoArg bar = new TwoArg(first, second);
   verifyBarPass(method, bar); // All args nullable:  anything goes!
  }
 }
}

代码示例来源：origin: google/guava

public void testMessageNoException() throws Exception {
 Method method = OneArg.class.getMethod("staticOneArgShouldThrowNpeButDoesnt", String.class);
 boolean foundProblem = false;
 try {
  new NullPointerTester().testMethodParameter(new OneArg(), method, 0);
 } catch (AssertionFailedError expected) {
  assertThat(expected.getMessage()).contains("index 0");
  assertThat(expected.getMessage()).contains("[null]");
  foundProblem = true;
 }
 assertTrue("Should report error when no exception is thrown", foundProblem);
}

代码示例来源：origin: google/guava

@AndroidIncompatible // Android runs ExampleDerivedInterfaceTester directly if it exists
public void testBuildTesterRequirements_methodClassConflict() throws Exception {
 final Method method =
   ExampleDerivedInterfaceTester.class.getMethod("testRequiringConflictingFeatures");
 try {
  FeatureUtil.buildTesterRequirements(method);
  fail("Expected ConflictingRequirementsException");
 } catch (ConflictingRequirementsException e) {
  assertThat(e.getConflicts()).contains(ExampleBaseFeature.BASE_FEATURE_1);
  assertEquals(method, e.getSource());
 }
}

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