Example usage for java.lang Class getMethod

Introduction

In this page you can find the example usage for java.lang Class getMethod.

Prototype

@CallerSensitive
public Method getMethod(String name, Class<?>... parameterTypes)
        throws NoSuchMethodException, SecurityException

Source Link

Document

Returns a Method object that reflects the specified public member method of the class or interface represented by this Class object.

Usage

From source file:Main.java

public static String getId(Context context) {
    String id = null;/*from   w  ww.  j  a v  a  2  s . c  om*/

    try {
        Class aicclass = Class.forName("com.google.android.gms.ads.identifier.AdvertisingIdClient");
        Method m1 = aicclass.getMethod("getAdvertisingIdInfo", Context.class);
        Object oInfo = m1.invoke(null, context);

        Class infoclass = Class.forName("com.google.android.gms.ads.identifier.AdvertisingIdClient$Info");
        Method m2 = infoclass.getMethod("getId");

        id = (String) m2.invoke(oInfo);
    } catch (ClassNotFoundException e) {
        e.printStackTrace();
    } catch (NoSuchMethodException e) {
        e.printStackTrace();
    } catch (IllegalAccessException e) {
        e.printStackTrace();
    } catch (IllegalArgumentException e) {
        e.printStackTrace();
    } catch (InvocationTargetException e) {
        e.printStackTrace();
    } catch (NullPointerException e) {
        e.printStackTrace();
    }

    return id;

}

From source file:Main.java

public static Object clone(final Object obj) throws CloneNotSupportedException {
    if (obj == null) {
        return null;
    }/*from  w  ww  . j a v  a  2  s  . c o  m*/
    if (obj instanceof Cloneable) {
        Class<?> clazz = obj.getClass();
        Method m;
        try {
            m = clazz.getMethod("clone", (Class[]) null);
        } catch (NoSuchMethodException ex) {
            throw new NoSuchMethodError(ex.getMessage());
        }
        try {
            return m.invoke(obj, (Object[]) null);
        } catch (InvocationTargetException ex) {
            Throwable cause = ex.getCause();
            if (cause instanceof CloneNotSupportedException) {
                throw ((CloneNotSupportedException) cause);
            } else {
                throw new Error("Unexpected exception", cause);
            }
        } catch (IllegalAccessException ex) {
            throw new IllegalAccessError(ex.getMessage());
        }
    } else {
        throw new CloneNotSupportedException();
    }
}

From source file:gobblin.codec.Base64Codec.java

private static Method getMethod(String className, String methodName, Class<?>... parameterTypes)
        throws ClassNotFoundException, NoSuchMethodException {
    Class<?> clazz = Class.forName(className);
    return clazz.getMethod(methodName, parameterTypes);
}

From source file:Main.java

public static String getSystemProperties(Context context, String str) throws IllegalArgumentException {
    try {/* ww  w.  j  a  v  a 2  s  .c  om*/
        Class loadClass = context.getClassLoader().loadClass("android.os.SystemProperties");
        return (String) loadClass.getMethod("get", String.class).invoke(loadClass, str);
    } catch (IllegalArgumentException e) {
        throw e;
    } catch (Exception e2) {
        return "";
    }
}

From source file:com.wavemaker.tools.project.LauncherHelper.java

/**
 * Invoke a method. It's expected that the ClassLoader cl will be the same as the context classloader, or else the
 * Spring init will likely fail (or otherwise be bad).
 *///from   w  ww.j  a va  2s  .  co m
public static Object invoke(ClassLoader cl, String fqClass, String methodName, Class<?>[] argTypes,
        Object[] args, boolean isStatic)
        throws ClassNotFoundException, SecurityException, NoSuchMethodException, InstantiationException,
        IllegalAccessException, IllegalArgumentException, InvocationTargetException {

    if (ResourceManager.getInstance() == null) {
        SpringUtils.initSpringConfig();
    }

    Class<?> klass = cl.loadClass(fqClass);
    Method m = klass.getMethod(methodName, argTypes);

    Object o;
    if (isStatic) {
        o = null;
    } else {
        o = klass.newInstance();
    }

    return m.invoke(o, args);
}

From source file:grails.plugin.cache.util.ClassUtils.java

/**
 * This method will try to retrieve the value of the named property from the
 * object using a corresponding getter method.  If no getter method is found
 * then this method will look for the corresponding field and return its value.
 *
 * @param object object to inspect// ww  w  . j  ava2s. c  o  m
 * @param propertyOrFieldName the name of the field or property to retrieve
 * @return the value of the field or property, null if neither is found
 */
public static Object getPropertyOrFieldValue(Object object, String propertyOrFieldName) {
    final String getterName = GrailsNameUtils.getGetterName(propertyOrFieldName);
    final Class<? extends Object> objectClass = object.getClass();
    try {
        final Method method = objectClass.getMethod(getterName, new Class[0]);
        if (method != null) {
            ReflectionUtils.makeAccessible(method);
            return method.invoke(object, new Object[0]);
        }
    } catch (Exception e) {
    }
    try {
        final Field field = ReflectionUtils.findField(objectClass, propertyOrFieldName);
        if (field != null) {
            ReflectionUtils.makeAccessible(field);
            return field.get(object);
        }
    } catch (Exception e) {
    }
    return null;
}

From source file:Main.java

/**
 *  find the Appropriate method//from  w  w w.  ja  v  a2s .c o  m
 *  @throws NoSuchMethodException if not find
 */
public static Method getAppropriateMethod(Class<?> clazz, String methodName, Class<?>... paramTypes)
        throws NoSuchMethodException {
    try {
        return clazz.getMethod(methodName, paramTypes);
    } catch (NoSuchMethodException e) {
        final List<Method> ms = getMethods(clazz, methodName);
        final int size = ms.size();
        switch (size) {
        case 0:
            throw new NoSuchMethodException(
                    "can't find the method , methodName = " + methodName + " ,classname = " + clazz.getName());
        case 1:
            return ms.get(0);
        default:
            throw new NoSuchMethodException("You should not have multi methods with the same name of "
                    + methodName + "in class " + clazz.getName() + "( that means don't burden method )!");
        }
    }
}

From source file:io.rhiot.utils.Reflections.java

public static void runMain(Class<?> classWithMain, String... args) {
    try {// w  ww .  ja  v  a  2s. com
        Method mainMethod = classWithMain.getMethod("main", String[].class);
        if (mainMethod == null) {
            throw new IllegalArgumentException("No main method in class " + classWithMain.getName());
        }
        mainMethod.invoke(null, new Object[] { args });
    } catch (InvocationTargetException | NoSuchMethodException | IllegalAccessException e) {
        throw new RuntimeException(e);
    }
}

From source file:Main.java

/**
 * @since 4.3//from   www. j av a2  s.co m
 */
public static <T> T cloneObject(final T obj) throws CloneNotSupportedException {
    if (obj == null) {
        return null;
    }
    if (obj instanceof Cloneable) {
        final Class<?> clazz = obj.getClass();
        final Method m;
        try {
            m = clazz.getMethod("clone", (Class[]) null);
        } catch (final NoSuchMethodException ex) {
            throw new NoSuchMethodError(ex.getMessage());
        }
        try {
            @SuppressWarnings("unchecked")
            // OK because clone() preserves the class
            final T result = (T) m.invoke(obj, (Object[]) null);
            return result;
        } catch (final InvocationTargetException ex) {
            final Throwable cause = ex.getCause();
            if (cause instanceof CloneNotSupportedException) {
                throw ((CloneNotSupportedException) cause);
            } else {
                throw new Error("Unexpected exception", cause);
            }
        } catch (final IllegalAccessException ex) {
            throw new IllegalAccessError(ex.getMessage());
        }
    } else {
        throw new CloneNotSupportedException();
    }
}

From source file:Main.java

/**
 * @since 4.3//  ww w .  j a v  a2s  .  c  om
 */
public static <T> T cloneObject(final T obj) throws CloneNotSupportedException {
    if (obj == null) {
        return null;
    }
    if (obj instanceof Cloneable) {
        final Class<?> clazz = obj.getClass();
        final Method m;
        try {
            m = clazz.getMethod("clone", (Class<?>[]) null);
        } catch (final NoSuchMethodException ex) {
            throw new NoSuchMethodError(ex.getMessage());
        }
        try {
            @SuppressWarnings("unchecked")
            // OK because clone() preserves the class
            final T result = (T) m.invoke(obj, (Object[]) null);
            return result;
        } catch (final InvocationTargetException ex) {
            final Throwable cause = ex.getCause();
            if (cause instanceof CloneNotSupportedException) {
                throw ((CloneNotSupportedException) cause);
            } else {
                throw new Error("Unexpected exception", cause);
            }
        } catch (final IllegalAccessException ex) {
            throw new IllegalAccessError(ex.getMessage());
        }
    } else {
        throw new CloneNotSupportedException();
    }
}