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e118. Getting the Methods of a Class Object
There are three ways of obtaining a Method object from a
Class object.
Class cls = java.lang.String.class;
// By obtaining a list of all declared methods.
Method[] methods = cls.getDeclaredMethods();
// By obtaining a list of all public methods, both declared and inherited.
methods = cls.getMethods();
for (int i=0; i<methods.length; i++) {
Class returnType = methods[i].getReturnType();
Class[] paramTypes = methods[i].getParameterTypes();
process(methods[i]);
}
// By obtaining a particular Method object.
// This example retrieves String.substring(int).
try {
Method method = cls.getMethod("substring", new Class[] {int.class});
process(method);
} catch (NoSuchMethodException e) {
}
e119.
Invoking a Method Using a Method Object
© 2002 Addison-Wesley.
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