Think in java--工具类--获取类中方法

下面代码，运行时传入类名，即可获取到类的相关信息。

//: typeinfo/ShowMethods.java// Using reflection to show all the methods of a class,// even if the methods are defined in the base class.// {Args: ShowMethods}import java.lang.reflect.*;import java.util.regex.*;import static net.mindview.util.Print.*;public class ShowMethods {    private static String usage = "usage:\n"            + "ShowMethods qualified.class.name\n"            + "To show all methods in class or:\n"            + "ShowMethods qualified.class.name word\n"            + "To search for methods involving 'word'";    private static Pattern p = Pattern.compile("\\w+\\.");    public static void main(String[] args) {        if (args.length < 1) {            System.out.println(usage);            System.exit(0);        }        int lines = 0;        try {            Class<?> c = Class.forName(args[0]);            Method[] methods = c.getMethods();            Constructor[] ctors = c.getConstructors();            if (args.length == 1) {                for (Method method : methods)                    System.out.println(p.matcher(method.toString()).replaceAll(""));                for (Constructor ctor : ctors)                    System.out.println(p.matcher(ctor.toString()).replaceAll(""));                lines = methods.length + ctors.length;            } else {                for (Method method : methods)                    if (method.toString().indexOf(args[1]) != -1) {                        System.out.println(p.matcher(method.toString()).replaceAll(""));                        lines++;                    }                for (Constructor ctor : ctors)                    if (ctor.toString().indexOf(args[1]) != -1) {                        System.out.println(p.matcher(ctor.toString()).replaceAll(""));                        lines++;                    }            }        } catch (ClassNotFoundException e) {            System.out.println("No such class: " + e);        }    }}