Think in java--工具类--获取类中方法

//: 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);
}
}
}