Try to extract java public method

I think I need a program to extract java public methods at work, so I wrote it Try to implement using Java7's NewIO and Java8's Stream functions

package triple;

import java.nio.charset.Charset;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.nio.file.StandardOpenOption;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class JavaFileAnalyser {
	private static Pattern PATTERN ;
	public static void main(String args[]) throws Exception{
		PATTERN = Pattern.compile(".*public(.*)(?:\\s|\\t)(.*)\\((.*)\\).*");
		List<String> list = Files.newBufferedReader(
	public static boolean isMethod(String str){
			return true;
		return false;
	public static String parse(String str){
		Matcher m = PATTERN.matcher(str); 
			return String.format("Return signature: %s method name:%s argument:%s",,,;
		return "";

Return signature:Method name:AbstractScriptEngine argument:
Return signature:AbstractScriptEngine method name:argument:Bindings n
Return signature:void method name:setContext argument:ScriptContext ctxt
Return signature:ScriptContext method name:getContext argument:
Return signature:Bindings method name:getBindings argument:int scope
Return signature:void method name:setBindings argument:Bindings bindings, int scope
Return signature:void method name:put argument:String key, Object value
Return signature:Object method name:get argument:String key
Return signature:Object method name:eval argument:Reader reader, Bindings bindings 
Return signature:Object method name:eval argument:String script, Bindings bindings
Return signature:Object method name:eval argument:Reader reader
Return signature:Object method name:eval argument:String script

It seems that the constructor information has also been acquired, but I will not care about the details (hey)

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