akirad’s gists

akirad / SnmpTrapClient.java

Created April 24, 2016 10:56

A sample to send a snmp trap data.

	// A sample to send a trap data.
	// Ref.
	// http://jis.hatenablog.com/entry/2013/09/05/134001
	// https://www.qoosky.net/techs/f8c35bb5d7

	import java.net.DatagramPacket;
	import java.net.DatagramSocket;
	import java.net.InetAddress;

	public class SnmpTrapClient {

akirad / testByte.java

Created April 23, 2016 10:44

A memo to use byte in java code.

	public class testByte {

	public static void main(String[] args) {
	byte byteData = (byte) 0xC7; // 11000111
	// If there is no "(byte)", 0xC7 is looked as int.
	System.out.println(byteData); // -57

	int intData = 0xC7; // 00000000 00000000 00000000 11000111
	System.out.println(intData); // 199

akirad / addMailQuote.pl

Last active March 27, 2016 02:39

This script just adds "> " to the text message from clipboard and set the result to clipboard.

	use strict;
	use warnings;
	use Win32::Clipboard;

	my $clip = Win32::Clipboard();
	my $text = $clip->GetText();
	$text =~ s/^/> /mg;
	$clip->Empty();
	$clip->Set($text);

akirad / Newton.java

Last active August 29, 2015 13:55

	// [課題]
	// 5 = -0.00003X^4 + 0.0034X^3 - 0.1257X^2 + 1.6351X + 0.000000000003 のXを求める。
	// いろいろ方法はありそうだが、メジャーな数値計算法である、ニュートン法で試してみた。
	// 具体的には、f(X) = -0.00003X^4 + 0.0034X^3 - 0.1257X^2 + 1.6351X + 0.000000000003 - 5 として、
	// f(X) = 0 となる解Xを、ニュートン法、つまり、X[n+1] = X[n] - f(X)/f'(X) をもとに、繰り返し計算を行った。
	public class Newton {
	public static void main(String[] args) {
	double x = 1; // 出発値
	double new_x;
	double EPS = 1.0e-5; // 許容誤差

akirad / testBrace.pl

Last active January 1, 2016 23:19

perlで配列を生成する際には、( )や[ ]が利用できるが、その違いに関する覚書き。[ ]は、(無名)配列を生成し、かつ、そのリファレンス(アドレス)となる。複数の配列を関数に渡す時に、受け取った側で各配列を別個に扱うため、渡す側では配列そのものではなく、各配列のリファレンスを渡すということがあるが、そんな時に、この[ ]は役に立つかも。

	use strict;
	use warnings;

	# {}は、(無名)ハッシュを生成し、かつ、そのリファレンス(アドレス)となる。
	my $ref_hash = {"a" => "A", "b" => "B", "c" => "C"};
	print($ref_hash->{"a"} . "\n"); # "A"

	# つまり、以下と同様。上のように書いた方がカッコいいか。
	my %hash = ("a" => "A", "b" => "B", "c" => "C");
	print((\%hash)->{"a"} . "\n"); # "A"

akirad / date.html

Last active December 24, 2015 00:09

An easy sample to show current date and years of Heisei(平成).

	<html>
	<head>
	<title>現在時刻</title>
	<script language="JavaScript">
	function getCurrentTime() {
	var dayArray = new Array("日","月","火","水","木","金","土");
	var dateObj = new Date();

	var year = dateObj.getYear() + 1900;
	var heisei = year - 1988;

akirad / Base.java

Created September 2, 2013 05:28

These code are easy sample(test) for static field in Java.

	package staticFieldTest;

	public abstract class Base {

	public static int staticCounter = 0;
	public int NonStaticCounter = 0;

	public void countUp(){
	staticCounter++;
	NonStaticCounter++;

akirad / getBytesSample.java

Last active December 22, 2015 02:19

A sample of using getBytes(). This shows some behaviors of getBytes() with Multi byte characters.

	import java.io.UnsupportedEncodingException;

	public class getBytesSample {

	public static void main(String[] args) {
	// Tested on Windows7.
	String str = "あいう";
	try {
	byte[] bytesSJIS = str.getBytes("Windows-31J");
	byte[] bytesUTF8 = str.getBytes("UTF-8");

akirad / ExternalClass.java

Last active December 21, 2015 15:28

Java inner class test.

	package innerClassTest;

	public class ExternalClass {
	String str = "external";

	class InnerClass {
	String str = "inner";
	}

	InnerClass createInner(){

akirad / extractRecursively.pl

Last active December 19, 2015 10:59

Specified a dir as a argument, this script extracts archive files(zip/ear/war/jar files) in the dir recursively. It means if a zip file contains another zip file, both zip files are extracted. Then, if "-d" option is specified, the original archive files are removed.

	use strict;
	use warnings;
	use Archive::Zip;
	use File::Basename;
	use Getopt::Long;

	my $DEF_OF_ARC = '(\.zip$)\|(\.jar$)\|(\.war$)\|(\.ear$)\|(\.sar$)';

	my $deleteArchiveFile;
	GetOptions(

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