Koichi Sakata jyukutyo

Koichi is a JVM sustaining engineer at @oracle, an OpenJDK committer, and the founder of KanJava, a Japanese JUG.

jyukutyo / powerpointfontsetting.xml

Created December 2, 2019 03:36

~/Library/Group\ Containers/UBF8T346G9.Office/User\ Content.localized/Themes.localized/Theme\ Fonts

	<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
	<a:fontScheme xmlns:a="http://schemas.openxmlformats.org/drawingml/2006/main" name="jyukutyo">
	<a:majorFont>
	<a:latin typeface="Helvetica"/>
	<a:ea typeface="Meiryo"/>
	<a:cs typeface=""/>
	</a:majorFont>
	<a:minorFont>
	<a:latin typeface="Helvetica"/>
	<a:ea typeface="Meiryo"/>

jyukutyo / Temp.java

Created August 31, 2019 22:08

Bytecode representation of numerical values

	public class Temp {
	public static void main(String[] args) {
	System.out.println(1);
	System.out.println(127);
	System.out.println(1000);
	System.out.println(10000000);
	System.out.println(100000000000000000l);
	System.out.println(100000000000000000d);
	}
	}

jyukutyo / Emacs.keylayout

Created June 24, 2019 07:38

~/Library/Keyboard Layoutsに配置する

	<?xml version="1.0" encoding="UTF-8"?>
	<!DOCTYPE keyboard PUBLIC "" "file://localhost/System/Library/DTDs/KeyboardLayout.dtd">
	<!--Created by Ukelele version 2.2.8 on 2015-04-03 at 16:32 (GMT+9)-->
	<!--Last edited by Ukelele version 2.2.8 on 2015-04-03 at 16:35 (GMT+9)-->
	<keyboard group="0" id="4139" name="Emacs_beats_vi" maxout="1">
	<layouts>
	<layout first="0" last="17" modifiers="f4" mapSet="16c"/>
	<layout first="18" last="18" modifiers="f4" mapSet="984"/>
	<layout first="21" last="23" modifiers="f4" mapSet="984"/>
	<layout first="30" last="30" modifiers="f4" mapSet="984"/>

jyukutyo / gist:84efbb9c06cb0ba6e88fc25a89eb0bfb

Created January 22, 2019 08:15

Prime Numbers

	public List<Integer> primeNumbersTill(int n) {
	return IntStream.rangeClosed(2, n)
	.filter(x -> isPrime(x))
	.boxed()
	.collect(Collectors.toList());
	}

	private boolean isPrime(int number) {
	return IntStream.rangeClosed(2, (int) (Math.sqrt(number)))
	.allMatch(n -> number % n != 0);

jyukutyo / CMakeLists.txt

Last active May 13, 2022 17:11

Build OpenJDK on CLion

	cmake_minimum_required(VERSION 3.7)
	project(hotspot)
	include_directories(
	src/hotspot/cpu
	src/hotspot/os
	src/hotspot/os_cpu
	src/hotspot/share
	src/hotspot/share/precompiled
	src/hotspot/share/include
	src/java.base/unix/native/include

jyukutyo / policy.json

Created December 4, 2018 07:25

AWS S3で特定のバケットのみアクセスを許可する

	{
	"Version": "2012-10-17",
	"Statement": [
	{
	"Sid": "AllowGroupToSeeBucketListInTheConsole",
	"Action": [
	"s3:ListAllMyBuckets"
	],
	"Effect": "Allow",
	"Resource": [

jyukutyo / IntelliJOptionProblem.keylayout

Created November 21, 2018 04:46

Macの入力ソース。MacのIntelliJ IDEAでoptionを含んだショートカットで特殊文字を入力させない。mv ~/IntelliJOptionProblem.keylayout ~/Library/Keyboard\ Layouts/

	<?xml version="1.0" encoding="UTF-8"?>
	<!DOCTYPE keyboard PUBLIC "" "file://localhost/System/Library/DTDs/KeyboardLayout.dtd">
	<!--Created by Ukelele version 2.2.8 on 2015-04-03 at 16:32 (GMT+9)-->
	<!--Last edited by Ukelele version 2.2.8 on 2015-04-03 at 16:35 (GMT+9)-->
	<keyboard group="0" id="4139" name="Emacs_beats_vi" maxout="1">
	<layouts>
	<layout first="0" last="17" modifiers="f4" mapSet="16c"/>
	<layout first="18" last="18" modifiers="f4" mapSet="984"/>
	<layout first="21" last="23" modifiers="f4" mapSet="984"/>
	<layout first="30" last="30" modifiers="f4" mapSet="984"/>

jyukutyo / CondySample.java

Created August 30, 2018 06:22

use Constant Dynamic from Byte Buddy

	package com.sakatakoichi;

	import java.nio.file.Paths;

	import net.bytebuddy.ByteBuddy;
	import net.bytebuddy.dynamic.DynamicType;
	import net.bytebuddy.dynamic.loading.ClassLoadingStrategy;
	import net.bytebuddy.implementation.FixedValue;
	import static net.bytebuddy.matcher.ElementMatchers.isDeclaredBy;
	import net.bytebuddy.utility.JavaConstant;

jyukutyo / gist:cc92c5269bffdc45e6ad2be260e55175

Created April 13, 2018 02:20

run graal

	java
	--module-path=/Users/jyukutyo/code/graal/sdk/mxbuild/modules/org.graalvm.graal_sdk:/Users/jyukutyo/code/graal/truffle/mxbuild/modules/com.oracle.truffle.truffle_api.jar
	--upgrade-module-path=/Users/jyukutyo/code/graal/compiler/mxbuild/modules/jdk.internal.vm.compiler
	-XX:+UnlockExperimentalVMOptions
	-XX:+EnableJVMCI
	-XX:+UseJVMCICompiler
	-XX:-TieredCompilation
	-XX:+PrintCompilation
	-XX:CompileOnly=IGV::average
	-XX:CompileCommand=quiet

jyukutyo / gist:c6a73cb4374fecad596589417a4d7842

Created October 11, 2017 22:38

DNSレコード設定確認

dig @8.8.8.8 example.com MX