@ Today I meet an interesting issue about String. First, let’s guess what’s the result of the code below: 1234567@Testpublic void testConcat() { String a = null; String b = null; String c = a
安装Jenkins（参考） @ 将key添加到系统中 wget -q -O - https://pkg.jenkins.io/debian-stable/jenkins.io.key | sudo apt-key add - @ 将下面一行添加到/etc/apt/sources.list中： deb https://pkg.jenkins.io/debian-stable binary/ @
Keycloak配置 @ 登录Keycloak后台http://localhost:8080/auth/admin/master/console/#/realms/master @ Add Realm，Name为"abc" @ 创建Client，Name为"grafana"，grafana默认端口是3000, 因此Root URL填写http://loca
@ 更新资源 $ sudo apt-get update @ 安装docker $ sudo apt-get install docker.io @ 启动docker服务 $ sudo service docker start @ 将当前用户添加到docker组（需要注销或重启） $ sudo usermod -aG docker $USER @ 更改docker image镜像为国内镜像 $ s