java/.devcontainer/devcontainer.json

{
	"name": "Java Sample",
	"dockerFile": "Dockerfile",

	// Use 'settings' to set *default* container specific settings.json values on container create. 
	// You can edit these settings after create using File > Preferences > Settings > Remote.
	"settings": { 
		"terminal.integrated.shell.linux": "/bin/bash",
		"java.home": "/usr/lib/jvm/zulu-8-azure-amd64"
	},

	// Use 'appPort' to create a container with published ports. If the port isn't working, be sure
	// your server accepts connections from all interfaces (0.0.0.0 or '*'), not just localhost.
	// "appPort": [],

	// Uncomment the next line to run commands after the container is created.
	// "postCreateCommand": "java -version",

	// Comment out the next line to run as root
	"remoteUser": "vscode",

	// Add the IDs of extensions you want installed when the container is created in the array below.
	"extensions": [
		"ms-azuretools.vscode-azurefunctions",
		"vscjava.vscode-java-pack"
	]
}