Change Java Home via PowerShell, Scoop and OpenJDK

Change-Java-Home.ps1

# You need to add %JAVA_HOME%bin to the beginning of your Path variable
$version = $args[0].trim()
$helpText = "To change to the latest OpenJDK version enter 'latest', otherwise enter the version you want to use." + [Environment]::NewLine + "Usage: Change-Java-JDK (latest|\d|-{0,2}help)"

if ($version -eq "latest") {
    $version = ""
} elseif ($version -match "^\s*-{0,2}help\s*$") {
    Write-Host $helpText
    return
} elseif (!($version -match "^\d+$")) {
    Write-Error "Invalid arguments. $helpText"
}

$newJavaPath = "$home\scoop\apps\openjdk$version\current\"

if (!(Test-Path $newJavaPath)) {
    Write-Error "Given Java JDK version ($version) is not installed. No such directory '$newJavaPath'"
} else {
    if ($version) {
        Write-Host "Changing Java JDK version to $version."
    } else {
        Write-Host "Changing Java JDK version to latest."
    }
    
    [Environment]::setEnvironmentVariable("JAVA_HOME", $newJavaPath, "User")
}