Java version switcher

java_version_switcher.ps1

# In case you have different JDK versions on PC and wish to switch between them easily
# Current pattern is JAVA\d+_HOME
# So make sure you have ENV variables like JAVA17_HOME, etc.

if (-not $env:JAVA_HOME) { $env:JAVA_HOME = [Environment]::GetEnvironmentVariable('JAVA_HOME', 'User') }
Write-Host "(Current: $env:JAVA_HOME)"

# Alternative to OGV
#$javaVersion = Read-Host "Select JAVA version: "
#$javaVersion = $javaVersion.Trim()
#$selection = (ls env: | ?  name -eq "JAVA$($javaVersion)_HOME").name

$selection = (ls env: | ?  name -Match 'JAVA\d+_HOME').name | ogv -OutputMode single -Title "List of possible JAVA versions:"

Write-Host "You chose: $selection" -NoNewLine

if ($selection) {
	[Environment]::SetEnvironmentVariable('JAVA_HOME', (ls env: | ?  name -eq $selection).value, 'User')
	$env:JAVA_HOME = [Environment]::GetEnvironmentVariable('JAVA_HOME', 'User')
}