[String]$PROG="MyApp"

[String]$MODE="DIR"

[bool]$COMPILE=$false

[String]$PACKAGE=""

[String]$PACKAGEPATH=""

function Init-App {

$Script:PACKAGE=(Select-String -Pattern 'package ' -SimpleMatch -Path "./$PROG.java").Line.replace("package ","").Replace(";","").Trim()

$Script:PACKAGEPATH=$PACKAGE.Replace(".","/")

}

function Compile-App {

if($MODE -eq "DIR") {

$COMPILE=(-Not [IO.File]::Exists("$PROG/$PACKAGEPATH/$PROG.class"))

if(-Not $COMPILE) {

$COMPILE=((Get-Item -Path "$PROG.java").LastWriteTime -gt (Get-Item -Path "$PROG/$PACKAGEPATH/$PROG.class").LastWriteTime)

}

}

if ($MODE -eq "JAR") {

$COMPILE=(-Not [IO.File]::Exists("$PROG.jar"))

if(-Not $COMPILE) {

$COMPILE=((Get-Item -Path "$PROG.java").LastWriteTime -gt (Get-Item -Path "$PROG.jar").LastWriteTime)

}

}

if($COMPILE) {

Write-Output "compiling..."

New-Item -Path "./$PROG" -ItemType Directory -Force | Out-Null

Invoke-Expression "javac -d `"./$PROG`" *.java"

if($MODE -eq "JAR") {

Write-Output "Creating JAR-File"

Set-Location "./$PROG"

[String]$manifestContent="Manifest-Version: 1.0"

$manifestContent += [Environment]::NewLine

$manifestContent += "Main-Class: $PACKAGE.$PROG"

$Utf8NoBomEncoding = New-Object System.Text.UTF8Encoding $False

[IO.File]::WriteAllLines("$PROG/$PACKAGEPATH/$PROG.mf", $manifestContent, $Utf8NoBomEncoding)

Invoke-Expression "jar cmf `"$PACKAGEPATH/$PROG.mf`" `"../$PROG.jar`" $PACKAGEPATH/*.class ../$PROG.java"

Set-Location ..

Remove-Item -Force -Recurse "./$PROG/"

}

}

}

function Execute-App {

Param ([System.Array]$commandlineArgs)

if($MODE -eq "JAR") {

Write-Output "executing jar..."

Invoke-Expression "java -jar `"$PROG.jar`" `"$commandlineArgs`""

}

if($MODE -eq "DIR") {

Write-Output "executing class..."

Invoke-Expression "java -cp `"./$PROG`" `"$PACKAGE.$PROG`" `"$commandlineArgs`""

}

}

function Start-App() {

Param ([System.Array]$commandlineArgs)

Init-App

Compile-App

Execute-App -commandlineArgs $commandlineArgs

}