Powershell script not starting java app correctly - powershell

Question

Hello guys i am trying to create a powershell script to run my Java application with parameters. App starts and seems to be running but but i'm not getting expected output. I runned the code with params using Intelij and it was ok so the problem lies with powershell script not java code. Can you guys check it out maybe you can spot a mistake?
param
(
[Parameter(Mandatory = $true)][string] $directory,
[Parameter(Mandatory = $true)][ValidateSet("bfs","dfs","astr")][string] $algorithm,
[Parameter(Mandatory = $false)][string] $jarPath = "C:\Users\user\Desktop\Repozytoria\FifteenPuzzle\target\Fifteenpuzzle-1.0-SNAPSHOT-jar-with-dependencies.jar"
)
$fileRegex ="[a-zA-Z0-9]+_[0-9]+_[0-9]+.txt";
$files = Get-ChildItem $directory | Where-Object {$_.Name -match $fileRegex} | select FullName
$strategies = #("RDUL","RDLU","DRUL","DRLU","LUDR","LURD","ULDR","ULRD");
$heuristcs = #("hamm","manh");
if($algorithm -eq "astr")
{
foreach($heuristc in $heuristcs)
{
foreach($file in $files)
{
$app = Start-Process java -ArgumentList "'-jar',$jarPath, $file, $algorithm, $heuristic" -PassThru
$app.PriorityClass = "High"
$app.WaitForExit()
}
}
}
else
{
foreach($strategy in $strategies)
{
foreach($file in $files)
{
#$file
$app = Start-Process java -ArgumentList "'-jar',$jarPath, $file, $algorithm, $strategy" -PassThru
$app.WaitForExit()
}
}
}