error trap to inform players wtf went wrong

src/net/torvald/terrarum/GameCrashHandler.kt

@@ -0,0 +1,66 @@
+package net.torvald.terrarum
+
+import java.awt.BorderLayout
+import java.awt.Color
+import java.awt.Dimension
+import java.awt.Font
+import java.awt.Font.BOLD
+import java.awt.Font.PLAIN
+import java.io.OutputStream
+import java.io.PrintStream
+import javax.swing.*
+
+/**
+ * Created by minjaesong on 2021-09-18.
+ */
+class GameCrashHandler(e: Throwable) : JFrame() {
+
+    val textArea = JTextArea()
+
+    private val outputStream = object : OutputStream() {
+        override fun write(p0: Int) {
+            textArea.append("${p0.toChar()}")
+        }
+    }
+
+    private val printStream = object : PrintStream(outputStream) {}
+
+    init {
+        val border = JPanel()
+        border.layout = BorderLayout(18,18)
+        border.isVisible = true
+        border.background = Color(63,79,93)
+
+
+        val title = JLabel("Help! A blackhole ate my game!")
+        title.font = Font("SansSerif", BOLD, 18)
+        title.foreground = Color.WHITE
+        title.isVisible = true
+        title.horizontalAlignment = SwingConstants.CENTER
+        border.add(title, BorderLayout.NORTH)
+
+
+        textArea.font = Font("Monospaced", PLAIN, 14)
+        textArea.isVisible = true
+        textArea.isEditable = false
+        border.add(JScrollPane(textArea), BorderLayout.CENTER)
+
+
+        this.layout = BorderLayout(32,32)
+        this.size = Dimension(1280, 720)
+        this.isVisible = true
+        this.defaultCloseOperation = EXIT_ON_CLOSE
+        this.contentPane.background = Color(63,79,93)
+        this.add(JLabel(), BorderLayout.EAST)
+        this.add(JLabel(), BorderLayout.WEST)
+        this.add(JLabel(), BorderLayout.SOUTH)
+        this.add(JLabel(), BorderLayout.NORTH)
+        this.add(border, BorderLayout.CENTER)
+        this.title = TerrarumAppConfiguration.GAME_NAME
+
+
+        e.printStackTrace(printStream)
+        e.printStackTrace()
+    }
+
+}