Adds server console truncation after 1000 lines of output

src/main/java/net/knarcraft/minecraftserverlauncher/userinterface/Console.java

@@ -26,6 +26,7 @@ public class Console extends KeyAdapter implements ActionListener, KeyListener {
     private final JPanel panel;
     private final ArrayList<String> commands = new ArrayList<>();
     private int commandIndex;
+    private final int maxConsoleLines = 1000;
 
     /**
      * Instantiates a new console
@@ -67,9 +68,32 @@ public class Console extends KeyAdapter implements ActionListener, KeyListener {
      * @param text <p>The string to print</p>
      */
     public void output(String text) {
+        int outputLines = this.textOutput.getLineCount();
+        if (outputLines > maxConsoleLines) {
+            truncateConsole(outputLines);
+        }
         this.textOutput.setText(this.textOutput.getText() + "\n" + text);
     }
 
+    /**
+     * Truncates the first 50 lines if the console output has reached the max limit
+     * @param outputLines <p>The currently readable lines in the console output field.</p>
+     */
+    private void truncateConsole(int outputLines) {
+        String oldText = this.textOutput.getText();
+        String[] oldTextList = oldText.split("\n");
+        for (int i = 0; i < outputLines - maxConsoleLines + 50; i++) {
+            oldTextList[i] = "";
+        }
+        StringBuilder newTextBuilder = new StringBuilder();
+        for (String line : oldTextList) {
+            if (!line.equals("")) {
+                newTextBuilder.append(line);
+            }
+        }
+        this.textOutput.setText(newTextBuilder.toString());
+    }
+
     @Override
     public void actionPerformed(ActionEvent e) {
         //Sends the command from the input to the server with the same name.