Fixed incorrect locale generation

Author: pasabanov

src/main/java/com/borviz/boruvkavisualizer/gui/lib/DoubleNumberTextField.java

@@ -29,7 +29,7 @@ public Converter(int precision) {
 		}
 		@Override
 		public String toString(Double d) {
-			return String.format(new Locale("en_EN"), "%." + precision + "f", d).replaceAll("([.,]\\d+?)0*$", "$1");
+			return String.format(Locale.of("en"), "%." + precision + "f", d).replaceAll("([.,]\\d+?)0*$", "$1");
 		}
 		@Override
 		public Double fromString(String s) {

src/main/java/com/borviz/boruvkavisualizer/gui/prog/BorVizController.java

@@ -88,7 +88,7 @@ else if (period > MAX_STEP_SPEED)
 			public void changed(ObservableValue<? extends String> observable, String oldValue, String newValue) {
 				speedTextField.setText(
 						String.format(
-								new Locale("en_EN"),
+								Locale.of("en"),
 								"%." + PRECISION + "f",
 								Double.parseDouble(newValue)
 						).replaceAll("([.,]\\d+?)0*$", "$1")