Fix detection of invalid values in FormattedTextField.

core/src/main/java/com/github/weisj/darklaf/ui/text/DarkFormattedTextFieldUI.java

@@ -26,13 +26,15 @@ package com.github.weisj.darklaf.ui.text;
 
 import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
-import java.text.ParseException;
+import java.text.Format;
+import java.text.ParsePosition;
 
 import javax.swing.*;
 import javax.swing.event.DocumentEvent;
 import javax.swing.event.DocumentListener;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.text.Document;
+import javax.swing.text.InternationalFormatter;
 
 import com.github.weisj.darklaf.util.PropertyKey;
 
@@ -86,12 +88,12 @@ public class DarkFormattedTextFieldUI extends DarkTextFieldUI implements Propert
 
     @Override
     public void insertUpdate(final DocumentEvent e) {
-        update();
+        SwingUtilities.invokeLater(this::update);
     }
 
     @Override
     public void removeUpdate(final DocumentEvent e) {
-        update();
+        SwingUtilities.invokeLater(this::update);
     }
 
     @Override
@@ -99,11 +101,19 @@ public class DarkFormattedTextFieldUI extends DarkTextFieldUI implements Propert
 
     protected void update() {
         if (textField == null) return;
-        try {
-            textField.getFormatter().stringToValue(textField.getText());
-            textField.putClientProperty("JTextComponent.hasError", false);
-        } catch (ParseException e) {
-            textField.putClientProperty("JTextComponent.hasError", true);
+        textField.putClientProperty(DarkTextUI.KEY_HAS_ERROR, !isInputValid(textField));
+    }
+
+    protected boolean isInputValid(final JFormattedTextField textField) {
+        String value = textField.getText();
+        JFormattedTextField.AbstractFormatter formatter = textField.getFormatter();
+        if (formatter instanceof InternationalFormatter) {
+            Format format = ((InternationalFormatter) formatter).getFormat();
+            ParsePosition position = new ParsePosition(0);
+            format.parseObject(value, position);
+            return position.getIndex() == value.length();
+        } else {
+            return textField.isEditValid();
         }
     }
 }

core/src/test/java/ui/text/FormattedTextFieldDemo.java

@@ -24,6 +24,8 @@
  */
 package ui.text;
 
+import java.text.NumberFormat;
+
 import javax.swing.*;
 
 import ui.ComponentDemo;
@@ -36,7 +38,14 @@ public class FormattedTextFieldDemo extends TextFieldDemo {
 
     @Override
     protected JTextField createTextField() {
-        return new JFormattedTextField("Demo FormattedTextField");
+        JFormattedTextField textField = new JFormattedTextField(NumberFormat.getIntegerInstance());
+        textField.setValue(1234);
+        return textField;
+    }
+
+    @Override
+    protected String getDefaultText() {
+        return "Only accepts numbers";
     }
 
     @Override

core/src/test/java/ui/text/TextFieldDemo.java

@@ -45,7 +45,7 @@ public class TextFieldDemo implements ComponentDemo {
     @Override
     public JComponent createComponent() {
         JTextField textField = createTextField();
-        textField.putClientProperty(DarkTextUI.KEY_DEFAULT_TEXT, "Default Text");
+        textField.putClientProperty(DarkTextUI.KEY_DEFAULT_TEXT, getDefaultText());
         // textField.setFont(new Font("Roboto", Font.PLAIN, 13));
         DemoPanel panel = new DemoPanel(textField);
 
@@ -104,6 +104,10 @@ public class TextFieldDemo implements ComponentDemo {
         return panel;
     }
 
+    protected String getDefaultText() {
+        return "Default Text";
+    }
+
     protected JTextField createTextField() {
         return new JTextField("Demo TextField");
     }