diff --git a/src/main/kotlin/extensions/wu/seal/PropertyPrefixSupport.kt b/src/main/kotlin/extensions/wu/seal/PropertyPrefixSupport.kt
index 1a41fa53..8286b81a 100644
--- a/src/main/kotlin/extensions/wu/seal/PropertyPrefixSupport.kt
+++ b/src/main/kotlin/extensions/wu/seal/PropertyPrefixSupport.kt
@@ -57,7 +57,7 @@ object PropertyPrefixSupport : Extension() {
 
 
     override fun intercept(kotlinDataClass: KotlinDataClass): KotlinDataClass {
-        return if (getConfig(prefixKeyEnable).toBoolean()) {
+        return if (getConfig(prefixKeyEnable).toBoolean() && getConfig(prefixKey).isNotEmpty()) {
             val originProperties = kotlinDataClass.properties
             val newProperties = originProperties.map {
                 val prefix = getConfig(prefixKey)
diff --git a/src/main/kotlin/extensions/wu/seal/PropertySuffixSupport.kt b/src/main/kotlin/extensions/wu/seal/PropertySuffixSupport.kt
index a3b0c0f0..87c76d30 100644
--- a/src/main/kotlin/extensions/wu/seal/PropertySuffixSupport.kt
+++ b/src/main/kotlin/extensions/wu/seal/PropertySuffixSupport.kt
@@ -22,6 +22,7 @@ object PropertySuffixSupport : Extension() {
             addFocusListener(object : FocusListener {
                 override fun focusGained(e: FocusEvent?) {
                 }
+
                 override fun focusLost(e: FocusEvent?) {
                     if (getConfig(suffixKeyEnable).toBoolean()) {
                         setConfig(suffixKey, text)
@@ -46,17 +47,17 @@ object PropertySuffixSupport : Extension() {
                 suffixJField()
             }
         }.apply {
-            border = JBEmptyBorder(6,0,0,0)
+            border = JBEmptyBorder(6, 0, 0, 0)
         }
     }
 
 
     override fun intercept(kotlinDataClass: KotlinDataClass): KotlinDataClass {
-        return if (getConfig(suffixKeyEnable).toBoolean()) {
+        return if (getConfig(suffixKeyEnable).toBoolean() && getConfig(suffixKey).isNotEmpty()) {
             val originProperties = kotlinDataClass.properties
             val newProperties = originProperties.map {
                 val suffix = getConfig(suffixKey)
-                val newName = it.name + suffix.first().toUpperCase() +suffix.substring(1)
+                val newName = it.name + suffix.first().toUpperCase() + suffix.substring(1)
                 it.copy(name = newName)
             }
             kotlinDataClass.copy(properties = newProperties)
diff --git a/src/main/kotlin/wu/seal/jsontokotlin/ui/ExtensionsTab.kt b/src/main/kotlin/wu/seal/jsontokotlin/ui/ExtensionsTab.kt
index fec1b04a..8b07532b 100644
--- a/src/main/kotlin/wu/seal/jsontokotlin/ui/ExtensionsTab.kt
+++ b/src/main/kotlin/wu/seal/jsontokotlin/ui/ExtensionsTab.kt
@@ -18,7 +18,6 @@ class ExtensionsTab(layout: LayoutManager?, isDoubleBuffered: Boolean) : JPanel(
             ExtensionsCollector.extensions.forEach {
                 row(separated = false) {
                     it.createUI().apply {
-                        background  = Color(225,225,225)
                         preferredSize = JBDimension(500, 0)
                     }.invoke()
                 }
diff --git a/src/main/kotlin/wu/seal/jsontokotlin/ui/JsonInputDialog.kt b/src/main/kotlin/wu/seal/jsontokotlin/ui/JsonInputDialog.kt
index d78baff8..f2445eb5 100644
--- a/src/main/kotlin/wu/seal/jsontokotlin/ui/JsonInputDialog.kt
+++ b/src/main/kotlin/wu/seal/jsontokotlin/ui/JsonInputDialog.kt
@@ -128,7 +128,7 @@ class JsonInputDialog(classsName: String, private val project: Project) : Messag
 
     private fun createJsonContentEditor(): Editor {
         val editorFactory = EditorFactory.getInstance()
-        val document = editorFactory.createDocument("").apply {  }
+        val document = editorFactory.createDocument("").apply { }
         document.setReadOnly(false)
         document.addDocumentListener(object : com.intellij.openapi.editor.event.DocumentListener {
             override fun documentChanged(event: com.intellij.openapi.editor.event.DocumentEvent?) = revalidate()
@@ -142,7 +142,9 @@ class JsonInputDialog(classsName: String, private val project: Project) : Messag
         component.preferredSize = Dimension(640, 480)
         component.autoscrolls = true
 
-        editor.contentComponent.componentPopupMenu = JPopupMenu().apply {
+        val contentComponent = editor.contentComponent
+        contentComponent.isFocusable = true
+        contentComponent.componentPopupMenu = JPopupMenu().apply {
             add(createPasteFromClipboardMenuItem())
             add(createRetrieveContentFromHttpURLMenuItem())
             add(createLoadFromLocalFileMenu())
@@ -210,7 +212,7 @@ class JsonInputDialog(classsName: String, private val project: Project) : Messag
     override fun getInputString(): String = if (exitCode == 0) jsonContentEditor.document.text.trim() else ""
 
     override fun getPreferredFocusedComponent(): JComponent? {
-        return if (this.myField.text?.isEmpty() != false) {
+        return if (this.myField.text.isNullOrEmpty()) {
             this.myField
         } else {
             jsonContentEditor.contentComponent