Convert Groovy classes to Java classes

Author: emmanue1

api/src/main/java/org/jd/gui/spi/PreferencesPanel.java

@@ -7,6 +7,7 @@
 
 package org.jd.gui.spi;
 
+import javax.swing.*;
 import java.awt.*;
 import java.util.Map;
 
@@ -15,6 +16,8 @@ public interface PreferencesPanel {
 
     String getPreferencesPanelTitle();
 
+    JComponent getPanel();
+
     void init(Color errorBackgroundColor);
 
     boolean isActivated();

app/build.gradle

@@ -1,10 +1,7 @@
-apply plugin: 'groovy'
+apply plugin: 'java'
 
 dependencies {
-	compile 'org.codehaus.groovy:groovy:2.5.6'
-    compile 'org.codehaus.groovy:groovy-swing:2.5.6'
-    compile 'org.codehaus.groovy:groovy-xml:2.5.6'
-    provided 'com.yuvimasory:orange-extensions:1.3.0'
+    provided 'com.yuvimasory:orange-extensions:1.3.0'   // OSX support
     compile project(':api')
     runtime project(':services')
 }