diff --git a/java/src/processing/mode/java/preproc/PdeParseTreeListener.java b/java/src/processing/mode/java/preproc/PdeParseTreeListener.java
index 163233a1d..f42acfe74 100644
--- a/java/src/processing/mode/java/preproc/PdeParseTreeListener.java
+++ b/java/src/processing/mode/java/preproc/PdeParseTreeListener.java
@@ -86,6 +86,7 @@ public class PdeParseTreeListener extends ProcessingBaseListener {
   private boolean sizeIsFullscreen = false;
   private boolean noSmoothRequiresRewrite = false;
   private boolean smoothRequiresRewrite = false;
+  private boolean userImportingManually = false;
   private RewriteResult headerResult;
   private RewriteResult footerResult;
 
@@ -443,6 +444,10 @@ public class PdeParseTreeListener extends ProcessingBaseListener {
 
     foundImports.add(ImportStatement.parse(importStringNoSemi));
 
+    if (importStringNoSemi.startsWith("processing.core.")) {
+      userImportingManually = true;
+    }
+
     delete(ctx.start, ctx.stop);
   }
 
@@ -498,7 +503,7 @@ public class PdeParseTreeListener extends ProcessingBaseListener {
    * @param ctx ANTLR context for the sketch.
    */
   public void exitStaticProcessingSketch(ProcessingParser.StaticProcessingSketchContext ctx) {
-    mode = Mode.STATIC;
+    mode = foundMain ? Mode.JAVA : Mode.STATIC;
   }
 
   /**
@@ -1072,10 +1077,16 @@ public class PdeParseTreeListener extends ProcessingBaseListener {
   protected void writeImports(PrintWriterWithEditGen headerWriter,
         RewriteResultBuilder resultBuilder) {
 
-    writeImportList(headerWriter, coreImports, resultBuilder);
+    if (!userImportingManually) {
+      writeImportList(headerWriter, coreImports, resultBuilder);
+    }
+
     writeImportList(headerWriter, codeFolderImports, resultBuilder);
     writeImportList(headerWriter, foundImports, resultBuilder);
-    writeImportList(headerWriter, defaultImports, resultBuilder);
+
+    if (!userImportingManually) {
+      writeImportList(headerWriter, defaultImports, resultBuilder);
+    }
   }
 
   /**
diff --git a/java/test/processing/mode/java/ParserTests.java b/java/test/processing/mode/java/ParserTests.java
index c38a2b820..1e9e28466 100644
--- a/java/test/processing/mode/java/ParserTests.java
+++ b/java/test/processing/mode/java/ParserTests.java
@@ -448,4 +448,9 @@ public class ParserTests {
     expectGood("staticclass");
   }
 
+  @Test
+  public void testCustomRootClass() {
+    expectGood("customrootclass");
+  }
+
 }
diff --git a/java/test/resources/customrootclass.expected b/java/test/resources/customrootclass.expected
new file mode 100644
index 000000000..a8b391206
--- /dev/null
+++ b/java/test/resources/customrootclass.expected
@@ -0,0 +1,23 @@
+import processing.core.*;
+import processing.data.*;
+import processing.event.*;
+import processing.opengl.*;
+
+import java.util.HashMap;
+import java.util.ArrayList;
+import java.io.File;
+import java.io.BufferedReader;
+import java.io.PrintWriter;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.IOException;
+
+public class CustomObj extends PApplet {
+
+public static void main(String[] argv) {
+
+    System.out.println("here");
+
+}
+
+}
diff --git a/java/test/resources/customrootclass.pde b/java/test/resources/customrootclass.pde
new file mode 100644
index 000000000..a8b391206
--- /dev/null
+++ b/java/test/resources/customrootclass.pde
@@ -0,0 +1,23 @@
+import processing.core.*;
+import processing.data.*;
+import processing.event.*;
+import processing.opengl.*;
+
+import java.util.HashMap;
+import java.util.ArrayList;
+import java.io.File;
+import java.io.BufferedReader;
+import java.io.PrintWriter;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.IOException;
+
+public class CustomObj extends PApplet {
+
+public static void main(String[] argv) {
+
+    System.out.println("here");
+
+}
+
+}