diff --git a/app/.classpath b/app/.classpath
index 72c373710..62372c610 100644
--- a/app/.classpath
+++ b/app/.classpath
@@ -1,13 +1,13 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <classpath>
 	<classpathentry kind="src" path="src"/>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.launching.macosx.MacOSXType/AdoptOpenJDK 11 [11.0.4]"/>
 	<classpathentry combineaccessrules="false" kind="src" path="/processing-core"/>
 	<classpathentry kind="lib" path="lib/jna.jar"/>
 	<classpathentry kind="lib" path="lib/jna-platform.jar"/>
 	<classpathentry exported="true" kind="lib" path="lib/ant.jar"/>
 	<classpathentry exported="true" kind="lib" path="lib/ant-launcher.jar"/>
-	<classpathentry kind="lib" path="test/lib/junit-4.8.1.jar"/>
 	<classpathentry kind="lib" path="/processing-core/apple.jar"/>
+	<classpathentry kind="lib" path="/processing4-core/library-test/junit-4.8.1.jar"/>
 	<classpathentry kind="output" path="bin"/>
 </classpath>
diff --git a/app/.settings/org.eclipse.jdt.core.prefs b/app/.settings/org.eclipse.jdt.core.prefs
index 991033770..404e1da2b 100644
--- a/app/.settings/org.eclipse.jdt.core.prefs
+++ b/app/.settings/org.eclipse.jdt.core.prefs
@@ -6,9 +6,9 @@ org.eclipse.jdt.core.compiler.annotation.nullable=org.eclipse.jdt.annotation.Nul
 org.eclipse.jdt.core.compiler.annotation.nullanalysis=disabled
 org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
 org.eclipse.jdt.core.compiler.codegen.methodParameters=do not generate
-org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=11
 org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
-org.eclipse.jdt.core.compiler.compliance=1.8
+org.eclipse.jdt.core.compiler.compliance=11
 org.eclipse.jdt.core.compiler.debug.lineNumber=generate
 org.eclipse.jdt.core.compiler.debug.localVariable=generate
 org.eclipse.jdt.core.compiler.debug.sourceFile=generate
@@ -22,6 +22,7 @@ org.eclipse.jdt.core.compiler.problem.deprecationInDeprecatedCode=disabled
 org.eclipse.jdt.core.compiler.problem.deprecationWhenOverridingDeprecatedMethod=disabled
 org.eclipse.jdt.core.compiler.problem.discouragedReference=warning
 org.eclipse.jdt.core.compiler.problem.emptyStatement=ignore
+org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
 org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
 org.eclipse.jdt.core.compiler.problem.explicitlyClosedAutoCloseable=ignore
 org.eclipse.jdt.core.compiler.problem.fallthroughCase=ignore
@@ -64,6 +65,7 @@ org.eclipse.jdt.core.compiler.problem.redundantSpecificationOfTypeArguments=igno
 org.eclipse.jdt.core.compiler.problem.redundantSuperinterface=ignore
 org.eclipse.jdt.core.compiler.problem.reportMethodCanBePotentiallyStatic=ignore
 org.eclipse.jdt.core.compiler.problem.reportMethodCanBeStatic=ignore
+org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
 org.eclipse.jdt.core.compiler.problem.specialParameterHidingField=disabled
 org.eclipse.jdt.core.compiler.problem.staticAccessReceiver=warning
 org.eclipse.jdt.core.compiler.problem.suppressOptionalErrors=disabled
@@ -93,7 +95,8 @@ org.eclipse.jdt.core.compiler.problem.unusedParameterWhenOverridingConcrete=disa
 org.eclipse.jdt.core.compiler.problem.unusedPrivateMember=warning
 org.eclipse.jdt.core.compiler.problem.unusedWarningToken=warning
 org.eclipse.jdt.core.compiler.problem.varargsArgumentNeedCast=warning
-org.eclipse.jdt.core.compiler.source=1.8
+org.eclipse.jdt.core.compiler.release=disabled
+org.eclipse.jdt.core.compiler.source=11
 org.eclipse.jdt.core.formatter.align_type_members_on_columns=false
 org.eclipse.jdt.core.formatter.alignment_for_arguments_in_allocation_expression=18
 org.eclipse.jdt.core.formatter.alignment_for_arguments_in_annotation=0
diff --git a/app/src/processing/app/syntax/JEditTextArea.java b/app/src/processing/app/syntax/JEditTextArea.java
index c3e6c617c..43b8ad5f7 100644
--- a/app/src/processing/app/syntax/JEditTextArea.java
+++ b/app/src/processing/app/syntax/JEditTextArea.java
@@ -1336,12 +1336,12 @@ public class JEditTextArea extends JComponent
    * @param startOffset The offset to apply before the text will be drawn.
    * @return The width of the input segment in pixels with fractional character widths considered.
    */
-  private int getTabbedTextWidth(Segment s, FontMetrics metrics, float x, TabExpander expander,
-      int startOffset) {
+  private int getTabbedTextWidth(Segment s, FontMetrics metrics, float x,
+                                 TabExpander expander, int startOffset) {
+    float additionalOffset =
+      getPartialPixelWidth(metrics, x, expander, startOffset) * s.length();
 
-    float additionalOffset = getPartialPixelWidth(metrics, x, expander, startOffset) * s.length();
-
-    return (int) Math.round(
+    return Math.round(
       Utilities.getTabbedTextWidth(s, metrics, x, expander, startOffset) + additionalOffset
     );
   }
@@ -1369,14 +1369,9 @@ public class JEditTextArea extends JComponent
     // See https://github.com/sampottinger/processing/issues/103
     // Requires reference not object equality check
     if (candidateMetrics != cachedPartialPixelWidthFont) {
-      float withFractional = Utilities.getTabbedTextWidth​(
-        TEST_SEGMENT,
-        candidateMetrics,
-        x,
-        expander,
-        startOffset
-      );
-
+      float withFractional =
+        Utilities.getTabbedTextWidth(TEST_SEGMENT, candidateMetrics,
+                                     x, expander, startOffset);
       int withoutFractional = (int) withFractional;
 
       partialPixelWidth = withFractional - withoutFractional;
diff --git a/app/src/processing/app/ui/Editor.java b/app/src/processing/app/ui/Editor.java
index 0e9ab769e..811b25452 100644
--- a/app/src/processing/app/ui/Editor.java
+++ b/app/src/processing/app/ui/Editor.java
@@ -459,7 +459,6 @@ public abstract class Editor extends JFrame implements RunnerListener {
       return !sketch.isReadOnly();
     }
 
-    @SuppressWarnings("unchecked")
     public boolean importData(TransferHandler.TransferSupport support) {
       int successful = 0;