diff --git a/CHANGELOG.md b/CHANGELOG.md
index cf6f3fc3..efcfcac3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,7 @@ FlatLaf Change Log
 - Replaced prefix `@@` with `$` in `.properties` files.
 - Fixed link color (in HTML text) and separator color in IntelliJ platform
   themes.
+- Use logging instead of printing errors to `System.err`.
 
 
 ## 0.22
diff --git a/flatlaf-core/src/main/java/com/formdev/flatlaf/FlatLaf.java b/flatlaf-core/src/main/java/com/formdev/flatlaf/FlatLaf.java
index b93cb7d2..59fece80 100644
--- a/flatlaf-core/src/main/java/com/formdev/flatlaf/FlatLaf.java
+++ b/flatlaf-core/src/main/java/com/formdev/flatlaf/FlatLaf.java
@@ -30,6 +30,8 @@ import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
 import java.util.List;
 import java.util.function.Consumer;
+import java.util.logging.Level;
+import java.util.logging.Logger;
 import javax.swing.AbstractButton;
 import javax.swing.JLabel;
 import javax.swing.JTabbedPane;
@@ -55,6 +57,8 @@ import com.formdev.flatlaf.util.UIScale;
 public abstract class FlatLaf
 	extends BasicLookAndFeel
 {
+	static final Logger LOG = Logger.getLogger( FlatLaf.class.getName() );
+
 	private BasicLookAndFeel base;
 
 	private String desktopPropertyName;
@@ -67,11 +71,11 @@ public abstract class FlatLaf
 
 	public static boolean install( LookAndFeel newLookAndFeel ) {
 		try {
-		    UIManager.setLookAndFeel( newLookAndFeel );
-		    return true;
+			UIManager.setLookAndFeel( newLookAndFeel );
+			return true;
 		} catch( Exception ex ) {
-		    System.err.println( "Failed to initialize look and feel " + newLookAndFeel.getClass().getName() );
-		    return false;
+			LOG.log( Level.SEVERE, "FlatLaf: Failed to initialize look and feel '" + newLookAndFeel.getClass().getName() + "'.", ex );
+			return false;
 		}
 	}
 
@@ -182,10 +186,11 @@ public abstract class FlatLaf
 		if( base == null ) {
 			if( SystemInfo.IS_MAC ) {
 				// use Mac Aqua LaF as base
+				String aquaLafClassName = "com.apple.laf.AquaLookAndFeel";
 				try {
-					base = (BasicLookAndFeel) Class.forName( "com.apple.laf.AquaLookAndFeel" ).newInstance();
+					base = (BasicLookAndFeel) Class.forName( aquaLafClassName ).newInstance();
 				} catch( Exception ex ) {
-					ex.printStackTrace();
+					LOG.log( Level.SEVERE, "FlatLaf: Failed to initialize base look and feel '" + aquaLafClassName + "'.", ex );
 					throw new IllegalStateException();
 				}
 			} else
@@ -332,9 +337,9 @@ public abstract class FlatLaf
 
 	private static void reSetLookAndFeel() {
 		EventQueue.invokeLater( () -> {
+			LookAndFeel lookAndFeel = UIManager.getLookAndFeel();
 			try {
 				// re-set current LaF
-				LookAndFeel lookAndFeel = UIManager.getLookAndFeel();
 				UIManager.setLookAndFeel( lookAndFeel );
 
 				// must fire property change events ourself because old and new LaF are the same
@@ -345,7 +350,7 @@ public abstract class FlatLaf
 				// update UI
 				updateUI();
 			} catch( UnsupportedLookAndFeelException ex ) {
-				ex.printStackTrace();
+				LOG.log( Level.SEVERE, "FlatLaf: Failed to reinitialize look and feel '" + lookAndFeel.getClass().getName() + "'.", ex );
 			}
 		} );
 	}
diff --git a/flatlaf-core/src/main/java/com/formdev/flatlaf/IntelliJTheme.java b/flatlaf-core/src/main/java/com/formdev/flatlaf/IntelliJTheme.java
index cd368207..c87ec78b 100644
--- a/flatlaf-core/src/main/java/com/formdev/flatlaf/IntelliJTheme.java
+++ b/flatlaf-core/src/main/java/com/formdev/flatlaf/IntelliJTheme.java
@@ -29,6 +29,7 @@ import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
+import java.util.logging.Level;
 import javax.swing.UIDefaults;
 import javax.swing.plaf.ColorUIResource;
 import com.formdev.flatlaf.json.Json;
@@ -72,8 +73,7 @@ public class IntelliJTheme
 		try {
 		    return FlatLaf.install( createLaf( in ) );
 		} catch( Exception ex ) {
-		    System.err.println( "Failed to load IntelliJ theme" );
-		    ex.printStackTrace();
+			FlatLaf.LOG.log( Level.SEVERE, "FlatLaf: Failed to load IntelliJ theme", ex );
 		    return false;
 		}
 	}
diff --git a/flatlaf-core/src/main/java/com/formdev/flatlaf/LinuxFontPolicy.java b/flatlaf-core/src/main/java/com/formdev/flatlaf/LinuxFontPolicy.java
index d31c82ed..cee1e295 100644
--- a/flatlaf-core/src/main/java/com/formdev/flatlaf/LinuxFontPolicy.java
+++ b/flatlaf-core/src/main/java/com/formdev/flatlaf/LinuxFontPolicy.java
@@ -27,6 +27,7 @@ import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 import java.util.StringTokenizer;
+import java.util.logging.Level;
 import javax.swing.text.StyleContext;
 import com.formdev.flatlaf.util.StringUtils;
 import com.formdev.flatlaf.util.SystemInfo;
@@ -161,7 +162,7 @@ class LinuxFontPolicy
 				if( "1".equals( strs.get( 5 ) ) )
 					style |= Font.ITALIC;
 			} catch( RuntimeException ex ) {
-				ex.printStackTrace();
+				FlatLaf.LOG.log( Level.CONFIG, "FlatLaf: Failed to parse 'font=" + generalFont + "'.", ex );
 			}
 		}
 
@@ -175,7 +176,7 @@ class LinuxFontPolicy
 				if( dpi < 50 )
 					dpi = 50;
 			} catch( NumberFormatException ex ) {
-				ex.printStackTrace();
+				FlatLaf.LOG.log( Level.CONFIG, "FlatLaf: Failed to parse 'forceFontDPI=" + forceFontDPI + "'.", ex );
 			}
 		}
 
@@ -214,7 +215,7 @@ class LinuxFontPolicy
 			while( (line = reader.readLine()) != null )
 				lines.add( line );
 		} catch( IOException ex ) {
-			ex.printStackTrace();
+			FlatLaf.LOG.log( Level.CONFIG, "FlatLaf: Failed to read '" + filename + "'.", ex );
 		}
 		return lines;
 	}
diff --git a/flatlaf-core/src/main/java/com/formdev/flatlaf/UIDefaultsLoader.java b/flatlaf-core/src/main/java/com/formdev/flatlaf/UIDefaultsLoader.java
index 493ab0af..d98150ae 100644
--- a/flatlaf-core/src/main/java/com/formdev/flatlaf/UIDefaultsLoader.java
+++ b/flatlaf-core/src/main/java/com/formdev/flatlaf/UIDefaultsLoader.java
@@ -30,6 +30,7 @@ import java.util.Map;
 import java.util.Properties;
 import java.util.ServiceLoader;
 import java.util.function.Function;
+import java.util.logging.Level;
 import javax.swing.UIDefaults;
 import javax.swing.UIDefaults.ActiveValue;
 import javax.swing.UIDefaults.LazyValue;
@@ -173,13 +174,12 @@ class UIDefaultsLoader
 				}
 			}
 		} catch( IOException ex ) {
-			ex.printStackTrace();
+			FlatLaf.LOG.log( Level.SEVERE, "FlatLaf: Failed to load properties files.", ex );
 		}
 	}
 
 	static void logParseError( String key, String value, RuntimeException ex ) {
-		System.err.println( "FlatLaf: Failed to parse: '" + key + '=' + value + '\'' );
-		System.err.println( "    " + ex.getMessage() );
+		FlatLaf.LOG.log( Level.SEVERE, "FlatLaf: Failed to parse: '" + key + '=' + value + '\'', ex );
 	}
 
 	private static String resolveValue( Properties properties, String value ) {
@@ -190,7 +190,7 @@ class UIDefaultsLoader
 
 		// for compatibility
 		if( value.startsWith( REF_PREFIX ) ) {
-			System.err.println( "FlatLaf: Usage of '@@' in .properties files is deprecated. Use '$' instead." );
+			FlatLaf.LOG.log( Level.WARNING, "FlatLaf: Usage of '@@' in .properties files is deprecated. Use '$' instead." );
 			value = value.substring( REF_PREFIX.length() );
 		}
 
@@ -318,7 +318,7 @@ class UIDefaultsLoader
 			try {
 				return findClass( value, addonClassLoaders ).newInstance();
 			} catch( InstantiationException | IllegalAccessException | ClassNotFoundException ex ) {
-				ex.printStackTrace();
+				FlatLaf.LOG.log( Level.SEVERE, "FlatLaf: Failed to instantiate '" + value + "'.", ex );
 				return null;
 			}
 		};
@@ -329,7 +329,7 @@ class UIDefaultsLoader
 			try {
 				return findClass( value, addonClassLoaders );
 			} catch( ClassNotFoundException ex ) {
-				ex.printStackTrace();
+				FlatLaf.LOG.log( Level.SEVERE, "FlatLaf: Failed to find class '" + value + "'.", ex );
 				return null;
 			}
 		};
diff --git a/flatlaf-core/src/main/java/com/formdev/flatlaf/util/JavaCompatibility.java b/flatlaf-core/src/main/java/com/formdev/flatlaf/util/JavaCompatibility.java
index f927297c..7e784af7 100644
--- a/flatlaf-core/src/main/java/com/formdev/flatlaf/util/JavaCompatibility.java
+++ b/flatlaf-core/src/main/java/com/formdev/flatlaf/util/JavaCompatibility.java
@@ -20,7 +20,10 @@ import java.awt.Graphics;
 import java.awt.Graphics2D;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
+import java.util.logging.Level;
+import java.util.logging.Logger;
 import javax.swing.JComponent;
+import com.formdev.flatlaf.FlatLaf;
 
 /**
  * Provides Java version compatibility methods.
@@ -52,7 +55,7 @@ public class JavaCompatibility
 						? new Class[] { JComponent.class, Graphics2D.class, String.class, int.class, float.class, float.class }
 						: new Class[] { JComponent.class, Graphics.class, String.class, int.class, int.class, int.class } );
 				} catch( Exception ex ) {
-					ex.printStackTrace();
+					Logger.getLogger( FlatLaf.class.getName() ).log( Level.SEVERE, null, ex );
 					throw new RuntimeException( ex );
 				}
 			}
@@ -64,7 +67,7 @@ public class JavaCompatibility
 			else
 				drawStringUnderlineCharAtMethod.invoke( null, c, g, text, underlinedIndex, x, y );
 		} catch( IllegalAccessException | IllegalArgumentException | InvocationTargetException ex ) {
-			ex.printStackTrace();
+			Logger.getLogger( FlatLaf.class.getName() ).log( Level.SEVERE, null, ex );
 			throw new RuntimeException( ex );
 		}
 	}