diff --git a/flatlaf-core/.settings/org.eclipse.jdt.core.prefs b/flatlaf-core/.settings/org.eclipse.jdt.core.prefs
index 71b328aa..373257ca 100644
--- a/flatlaf-core/.settings/org.eclipse.jdt.core.prefs
+++ b/flatlaf-core/.settings/org.eclipse.jdt.core.prefs
@@ -1,4 +1,7 @@
 eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
+org.eclipse.jdt.core.compiler.compliance=1.8
+org.eclipse.jdt.core.compiler.source=1.8
 org.eclipse.jdt.core.formatter.align_assignment_statements_on_columns=false
 org.eclipse.jdt.core.formatter.align_fields_grouping_blank_lines=2147483647
 org.eclipse.jdt.core.formatter.align_type_members_on_columns=false
diff --git a/flatlaf-demo/.settings/org.eclipse.jdt.core.prefs b/flatlaf-demo/.settings/org.eclipse.jdt.core.prefs
index 71b328aa..373257ca 100644
--- a/flatlaf-demo/.settings/org.eclipse.jdt.core.prefs
+++ b/flatlaf-demo/.settings/org.eclipse.jdt.core.prefs
@@ -1,4 +1,7 @@
 eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
+org.eclipse.jdt.core.compiler.compliance=1.8
+org.eclipse.jdt.core.compiler.source=1.8
 org.eclipse.jdt.core.formatter.align_assignment_statements_on_columns=false
 org.eclipse.jdt.core.formatter.align_fields_grouping_blank_lines=2147483647
 org.eclipse.jdt.core.formatter.align_type_members_on_columns=false
diff --git a/flatlaf-extras/.settings/org.eclipse.jdt.core.prefs b/flatlaf-extras/.settings/org.eclipse.jdt.core.prefs
index 71b328aa..373257ca 100644
--- a/flatlaf-extras/.settings/org.eclipse.jdt.core.prefs
+++ b/flatlaf-extras/.settings/org.eclipse.jdt.core.prefs
@@ -1,4 +1,7 @@
 eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
+org.eclipse.jdt.core.compiler.compliance=1.8
+org.eclipse.jdt.core.compiler.source=1.8
 org.eclipse.jdt.core.formatter.align_assignment_statements_on_columns=false
 org.eclipse.jdt.core.formatter.align_fields_grouping_blank_lines=2147483647
 org.eclipse.jdt.core.formatter.align_type_members_on_columns=false
diff --git a/flatlaf-intellij-themes/.settings/org.eclipse.jdt.core.prefs b/flatlaf-intellij-themes/.settings/org.eclipse.jdt.core.prefs
index 71b328aa..373257ca 100644
--- a/flatlaf-intellij-themes/.settings/org.eclipse.jdt.core.prefs
+++ b/flatlaf-intellij-themes/.settings/org.eclipse.jdt.core.prefs
@@ -1,4 +1,7 @@
 eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
+org.eclipse.jdt.core.compiler.compliance=1.8
+org.eclipse.jdt.core.compiler.source=1.8
 org.eclipse.jdt.core.formatter.align_assignment_statements_on_columns=false
 org.eclipse.jdt.core.formatter.align_fields_grouping_blank_lines=2147483647
 org.eclipse.jdt.core.formatter.align_type_members_on_columns=false
diff --git a/flatlaf-jide-oss/.settings/org.eclipse.jdt.core.prefs b/flatlaf-jide-oss/.settings/org.eclipse.jdt.core.prefs
index 71b328aa..373257ca 100644
--- a/flatlaf-jide-oss/.settings/org.eclipse.jdt.core.prefs
+++ b/flatlaf-jide-oss/.settings/org.eclipse.jdt.core.prefs
@@ -1,4 +1,7 @@
 eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
+org.eclipse.jdt.core.compiler.compliance=1.8
+org.eclipse.jdt.core.compiler.source=1.8
 org.eclipse.jdt.core.formatter.align_assignment_statements_on_columns=false
 org.eclipse.jdt.core.formatter.align_fields_grouping_blank_lines=2147483647
 org.eclipse.jdt.core.formatter.align_type_members_on_columns=false
diff --git a/flatlaf-swingx/.settings/org.eclipse.jdt.core.prefs b/flatlaf-swingx/.settings/org.eclipse.jdt.core.prefs
index 71b328aa..373257ca 100644
--- a/flatlaf-swingx/.settings/org.eclipse.jdt.core.prefs
+++ b/flatlaf-swingx/.settings/org.eclipse.jdt.core.prefs
@@ -1,4 +1,7 @@
 eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
+org.eclipse.jdt.core.compiler.compliance=1.8
+org.eclipse.jdt.core.compiler.source=1.8
 org.eclipse.jdt.core.formatter.align_assignment_statements_on_columns=false
 org.eclipse.jdt.core.formatter.align_fields_grouping_blank_lines=2147483647
 org.eclipse.jdt.core.formatter.align_type_members_on_columns=false
diff --git a/flatlaf-testing/.settings/org.eclipse.jdt.core.prefs b/flatlaf-testing/.settings/org.eclipse.jdt.core.prefs
index 71b328aa..373257ca 100644
--- a/flatlaf-testing/.settings/org.eclipse.jdt.core.prefs
+++ b/flatlaf-testing/.settings/org.eclipse.jdt.core.prefs
@@ -1,4 +1,7 @@
 eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
+org.eclipse.jdt.core.compiler.compliance=1.8
+org.eclipse.jdt.core.compiler.source=1.8
 org.eclipse.jdt.core.formatter.align_assignment_statements_on_columns=false
 org.eclipse.jdt.core.formatter.align_fields_grouping_blank_lines=2147483647
 org.eclipse.jdt.core.formatter.align_type_members_on_columns=false
diff --git a/flatlaf-theme-editor/.settings/org.eclipse.jdt.core.prefs b/flatlaf-theme-editor/.settings/org.eclipse.jdt.core.prefs
index 71b328aa..373257ca 100644
--- a/flatlaf-theme-editor/.settings/org.eclipse.jdt.core.prefs
+++ b/flatlaf-theme-editor/.settings/org.eclipse.jdt.core.prefs
@@ -1,4 +1,7 @@
 eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
+org.eclipse.jdt.core.compiler.compliance=1.8
+org.eclipse.jdt.core.compiler.source=1.8
 org.eclipse.jdt.core.formatter.align_assignment_statements_on_columns=false
 org.eclipse.jdt.core.formatter.align_fields_grouping_blank_lines=2147483647
 org.eclipse.jdt.core.formatter.align_type_members_on_columns=false