Java 18-ea is not there yet.
MODIFY
.github/workflows/maven.yml
.github/workflows/maven.yml
@@ -27,16 +27,16 @@ jobs:
os: [ubuntu-latest, windows-latest, macos-latest]
java: [ 8, 11, 17 ]
experimental: [false]
- include:
- - java: 18-ea
- os: ubuntu-latest
- experimental: true
- - java: 18-ea
- os: windows-latest
- experimental: true
- - java: 18-ea
- os: macos-latest
- experimental: true
+# include:
+# - java: 18-ea
+# os: ubuntu-latest
+# experimental: true
+# - java: 18-ea
+# os: windows-latest
+# experimental: true
+# - java: 18-ea
+# os: macos-latest
+# experimental: true
fail-fast: false
steps:

Java 18-ea is not there yet.