liff opened a new pull request, #578:
URL: https://github.com/apache/poi/pull/578
In Java 21 the RuntimeException from `sun.awt.FontConfiguration` is not
wrapped in an `InternalError` anymore and appears directly as a
`RuntimeException` when constructing a `TextLayout`.
So, when `ignoreMissingFontSystem` is set also allow a `RuntimeException` to
indicate a missing font system.
A demonstration of the difference (without POI and assuming JDK >=17 and
Docker are available):
1. Create `Test.java` with content:
```java
public class Test {
public static void main(String args[]) {
var frc = new java.awt.font.FontRenderContext(null, true, true);
var str = new java.text.AttributedString(String.valueOf('W'));
var layout = new java.awt.font.TextLayout(str.getIterator(),
frc);
System.out.println(layout.getAdvance());
}
}
```
3. Compile
2. Run on Java 17:
```shell
docker run -it --rm -v $(pwd)/Test.class:/Test.class
amazoncorretto:17-alpine java Test
```
3. Run on Java 21:
```shell
docker run -it --rm -v $(pwd)/Test.class:/Test.class
amazoncorretto:21-alpine java Test
```
On Java 17, you’ll see:
```
Exception in thread "main" java.lang.InternalError:
java.lang.reflect.InvocationTargetException
…
Caused by: java.lang.RuntimeException: Fontconfig head is null, check your
fonts or fonts configuration
```
On Java 21, the result is:
```
Exception in thread "main" java.lang.RuntimeException: Fontconfig head is
null, check your fonts or fonts configuration
…
```
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