Java 8 lambda causes NoClassDefFoundError: java.util.function.Function

[davidgiga1993]

Please ensure you have given all the following requested information in your report.

Issue details

The following cause causes a java.lang.NoClassDefFoundError: java.util.function.Function

public void sortByName()
{
	sort(Comparator.comparing(a -> a.productName));
}

Reproduction steps/code

See issue

Configuration

Build Tools:

• Gradle plugin

Versions:

Please provide the version of RoboVM, XCode and JDK used

• Robovm: 2.3.11
• XCode: 12.2
• JDK: openJDK 13

Build Targets:
iOS 14.3

---

Stacktrace

See issue

[davidgiga1993]

When I replace the lambda with a simple comparator I get the following:

public class MidiPortList extends ArrayList<MidiPort> {
  public void sortByName()
  {
	  sort(new Comparator<T>()
	  {
		  @Override
		  public int compare(T o1, T o2)
		  {
			  return o1.productName.compareTo(o2.productName);
		  }
	  });
  }
}

java.lang.NoSuchMethodError: abc.MidiPortList.sort(Ljava/util/Comparator;)V
at abc.MidiPortList.sortByName

But the ArrayList.sort method should be included in jdk8, or am I missing something here?

When using the java 7 Collections.sort instead it's working fine:

Collections.sort(this, new Comparator<T>()
{
	@Override
	public int compare(T o1, T o2)
	{
		return o1.productName.compareTo(o2.productName);
	}
});

Oh I just noticed: This is related / duplicate to #555