Downgrade to Java 8

core/src/main/java/com/seibel/lod/core/api/external/methods/data/DhApiTerrainDataRepo.java

@@ -137,9 +137,9 @@ public class DhApiTerrainDataRepo implements IDhApiTerrainDataRepo
 		int dataColumnsReturned = 0;
 		
 		// get each column over the area
-		for (var x = 0; x < widthOfAreaInBlocks; x++)
+		for (int x = 0; x < widthOfAreaInBlocks; x++)
 		{
-			for (var z = 0; z < widthOfAreaInBlocks; z++)
+			for (int z = 0; z < widthOfAreaInBlocks; z++)
 			{
 				DhLodPos blockColumnPos = new DhLodPos(LodUtil.BLOCK_DETAIL_LEVEL, startingBlockPos.x + x, startingBlockPos.z + z);
 				DhApiResult<DhApiTerrainDataPoint[]> result = getTerrainDataColumnArray(levelWrapper, blockColumnPos, null);

core/src/main/java/com/seibel/lod/core/dataObjects/fullData/sources/SingleChunkFullDataSource.java

@@ -154,7 +154,9 @@ public class SingleChunkFullDataSource extends FullArrayView implements IIncompl
 				throw new IOException(LodUtil.formatLog("Spotty Flag BitSet size outside reasonable range: {} (expects {} to {})",
 						length, 1, SECTION_SIZE * SECTION_SIZE / 8 + 63));
 			}
-            byte[] bytes = dos.readNBytes(length);
+			
+			byte[] bytes = new byte[length];
+		 	dos.readFully(bytes, 0, length);
             BitSet isColumnNotEmpty = BitSet.valueOf(bytes);
 
             // Data array content

core/src/main/java/com/seibel/lod/core/dataObjects/fullData/sources/SparseFullDataSource.java

@@ -364,7 +364,8 @@ public class SparseFullDataSource implements IIncompleteFullDataSource
 				}
 				
 				// read in the presence of each data column
-				byte[] bytes = inputStream.readNBytes(numberOfDataColumns);
+				byte[] bytes = new byte[numberOfDataColumns];
+				inputStream.readFully(bytes, 0, numberOfDataColumns);
 				BitSet dataArrayIndexHasData = BitSet.valueOf(bytes);
 				
 				

core/src/main/java/com/seibel/lod/core/dataObjects/render/columnViews/IColumnDataView.java

@@ -10,7 +10,7 @@ public interface IColumnDataView
 	
 	default Iterator<Long> iterator()
 	{
-		return new Iterator<>()
+		return new Iterator<Long>()
 		{
 			private int index = 0;
 			private final int size = size();

core/src/main/java/com/seibel/lod/core/file/fullDatafile/FullDataFileHandler.java

@@ -375,7 +375,7 @@ public class FullDataFileHandler implements IFullDataSourceProvider
 						})
                 );
             }
-            return CompletableFuture.allOf(futures.toArray(CompletableFuture[]::new))
+            return CompletableFuture.allOf(futures.toArray(new CompletableFuture[0]))
                     .thenApply((v) -> dataSource.trySelfPromote());
      
         }

core/src/main/java/com/seibel/lod/core/file/fullDatafile/GeneratedFullDataFileHandler.java

@@ -110,7 +110,7 @@ public class GeneratedFullDataFileHandler extends FullDataFileHandler
                         })
                 );
             }
-            return CompletableFuture.allOf(futures.toArray(CompletableFuture[]::new))
+            return CompletableFuture.allOf(futures.toArray(new CompletableFuture[0]))
                     .thenApply((voidValue) -> dataSource.trySelfPromote());
         }
     }

core/src/main/java/com/seibel/lod/core/file/structure/ClientOnlySaveStructure.java

@@ -13,6 +13,7 @@ import com.seibel.lod.core.wrapperInterfaces.world.ILevelWrapper;
 import javax.annotation.Nullable;
 import java.io.File;
 import java.util.*;
+import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
 /**
@@ -122,7 +123,7 @@ public class ClientOnlySaveStructure extends AbstractSaveStructure
 				}
 		).sorted();
 		
-		return fileStream.toList();
+		return fileStream.collect(Collectors.toList());
 	}
 	
 	@Override

core/src/main/java/com/seibel/lod/core/generation/WorldGenerationQueue.java

@@ -610,7 +610,7 @@ public class WorldGenerationQueue implements Closeable
 											return null;
 										}));
 									});
-		this.generatorClosingFuture = CompletableFuture.allOf(array.toArray(CompletableFuture[]::new)); //FIXME: Closer threading issues with runCurrentGenTasksUntilBusy
+		this.generatorClosingFuture = CompletableFuture.allOf(array.toArray(new CompletableFuture[0])); //FIXME: Closer threading issues with runCurrentGenTasksUntilBusy
 		this.looseWoldGenTasks.forEach(t -> t.future.complete(false));
 		this.looseWoldGenTasks.clear();
 		return this.generatorClosingFuture;
@@ -627,7 +627,8 @@ public class WorldGenerationQueue implements Closeable
 		
 		try
 		{
-			this.generatorClosingFuture.orTimeout(SHUTDOWN_TIMEOUT_SEC, TimeUnit.SECONDS).join();
+			// this will throw a timeout exception if the generator doesn't return soon enough
+			this.generatorClosingFuture.get(SHUTDOWN_TIMEOUT_SEC, TimeUnit.SECONDS);
 		}
 		catch (Throwable e)
 		{