Replace anonymous types with method references

core/src/main/java/hudson/model/LoadBalancer.java

@@ -83,11 +83,7 @@ public abstract class LoadBalancer implements ExtensionPoint {
             // build consistent hash for each work chunk
             List<ConsistentHash<ExecutorChunk>> hashes = new ArrayList<>(ws.works.size());
             for (int i=0; i<ws.works.size(); i++) {
-                ConsistentHash<ExecutorChunk> hash = new ConsistentHash<>(new Hash<ExecutorChunk>() {
-                    public String hash(ExecutorChunk node) {
-                        return node.getName();
-                    }
-                });
+                ConsistentHash<ExecutorChunk> hash = new ConsistentHash<>(ExecutorChunk::getName);
 
                 // Build a Map to pass in rather than repeatedly calling hash.add() because each call does lots of expensive work
                 List<ExecutorChunk> chunks = ws.works(i).applicableExecutorChunks();

core/src/main/java/hudson/util/ProcessTree.java

@@ -741,11 +741,7 @@ public abstract class ProcessTree implements Iterable<OSProcess>, IProcessTree,
         ProcfsUnix(boolean vetoersExist) {
             super(vetoersExist);
             
-            File[] processes = new File("/proc").listFiles(new FileFilter() {
-                public boolean accept(File f) {
-                    return f.isDirectory();
-                }
-            });
+            File[] processes = new File("/proc").listFiles(File::isDirectory);
             if(processes==null) {
                 LOGGER.info("No /proc");
                 return;