Use some diamond operators just for kicks.

src/main/java/com/threerings/getdown/data/Application.java

@@ -304,7 +304,7 @@ public class Application
      */
     public List<Resource> getAllActiveResources ()
     {
-        List<Resource> allResources = new ArrayList<Resource>();
+        List<Resource> allResources = new ArrayList<>();
         allResources.addAll(getActiveCodeResources());
         allResources.addAll(getActiveResources());
         return allResources;
@@ -350,7 +350,7 @@ public class Application
      */
     public List<Resource> getActiveCodeResources ()
     {
-        ArrayList<Resource> codes = new ArrayList<Resource>();
+        ArrayList<Resource> codes = new ArrayList<>();
         codes.addAll(getCodeResources());
         for (AuxGroup aux : getAuxGroups()) {
             if (isAuxGroupActive(aux.name)) {
@@ -365,7 +365,7 @@ public class Application
      */
     public List<Resource> getActiveResources ()
     {
-        ArrayList<Resource> rsrcs = new ArrayList<Resource>();
+        ArrayList<Resource> rsrcs = new ArrayList<>();
         rsrcs.addAll(getResources());
         for (AuxGroup aux : getAuxGroups()) {
             if (isAuxGroupActive(aux.name)) {
@@ -529,7 +529,7 @@ public class Application
         if (cdata == null) {
             String appbase = SysProps.appBase();
             log.info("Attempting to obtain 'appbase' from system property", "appbase", appbase);
-            cdata = new HashMap<String,Object>();
+            cdata = new HashMap<>();
             cdata.put("appbase", appbase);
         }
 
@@ -622,12 +622,12 @@ public class Application
         // check for tracking progress percent configuration
         String trackPcts = (String)cdata.get("tracking_percents");
         if (!StringUtil.isBlank(trackPcts)) {
-            _trackingPcts = new HashSet<Integer>();
+            _trackingPcts = new HashSet<>();
             for (int pct : StringUtil.parseIntArray(trackPcts)) {
                 _trackingPcts.add(pct);
             }
         } else if (!StringUtil.isBlank(_trackingURL)) {
-            _trackingPcts = new HashSet<Integer>();
+            _trackingPcts = new HashSet<>();
             _trackingPcts.add(50);
         }
 
@@ -663,10 +663,10 @@ public class Application
 
         // parse our auxiliary resource groups
         for (String auxgroup : parseList(cdata, "auxgroups")) {
-            ArrayList<Resource> codes = new ArrayList<Resource>();
+            ArrayList<Resource> codes = new ArrayList<>();
             parseResources(cdata, auxgroup + ".code", false, codes);
             parseResources(cdata, auxgroup + ".ucode", true, codes);
-            ArrayList<Resource> rsrcs = new ArrayList<Resource>();
+            ArrayList<Resource> rsrcs = new ArrayList<>();
             parseResources(cdata, auxgroup + ".resource", false, rsrcs);
             parseResources(cdata, auxgroup + ".uresource", true, rsrcs);
             _auxgroups.put(auxgroup, new AuxGroup(auxgroup, codes, rsrcs));
@@ -945,7 +945,7 @@ public class Application
     public Process createProcess (boolean optimum)
         throws IOException
     {
-        ArrayList<String> args = new ArrayList<String>();
+        ArrayList<String> args = new ArrayList<>();
 
         // reconstruct the path to the JVM
         args.add(LaunchUtil.getJVMPath(_appdir, _windebug || optimum));
@@ -1033,14 +1033,14 @@ public class Application
      */
     protected String[] createEnvironment ()
     {
-        List<String> envvar = new ArrayList<String>();
+        List<String> envvar = new ArrayList<>();
         fillAssignmentListFromPairs("env.txt", envvar);
         if (envvar.isEmpty()) {
             log.info("Didn't find any custom environment variables, not setting any.");
             return null;
         }
 
-        List<String> envAssignments = new ArrayList<String>();
+        List<String> envAssignments = new ArrayList<>();
         for (String assignment : envvar) {
             envAssignments.add(processArg(assignment));
         }
@@ -1087,7 +1087,7 @@ public class Application
         }
 
         // pass along any pass-through arguments
-        Map<String, String> passProps = new HashMap<String, String>();
+        Map<String, String> passProps = new HashMap<>();
         for (Map.Entry<Object, Object> entry : System.getProperties().entrySet()) {
             String key = (String)entry.getKey();
             if (key.startsWith(PROP_PASSTHROUGH_PREFIX)) {
@@ -1317,9 +1317,9 @@ public class Application
 
         final boolean noUnpack = SysProps.noUnpack();
         final int[] fAlreadyValid = alreadyValid;
-        final Set<Resource> toInstallAsync = new ConcurrentSkipListSet<Resource>(toInstall);
+        final Set<Resource> toInstallAsync = new ConcurrentSkipListSet<>(toInstall);
-        final Set<Resource> toDownloadAsync = new ConcurrentSkipListSet<Resource>();
+        final Set<Resource> toDownloadAsync = new ConcurrentSkipListSet<>();
-        final Set<Resource> unpackedAsync = new ConcurrentSkipListSet<Resource>();
+        final Set<Resource> unpackedAsync = new ConcurrentSkipListSet<>();
 
         for (int ii = 0; ii < sizes.length; ii++) {
             final Resource rsrc = rsrcs.get(ii);
@@ -1717,7 +1717,7 @@ public class Application
      */
     public static List<Integer> intsToList (int[] values)
     {
-        List<Integer> list = new ArrayList<Integer>(values.length);
+        List<Integer> list = new ArrayList<>(values.length);
         for (int val : values) {
             list.add(val);
         }
@@ -1894,24 +1894,24 @@ public class Application
     protected boolean _javaExactVersionRequired;
     protected String _javaLocation;
 
-    protected List<Resource> _codes = new ArrayList<Resource>();
+    protected List<Resource> _codes = new ArrayList<>();
-    protected List<Resource> _resources = new ArrayList<Resource>();
+    protected List<Resource> _resources = new ArrayList<>();
 
     protected boolean _useCodeCache;
     protected int _codeCacheRetentionDays;
 
-    protected Map<String,AuxGroup> _auxgroups = new HashMap<String,AuxGroup>();
+    protected Map<String,AuxGroup> _auxgroups = new HashMap<>();
-    protected Map<String,Boolean> _auxactive = new HashMap<String,Boolean>();
+    protected Map<String,Boolean> _auxactive = new HashMap<>();
 
-    protected List<String> _jvmargs = new ArrayList<String>();
+    protected List<String> _jvmargs = new ArrayList<>();
-    protected List<String> _appargs = new ArrayList<String>();
+    protected List<String> _appargs = new ArrayList<>();
 
     protected String[] _extraJvmArgs;
     protected String[] _extraAppArgs;
 
     protected String[] _optimumJvmArgs;
 
-    protected List<String> _txtJvmArgs = new ArrayList<String>();
+    protected List<String> _txtJvmArgs = new ArrayList<>();
 
     protected List<Certificate> _signers;
 

src/main/java/com/threerings/getdown/data/Digest.java

@@ -49,13 +49,13 @@ public class Digest
     {
         // first compute the digests for all the resources in parallel
         Executor exec = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors());
-        final Map<Resource, String> digests = new ConcurrentHashMap<Resource, String>();
+        final Map<Resource, String> digests = new ConcurrentHashMap<>();
-        final BlockingQueue<Object> completed = new LinkedBlockingQueue<Object>();
+        final BlockingQueue<Object> completed = new LinkedBlockingQueue<>();
         final int fversion = version;
 
         long start = System.currentTimeMillis();
 
-        Set<Resource> pending = new HashSet<Resource>(resources);
+        Set<Resource> pending = new HashSet<>(resources);
         for (final Resource rsrc : resources) {
             exec.execute(new Runnable() {
                 public void run () {
@@ -212,7 +212,7 @@ public class Digest
         data.append(path).append(" = ").append(digest).append("\n");
     }
 
-    protected HashMap<String, String> _digests = new HashMap<String, String>();
+    protected HashMap<String, String> _digests = new HashMap<>();
     protected String _metaDigest = "";
 
     protected static final String FILE_NAME = "digest";

src/main/java/com/threerings/getdown/launcher/Getdown.java

@@ -430,9 +430,9 @@ public abstract class Getdown extends Thread
             int[] alreadyValid = new int[1];
 
             // we'll keep track of all the resources we unpack
-            Set<Resource> unpacked = new HashSet<Resource>();
+            Set<Resource> unpacked = new HashSet<>();
 
-            _toInstallResources = new HashSet<Resource>();
+            _toInstallResources = new HashSet<>();
             _readyToInstall = false;
 
             //setStep(Step.START);
@@ -466,7 +466,7 @@ public abstract class Getdown extends Thread
                 // now verify our resources...
                 setStep(Step.VERIFY_RESOURCES);
                 setStatusAsync("m.validating", -1, -1L, false);
-                Set<Resource> toDownload = new HashSet<Resource>();
+                Set<Resource> toDownload = new HashSet<>();
                 _app.verifyResources(_progobs, alreadyValid, unpacked,
                                      _toInstallResources, toDownload);
                 if (toDownload.size() == 0) {
@@ -622,7 +622,7 @@ public abstract class Getdown extends Thread
         reportTrackingEvent("jvm_start", -1);
 
         updateStatus("m.downloading_java");
-        List<Resource> list = new ArrayList<Resource>();
+        List<Resource> list = new ArrayList<>();
         list.add(vmjar);
         download(list);
 
@@ -682,7 +682,7 @@ public abstract class Getdown extends Thread
         // attempt to download the patch files
         Resource patch = _app.getPatchResource(null);
         if (patch != null) {
-            List<Resource> list = new ArrayList<Resource>();
+            List<Resource> list = new ArrayList<>();
             list.add(patch);
 
             // add the auxiliary group patch files for activated groups

src/main/java/com/threerings/getdown/launcher/GetdownApp.java

@@ -88,7 +88,7 @@ public class GetdownApp
 
         // load X.509 certificate if it exists
         File crtFile = new File(appDir, Digest.digestFile(Digest.VERSION) + ".crt");
-        List<Certificate> crts = new ArrayList<Certificate>();
+        List<Certificate> crts = new ArrayList<>();
         if (crtFile.exists()) {
             try {
                 FileInputStream fis = new FileInputStream(crtFile);
@@ -148,7 +148,7 @@ public class GetdownApp
                 }
 
                 if (_ifc.iconImages != null) {
-                    ArrayList<Image> icons = new ArrayList<Image>();
+                    ArrayList<Image> icons = new ArrayList<>();
                     for (String path : _ifc.iconImages) {
                         Image img = loadImage(path);
                         if (img == null) {

src/main/java/com/threerings/getdown/launcher/GetdownApplet.java

@@ -85,7 +85,7 @@ public class GetdownApplet extends JApplet
                 _errmsg = e.getMessage();
             }
 
-            List<Certificate> signers = new ArrayList<Certificate>();
+            List<Certificate> signers = new ArrayList<>();
             Certificate cert = loadCertificate("resource.crt");
             if (cert != null) {
                 signers.add(cert);

src/main/java/com/threerings/getdown/launcher/GetdownAppletConfig.java

@@ -299,7 +299,7 @@ public class GetdownAppletConfig
      */
     protected List<String> parseArgList (String prefix)
     {
-        List<String> arglist = new ArrayList<String>();
+        List<String> arglist = new ArrayList<>();
         String value;
         for (int ii = 0; (value = getParameter(prefix + ii)) != null; ii++) {
             arglist.add(value);

src/main/java/com/threerings/getdown/net/Downloader.java

@@ -234,10 +234,10 @@ public abstract class Downloader extends Thread
     protected Collection<Resource> _resources;
 
     /** The reported sizes of our resources. */
-    protected Map<Resource, Long> _sizes = new HashMap<Resource, Long>();
+    protected Map<Resource, Long> _sizes = new HashMap<>();
 
     /** The bytes downloaded for each resource. */
-    protected Map<Resource, Long> _downloaded = new HashMap<Resource, Long>();
+    protected Map<Resource, Long> _downloaded = new HashMap<>();
 
     /** The observer with whom we are communicating. */
     protected Observer _obs;

src/main/java/com/threerings/getdown/tools/Differ.java

@@ -60,13 +60,13 @@ public class Differ
 
         Application oapp = new Application(ovdir, null);
         oapp.init(false);
-        ArrayList<Resource> orsrcs = new ArrayList<Resource>();
+        ArrayList<Resource> orsrcs = new ArrayList<>();
         orsrcs.addAll(oapp.getCodeResources());
         orsrcs.addAll(oapp.getResources());
 
         Application napp = new Application(nvdir, null);
         napp.init(false);
-        ArrayList<Resource> nrsrcs = new ArrayList<Resource>();
+        ArrayList<Resource> nrsrcs = new ArrayList<>();
         nrsrcs.addAll(napp.getCodeResources());
         nrsrcs.addAll(napp.getResources());
 
@@ -76,13 +76,13 @@ public class Differ
 
         // next create patches for any auxiliary resource groups
         for (Application.AuxGroup ag : napp.getAuxGroups()) {
-            orsrcs = new ArrayList<Resource>();
+            orsrcs = new ArrayList<>();
             Application.AuxGroup oag = oapp.getAuxGroup(ag.name);
             if (oag != null) {
                 orsrcs.addAll(oag.codes);
                 orsrcs.addAll(oag.rsrcs);
             }
-            nrsrcs = new ArrayList<Resource>();
+            nrsrcs = new ArrayList<>();
             nrsrcs.addAll(ag.codes);
             nrsrcs.addAll(ag.rsrcs);
             patch = new File(nvdir, "patch-" + ag.name + overs + ".dat");

src/main/java/com/threerings/getdown/tools/Digester.java

@@ -76,7 +76,7 @@ public class Digester
         Application app = new Application(appdir, null);
         app.init(false);
 
-        List<Resource> rsrcs = new ArrayList<Resource>();
+        List<Resource> rsrcs = new ArrayList<>();
         rsrcs.add(app.getConfigResource());
         rsrcs.addAll(app.getCodeResources());
         rsrcs.addAll(app.getResources());

src/main/java/com/threerings/getdown/tools/JarDiff.java

@@ -73,10 +73,10 @@ public class JarDiff implements JarDiffCodes
         JarFile2 newJar = new JarFile2(newPath);
 
         try {
-            HashMap<String,String> moved = new HashMap<String,String>();
+            HashMap<String,String> moved = new HashMap<>();
-            HashSet<String> implicit = new HashSet<String>();
+            HashSet<String> implicit = new HashSet<>();
-            HashSet<String> moveSrc = new HashSet<String>();
+            HashSet<String> moveSrc = new HashSet<>();
-            HashSet<String> newEntries = new HashSet<String>();
+            HashSet<String> newEntries = new HashSet<>();
 
             // FIRST PASS
             // Go through the entries in new jar and
@@ -152,7 +152,7 @@ public class JarDiff implements JarDiffCodes
 
             // SECOND PASS: <deleted files> = <oldjarnames> - <implicitmoves> -
             // <source of move commands> - <new or modified entries>
-            ArrayList<String> deleted = new ArrayList<String>();
+            ArrayList<String> deleted = new ArrayList<>();
             for (JarEntry oldEntry : oldJar) {
                 String oldName = oldEntry.getName();
                 if (!implicit.contains(oldName) && !moveSrc.contains(oldName)
@@ -452,9 +452,9 @@ public class JarDiff implements JarDiffCodes
         private void index () throws IOException {
             Enumeration<JarEntry> entries = _jar.entries();
 
-            _nameToEntryMap = new HashMap<String,JarEntry>();
+            _nameToEntryMap = new HashMap<>();
-            _crcToEntryMap = new HashMap<Long,LinkedList<JarEntry>>();
+            _crcToEntryMap = new HashMap<>();
-            _entries = new ArrayList<JarEntry>();
+            _entries = new ArrayList<>();
             if (_debug) {
                 System.out.println("indexing: " + _jar.getName());
             }

src/main/java/com/threerings/getdown/tools/JarDiffPatcher.java

@@ -54,16 +54,16 @@ public class JarDiffPatcher implements JarDiffCodes
             jos = new JarOutputStream(new FileOutputStream(target));
             oldJar = new JarFile(oldFile);
             jarDiff = new JarFile(diffFile);
-            Set<String> ignoreSet = new HashSet<String>();
+            Set<String> ignoreSet = new HashSet<>();
 
-            Map<String, String> renameMap = new HashMap<String, String>();
+            Map<String, String> renameMap = new HashMap<>();
             determineNameMapping(jarDiff, ignoreSet, renameMap);
 
             // get all keys in renameMap
             String[] keys = renameMap.keySet().toArray(new String[renameMap.size()]);
 
             // Files to implicit move
-            Set<String> oldjarNames  = new HashSet<String>();
+            Set<String> oldjarNames  = new HashSet<>();
             Enumeration<JarEntry> oldEntries = oldJar.entries();
             if (oldEntries != null) {
                 while  (oldEntries.hasMoreElements()) {
@@ -223,7 +223,7 @@ public class JarDiffPatcher implements JarDiffCodes
     {
         int index = 0;
         int length = path.length();
-        ArrayList<String> sub = new ArrayList<String>();
+        ArrayList<String> sub = new ArrayList<>();
 
         while (index < length) {
             while (index < length && Character.isWhitespace

src/main/java/com/threerings/getdown/util/ConfigUtil.java

@@ -72,7 +72,7 @@ public class ConfigUtil
      */
     public static List<String[]> parsePairs (Reader source, ParseOpts opts) throws IOException
     {
-        List<String[]> pairs = new ArrayList<String[]>();
+        List<String[]> pairs = new ArrayList<>();
         for (String line : FileUtil.readLines(source)) {
             // nix comments
             int cidx = line.indexOf("#");
@@ -133,7 +133,7 @@ public class ConfigUtil
     public static Map<String, Object> parseConfig (File source, ParseOpts opts)
         throws IOException
     {
-        Map<String, Object> data = new HashMap<String, Object>();
+        Map<String, Object> data = new HashMap<>();
 
         // I thought that we could use HashMap<String, String[]> and put new String[] {pair[1]} for
         // the null case, but it mysteriously dies on launch, so leaving it as HashMap<String,

src/main/java/com/threerings/getdown/util/FileUtil.java

@@ -86,7 +86,7 @@ public class FileUtil extends com.samskivert.util.FileUtil
     public static List<String> readLines (Reader in)
         throws IOException
     {
-        List<String> lines = new ArrayList<String>();
+        List<String> lines = new ArrayList<>();
         try {
             BufferedReader bin = new BufferedReader(in);
             for (String line = null; (line = bin.readLine()) != null; lines.add(line)) {}
@@ -156,7 +156,7 @@ public class FileUtil extends com.samskivert.util.FileUtil
      */
     public static void walkTree (File root, Visitor visitor)
     {
-        Deque<File> stack = new ArrayDeque<File>(Arrays.asList(root.listFiles()));
+        Deque<File> stack = new ArrayDeque<>(Arrays.asList(root.listFiles()));
         while (!stack.isEmpty()) {
             File currentFile = stack.pop();
             if (currentFile.exists()) {