Update PLaunchApp.java

JavaApp/src/main/java/net/kdt/pojavlaunch/PLaunchApp.java

@@ -18,7 +18,7 @@ public class PLaunchApp {
     public static JMinecraftVersionList.Version mVersion;
     public static boolean mIsAssetsProcessing = false;
     public static Thread[] assetThreads = new Thread[30];
-    public static int assetThrIndex = -1;
+    public static int assetThrIndex = 0;
 
     public static void main(String[] args) throws Throwable {
         // User might remove the minecraft folder, this can cause crashes, safety re-create it
@@ -183,7 +183,7 @@ public class PLaunchApp {
             Map<String, JAssetInfo> assetsObjects = assets.objects;
             File objectsDir = new File(outputDir, "objects");
             for (JAssetInfo asset : assetsObjects.values()) {
-                assetThreads[assetThrIndex++] = new Thread(() -> {
+                assetThreads[assetThrIndex] = new Thread(() -> {
                 
                 mIsAssetsProcessing = !UIKit.updateProgressSafe(currProgress / maxProgress, "Downloading " + assetsObjects.keySet().toArray(new String[0])[downloadedSs]);
                 
@@ -202,16 +202,19 @@ public class PLaunchApp {
                 downloadedSs++;
                 
                 });
-                
-                boolean isAllThreadsDone = false;
-                while (!isAllThreadsDone) {
-                    isAllThreadsDone = true;
-                    for (int i = 0; i < assetThreads.length; i++) {
-                        Thread thr = assetThreads[i];
-                        isAllThreadsDone &= thr == null || !thr.isAlive();
-                        
-                        if (thr != null && !thr.isAlive()) {
-                            assetThreads[i] = null;
+                assetThreads[assetThrIndex].start();
+                assetThrIndex++;
+
+                if (assetThrIndex == assetThreads.length) {
+                    boolean isAllThreadsDone = false;
+                    while (!isAllThreadsDone) {
+                        isAllThreadsDone = true;
+                        for (int i = 0; i < assetThreads.length; i++) {
+                            Thread thr = assetThreads[i];
+                            isAllThreadsDone &= thr == null || !thr.isAlive();
+                            if (thr != null && !thr.isAlive()) {
+                                assetThreads[i] = null;
+                            }
                         }
                     }
                 }