gui: fix incorrect settings loading

jadx-cli/src/main/java/jadx/cli/JadxCLI.java

@@ -11,7 +11,7 @@ import org.slf4j.LoggerFactory;
 public class JadxCLI {
 	private static final Logger LOG = LoggerFactory.getLogger(JadxCLI.class);
 
-	public static void main(String[] args) throws JadxException {
+	public static void main(String[] args) {
 		try {
 			JadxCLIArgs jadxArgs = new JadxCLIArgs();
 			if (processArgs(jadxArgs, args)) {

jadx-cli/src/main/java/jadx/cli/JadxCLIArgs.java

@@ -25,6 +25,8 @@ import com.beust.jcommander.ParameterException;
 
 public class JadxCLIArgs implements IJadxArgs {
 
+	protected static final int DEFAULT_THREADS_COUNT = Math.max(1, Runtime.getRuntime().availableProcessors() / 2);
+
 	@Parameter(description = "<input file> (.dex, .apk, .jar or .class)")
 	protected List<String> files;
 
@@ -32,7 +34,7 @@ public class JadxCLIArgs implements IJadxArgs {
 	protected String outDirName;
 
 	@Parameter(names = {"-j", "--threads-count"}, description = "processing threads count")
-	protected int threadsCount = Math.max(1, Runtime.getRuntime().availableProcessors() / 2);
+	protected int threadsCount = DEFAULT_THREADS_COUNT;
 
 	@Parameter(names = {"-r", "--no-res"}, description = "do not decode resources")
 	protected boolean skipResources = false;
@@ -108,7 +110,7 @@ public class JadxCLIArgs implements IJadxArgs {
 		}
 		try {
 			if (threadsCount <= 0) {
-				throw new JadxException("Threads count must be positive");
+				throw new JadxException("Threads count must be positive, got: " + threadsCount);
 			}
 			if (files != null) {
 				for (String fileName : files) {

jadx-gui/src/main/java/jadx/gui/settings/JadxSettings.java

@@ -43,6 +43,12 @@ public class JadxSettings extends JadxCLIArgs {
 		JadxSettingsAdapter.store(this);
 	}
 
+	public void fixOnLoad() {
+		if (threadsCount <= 0) {
+			threadsCount = DEFAULT_THREADS_COUNT;
+		}
+	}
+
 	public String getLastOpenFilePath() {
 		return lastOpenFilePath;
 	}

jadx-gui/src/main/java/jadx/gui/settings/JadxSettingsAdapter.java

@@ -50,6 +50,7 @@ public class JadxSettingsAdapter {
 				return new JadxSettings();
 			}
 			LOG.debug("Loaded settings: {}", makeString(settings));
+			settings.fixOnLoad();
 			return settings;
 		} catch (Exception e) {
 			LOG.error("Error load settings", e);