chore: resolve some warnings reported by IntelliJ Idea

jadx-core/src/main/java/jadx/api/JadxDecompiler.java

@@ -69,9 +69,9 @@ import jadx.core.xmlgen.ResourcesSaver;
 public final class JadxDecompiler implements Closeable {
 	private static final Logger LOG = LoggerFactory.getLogger(JadxDecompiler.class);
 
-	private JadxArgs args;
-	private JadxPluginManager pluginManager = new JadxPluginManager();
-	private List<ILoadResult> loadedInputs = new ArrayList<>();
+	private final JadxArgs args;
+	private final JadxPluginManager pluginManager = new JadxPluginManager();
+	private final List<ILoadResult> loadedInputs = new ArrayList<>();
 
 	private RootNode root;
 	private List<JavaClass> classes;

jadx-core/src/main/java/jadx/core/codegen/AnnotationGen.java

@@ -133,8 +133,11 @@ public class AnnotationGen {
 	public EncodedValue getAnnotationDefaultValue(String name) {
 		IAnnotation an = cls.getAnnotation(Consts.DALVIK_ANNOTATION_DEFAULT);
 		if (an != null) {
-			IAnnotation defAnnotation = (IAnnotation) an.getDefaultValue().getValue();
-			return defAnnotation.getValues().get(name);
+			EncodedValue defValue = an.getDefaultValue();
+			if (defValue != null) {
+				IAnnotation defAnnotation = (IAnnotation) defValue.getValue();
+				return defAnnotation.getValues().get(name);
+			}
 		}
 		return null;
 	}

jadx-core/src/main/java/jadx/core/codegen/ClassGen.java

@@ -234,11 +234,8 @@ public class ClassGen {
 	}
 
 	/**
-	 *
-	 * @param clsCode
 	 * @param printClassName allows to print the original class name as comment (e.g. for inlined
 	 *                       classes)
-	 * @throws CodegenException
 	 */
 	public void addClassBody(CodeWriter clsCode, boolean printClassName) throws CodegenException {
 		clsCode.add('{');

jadx-core/src/main/java/jadx/core/codegen/CodeWriter.java

@@ -14,6 +14,7 @@ import jadx.api.ICodeInfo;
 import jadx.api.impl.SimpleCodeInfo;
 import jadx.core.dex.attributes.nodes.LineAttrNode;
 import jadx.core.utils.StringUtils;
+import jadx.core.utils.Utils;
 
 public class CodeWriter {
 	private static final Logger LOG = LoggerFactory.getLogger(CodeWriter.class);
@@ -153,17 +154,12 @@ public class CodeWriter {
 		return this;
 	}
 
-	@SuppressWarnings("StringRepeatCanBeUsed")
 	private void updateIndent() {
 		int curIndent = indent;
 		if (curIndent < INDENT_CACHE.length) {
 			this.indentStr = INDENT_CACHE[curIndent];
 		} else {
-			StringBuilder s = new StringBuilder(curIndent * INDENT_STR.length());
-			for (int i = 0; i < curIndent; i++) {
-				s.append(INDENT_STR);
-			}
-			this.indentStr = s.toString();
+			this.indentStr = Utils.strRepeat(INDENT_STR, curIndent);
 		}
 	}
 

jadx-core/src/main/java/jadx/core/deobf/Deobfuscator.java

@@ -368,7 +368,7 @@ public class Deobfuscator {
 
 	public String getPkgAlias(ClassNode cls) {
 		ClassInfo classInfo = cls.getClassInfo();
-		PackageNode pkg = null;
+		PackageNode pkg;
 		DeobfClsInfo deobfClsInfo = clsMap.get(classInfo);
 		if (deobfClsInfo != null) {
 			pkg = deobfClsInfo.getPkg();
@@ -420,9 +420,6 @@ public class Deobfuscator {
 	/**
 	 * Generate a prefix for a class name that bases on certain class properties, certain
 	 * extended superclasses or implemented interfaces.
-	 *
-	 * @param cls
-	 * @return
 	 */
 	private String makeClsPrefix(ClassNode cls) {
 		if (cls.isEnum()) {

jadx-core/src/main/java/jadx/core/deobf/OverridedMethodsNode.java

@@ -6,7 +6,7 @@ import jadx.core.dex.info.MethodInfo;
 
 class OverridedMethodsNode {
 
-	private Set<MethodInfo> methods;
+	private final Set<MethodInfo> methods;
 
 	public OverridedMethodsNode(Set<MethodInfo> methodsSet) {
 		methods = methodsSet;

jadx-core/src/main/java/jadx/core/dex/nodes/InsnNode.java

@@ -454,6 +454,7 @@ public class InsnNode extends LineAttrNode {
 	/**
 	 * Compare instruction only by identity.
 	 */
+	@SuppressWarnings("EmptyMethod")
 	@Override
 	public final int hashCode() {
 		return super.hashCode();

jadx-core/src/main/java/jadx/core/dex/nodes/RootNode.java

@@ -434,6 +434,7 @@ public class RootNode {
 		return appPackage;
 	}
 
+	@Nullable
 	public ClassNode getAppResClass() {
 		return appResClass;
 	}

jadx-core/src/main/java/jadx/core/dex/nodes/parser/SignatureParser.java

@@ -259,6 +259,7 @@ public class SignatureParser {
 	 * <p/>
 	 * Example: "<T:Ljava/lang/Exception;:Ljava/lang/Object;>"
 	 */
+	@SuppressWarnings("ConditionalBreakInInfiniteLoop")
 	public List<ArgType> consumeGenericTypeParameters() {
 		if (!lookAhead('<')) {
 			return Collections.emptyList();

jadx-core/src/main/java/jadx/core/dex/visitors/OverrideMethodVisitor.java

@@ -84,7 +84,7 @@ public class OverrideMethodVisitor extends AbstractVisitor {
 	}
 
 	/**
-	 * NOTE: Simplified version of method from {@link ModVisitor#isFieldVisibleInMethod}
+	 * NOTE: Simplified version of method from ModVisitor.isFieldVisibleInMethod
 	 */
 	private boolean isMethodVisibleInCls(MethodNode superMth, ClassNode cls) {
 		AccessInfo accessFlags = superMth.getAccessFlags();

jadx-core/src/main/java/jadx/core/dex/visitors/regions/ProcessTryCatchRegions.java

@@ -38,12 +38,9 @@ public class ProcessTryCatchRegions extends AbstractRegionVisitor {
 		Map<BlockNode, TryCatchBlock> tryBlocksMap = new HashMap<>(2);
 		searchTryCatchDominators(mth, tryBlocksMap);
 
-		IRegionIterativeVisitor visitor = new IRegionIterativeVisitor() {
-			@Override
-			public boolean visitRegion(MethodNode mth, IRegion region) {
-				boolean changed = checkAndWrap(mth, tryBlocksMap, region);
-				return changed && !tryBlocksMap.isEmpty();
-			}
+		IRegionIterativeVisitor visitor = (regionMth, region) -> {
+			boolean changed = checkAndWrap(regionMth, tryBlocksMap, region);
+			return changed && !tryBlocksMap.isEmpty();
 		};
 		DepthRegionTraversal.traverseIncludingExcHandlers(mth, visitor);
 	}

jadx-core/src/main/java/jadx/core/dex/visitors/regions/RegionMaker.java

@@ -60,8 +60,8 @@ public class RegionMaker {
 
 	private final MethodNode mth;
 	private final int regionsLimit;
+	private final BitSet processedBlocks;
 	private int regionsCount;
-	private BitSet processedBlocks;
 
 	public RegionMaker(MethodNode mth) {
 		this.mth = mth;

jadx-core/src/main/java/jadx/core/dex/visitors/regions/RegionStack.java

@@ -34,12 +34,13 @@ final class RegionStack {
 			exits = new HashSet<>(4);
 		}
 
-		private State(State c) {
-			exits = new HashSet<>(c.exits);
+		private State(State c, IRegion region) {
+			this.exits = new HashSet<>(c.exits);
+			this.region = region;
 		}
 
-		public State copy() {
-			return new State(this);
+		public State copyWith(IRegion region) {
+			return new State(this, region);
 		}
 
 		@Override
@@ -64,8 +65,7 @@ final class RegionStack {
 		if (stack.size() > REGIONS_STACK_LIMIT) {
 			throw new JadxOverflowException("Regions stack size limit reached");
 		}
-		curState = curState.copy();
-		curState.region = region;
+		curState = curState.copyWith(region);
 		if (DEBUG) {
 			LOG.debug("Stack push: {}: {}", size(), curState);
 		}

jadx-core/src/main/java/jadx/core/dex/visitors/typeinference/AbstractTypeConstraint.java

@@ -11,8 +11,8 @@ import jadx.core.utils.Utils;
 
 public abstract class AbstractTypeConstraint implements ITypeConstraint {
 
-	protected InsnNode insn;
-	protected List<SSAVar> relatedVars;
+	protected final InsnNode insn;
+	protected final List<SSAVar> relatedVars;
 
 	public AbstractTypeConstraint(InsnNode insn, InsnArg arg) {
 		this.insn = insn;

jadx-core/src/main/java/jadx/core/dex/visitors/typeinference/TypeSearchState.java

@@ -17,7 +17,7 @@ import jadx.core.utils.exceptions.JadxRuntimeException;
 
 public class TypeSearchState {
 
-	private Map<SSAVar, TypeSearchVarInfo> varInfoMap;
+	private final Map<SSAVar, TypeSearchVarInfo> varInfoMap;
 
 	public TypeSearchState(MethodNode mth) {
 		List<SSAVar> vars = mth.getSVars();

jadx-core/src/main/java/jadx/core/export/ExportGradleProject.java

@@ -25,8 +25,8 @@ public class ExportGradleProject {
 
 	private final RootNode root;
 	private final File outDir;
-	private File srcOutDir;
-	private File resOutDir;
+	private final File srcOutDir;
+	private final File resOutDir;
 
 	public ExportGradleProject(RootNode root, File outDir) {
 		this.root = root;

jadx-core/src/main/java/jadx/core/utils/DebugChecks.java

@@ -160,6 +160,7 @@ public class DebugChecks {
 					InsnNode parentInsn = useArg.getParentInsn();
 					if (parentInsn != null && parentInsn == usedInPhi) {
 						found = true;
+						break;
 					}
 				}
 				if (!found) {
@@ -168,5 +169,4 @@ public class DebugChecks {
 			}
 		}
 	}
-
 }

jadx-core/src/main/java/jadx/core/utils/EncodedValueUtils.java

@@ -41,6 +41,7 @@ public class EncodedValueUtils {
 			case ENCODED_DOUBLE:
 				return InsnArg.lit(Double.doubleToLongBits((Double) value), ArgType.DOUBLE);
 			case ENCODED_STRING:
+				// noinspection RedundantCast
 				return (String) value;
 
 			case ENCODED_TYPE:

jadx-core/src/main/java/jadx/core/utils/ImmutableList.java

@@ -88,8 +88,8 @@ public final class ImmutableList<E> implements List<E>, RandomAccess {
 	@Override
 	public Iterator<E> iterator() {
 		return new Iterator<E>() {
+			private final int len = arr.length;
 			private int index = 0;
-			private int len = arr.length;
 
 			@Override
 			public boolean hasNext() {

jadx-core/src/main/java/jadx/core/utils/android/ExtDataInput.java

@@ -84,7 +84,7 @@ public class ExtDataInput extends DataInputDelegate {
 	@SuppressWarnings("InnerAssignment")
 	public final int skipBytes(int n) throws IOException {
 		int total = 0;
-		int cur = 0;
+		int cur;
 
 		while ((total < n) && ((cur = super.skipBytes(n - total)) > 0)) {
 			total += cur;

jadx-core/src/main/java/jadx/core/xmlgen/BinaryXMLParser.java

@@ -56,7 +56,7 @@ public class BinaryXMLParser extends CommonBinaryParser {
 	private int namespaceDepth = 0;
 	private int[] resourceIds;
 
-	private RootNode rootNode;
+	private final RootNode rootNode;
 	private String appPackageName;
 
 	public BinaryXMLParser(RootNode rootNode) {

jadx-core/src/main/java/jadx/core/xmlgen/ResourcesSaver.java

@@ -20,7 +20,7 @@ public class ResourcesSaver implements Runnable {
 	private static final Logger LOG = LoggerFactory.getLogger(ResourcesSaver.class);
 
 	private final ResourceFile resourceFile;
-	private File outDir;
+	private final File outDir;
 
 	public ResourcesSaver(File outDir, ResourceFile resourceFile) {
 		this.resourceFile = resourceFile;