8274949: Use String.contains() instead of String.indexOf() in java.base

src/java.base/share/classes/java/net/HttpCookie.java

@@ -1078,13 +1078,13 @@ private static int guessCookieVersion(String header) {
         int version = 0;
 
         header = header.toLowerCase();
-        if (header.indexOf("expires=") != -1) {
+        if (header.contains("expires=")) {
             // only netscape cookie using 'expires'
             version = 0;
-        } else if (header.indexOf("version=") != -1) {
+        } else if (header.contains("version=")) {
             // version is mandatory for rfc 2965/2109 cookie
             version = 1;
-        } else if (header.indexOf("max-age") != -1) {
+        } else if (header.contains("max-age")) {
             // rfc 2965/2109 use 'max-age'
             version = 1;
         } else if (startsWithIgnoreCase(header, SET_COOKIE2)) {

src/java.base/share/classes/java/net/HttpURLConnection.java

@@ -600,7 +600,7 @@ public String getResponseMessage() throws IOException {
     public long getHeaderFieldDate(String name, long Default) {
         String dateString = getHeaderField(name);
         try {
-            if (dateString.indexOf("GMT") == -1) {
+            if (!dateString.contains("GMT")) {
                 dateString = dateString+" GMT";
             }
             return Date.parse(dateString);

src/java.base/share/classes/java/net/SocketPermission.java

@@ -30,12 +30,10 @@
 import java.io.ObjectOutputStream;
 import java.io.ObjectStreamField;
 import java.io.Serializable;
-import java.net.InetAddress;
 import java.security.AccessController;
 import java.security.Permission;
 import java.security.PermissionCollection;
 import java.security.PrivilegedAction;
-import java.security.Security;
 import java.util.Collections;
 import java.util.Enumeration;
 import java.util.Map;
@@ -333,7 +331,7 @@ private static String getHost(String host) {
                         ind = host.lastIndexOf(':');
                         host = "[" + host.substring(0, ind) + "]" +
                             host.substring(ind);
-                    } else if (tokens == 8 && host.indexOf("::") == -1) {
+                    } else if (tokens == 8 && !host.contains("::")) {
                         // IPv6 address only, not followed by port
                         host = "[" + host + "]";
                     } else {

src/java.base/share/classes/jdk/internal/jrtfs/JrtPath.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2021, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -485,7 +485,7 @@ private static String normalize(String path, int off) {
     // Remove DotSlash(./) and resolve DotDot (..) components
     private String getResolved() {
         int length = path.length();
-        if (length == 0 || (path.indexOf("./") == -1 && path.charAt(length - 1) != '.')) {
+        if (length == 0 || (!path.contains("./") && path.charAt(length - 1) != '.')) {
             return path;
         } else {
             return resolvePath();

src/java.base/share/classes/jdk/internal/loader/URLClassPath.java

@@ -556,11 +556,11 @@ public static void check(URL url) throws IOException {
                     // fallback to checkRead/checkConnect for pre 1.2
                     // security managers
                     if ((perm instanceof java.io.FilePermission) &&
-                        perm.getActions().indexOf("read") != -1) {
+                        perm.getActions().contains("read")) {
                         security.checkRead(perm.getName());
                     } else if ((perm instanceof
                         java.net.SocketPermission) &&
-                        perm.getActions().indexOf("connect") != -1) {
+                        perm.getActions().contains("connect")) {
                         URL locUrl = url;
                         if (urlConnection instanceof JarURLConnection) {
                             locUrl = ((JarURLConnection)urlConnection).getJarFileURL();
@@ -1233,7 +1233,7 @@ Resource getResource(final String name, boolean check) {
                     URLClassPath.check(url);
 
                 final File file;
-                if (name.indexOf("..") != -1) {
+                if (name.contains("..")) {
                     file = (new File(dir, name.replace('/', File.separatorChar)))
                           .getCanonicalFile();
                     if ( !((file.getPath()).startsWith(dir.getPath())) ) {

src/java.base/share/classes/sun/net/www/http/HttpCapture.java

@@ -157,7 +157,7 @@ public static HttpCapture getCapture(java.net.URL url) {
             if (p.matcher(s).find()) {
                 String f = capFiles.get(i);
                 File fi;
-                if (f.indexOf("%d") >= 0) {
+                if (f.contains("%d")) {
                     java.util.Random rand = new java.util.Random();
                     do {
                         String f2 = f.replace("%d", Integer.toString(rand.nextInt()));

src/java.base/share/classes/sun/net/www/protocol/https/HttpsClient.java

@@ -645,7 +645,7 @@ private void checkURLSpoofing(HostnameVerifier hostnameVerifier)
             // ignore
         }
 
-        if ((cipher != null) && (cipher.indexOf("_anon_") != -1)) {
+        if ((cipher != null) && (cipher.contains("_anon_"))) {
             return;
         } else if ((hostnameVerifier != null) &&
                    (hostnameVerifier.verify(host, session))) {

src/java.base/share/classes/sun/security/provider/PolicyFile.java

@@ -723,7 +723,7 @@ private void addGrantEntry(PolicyParser.GrantEntry ge,
                                 + SELF;
                     }
                     // check for self
-                    if (pe.name != null && pe.name.indexOf(SELF) != -1) {
+                    if (pe.name != null && pe.name.contains(SELF)) {
                         // Create a "SelfPermission" , it could be an
                         // an unresolved permission which will be resolved
                         // when implies is called

src/java.base/share/classes/sun/security/rsa/RSAPSSSignature.java

@@ -59,7 +59,7 @@ public class RSAPSSSignature extends SignatureSpi {
     private boolean isDigestEqual(String stdAlg, String givenAlg) {
         if (stdAlg == null || givenAlg == null) return false;
 
-        if (givenAlg.indexOf("-") != -1) {
+        if (givenAlg.contains("-")) {
             return stdAlg.equalsIgnoreCase(givenAlg);
         } else {
             if (stdAlg.equals("SHA-1")) {

src/java.base/share/classes/sun/security/rsa/RSAUtil.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018, 2021, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -25,7 +25,6 @@
 
 package sun.security.rsa;
 
-import java.io.IOException;
 import java.security.*;
 import java.security.spec.*;
 import sun.security.util.ObjectIdentifier;
@@ -61,9 +60,9 @@ public static KeyType lookup(String name) throws ProviderException {
 
             // match loosely in order to work with 3rd party providers which
             // may not follow the standard names
-            if (name.indexOf("PSS") != -1) {
+            if (name.contains("PSS")) {
                 return PSS;
-            } else if (name.indexOf("RSA") != -1) {
+            } else if (name.contains("RSA")) {
                 return RSA;
             } else { // no match
                 throw new ProviderException("Unsupported algorithm " + name);
@@ -151,7 +150,7 @@ public static Object[] getTypeAndParamSpec(AlgorithmId algid)
         } catch (ProviderException pe) {
             // accommodate RSA keys encoded with various RSA signature oids
             // for backward compatibility
-            if (algName.indexOf("RSA") != -1) {
+            if (algName.contains("RSA")) {
                 result[0] = KeyType.RSA;
             } else {
                 // pass it up

src/java.base/share/classes/sun/security/tools/keytool/Main.java

@@ -1471,10 +1471,10 @@ private void doGenCert(String alias, String sigAlgName, InputStream in, PrintStr
             if (s == null) break;
             // OpenSSL does not use NEW
             //if (s.startsWith("-----BEGIN NEW CERTIFICATE REQUEST-----")) {
-            if (s.startsWith("-----BEGIN") && s.indexOf("REQUEST") >= 0) {
+            if (s.startsWith("-----BEGIN") && s.contains("REQUEST")) {
                 canRead = true;
             //} else if (s.startsWith("-----END NEW CERTIFICATE REQUEST-----")) {
-            } else if (s.startsWith("-----END") && s.indexOf("REQUEST") >= 0) {
+            } else if (s.startsWith("-----END") && s.contains("REQUEST")) {
                 break;
             } else if (canRead) {
                 sb.append(s);

src/java.base/share/classes/sun/security/util/Debug.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1998, 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1998, 2021, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -161,10 +161,10 @@ public static boolean isOn(String option)
         if (args == null)
             return false;
         else {
-            if (args.indexOf("all") != -1)
+            if (args.contains("all"))
                 return true;
             else
-                return (args.indexOf(option) != -1);
+                return (args.contains(option));
         }
     }
 

src/java.base/share/classes/sun/security/util/SignatureUtil.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018, 2021, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -54,7 +54,7 @@ public class SignatureUtil {
      *      form of an OID, or the OID value if no match is found.
      */
     private static String checkName(String algName) {
-        if (algName.indexOf(".") == -1) {
+        if (!algName.contains(".")) {
             return algName;
         } else {
             // convert oid to String
@@ -100,7 +100,7 @@ public static AlgorithmParameterSpec getParamSpec(String sigName,
             // AlgorithmParameters.getAlgorithm() may returns oid if it's
             // created during DER decoding. Convert to use the standard name
             // before passing it to RSAUtil
-            if (params.getAlgorithm().indexOf(".") != -1) {
+            if (params.getAlgorithm().contains(".")) {
                 try {
                     params = createAlgorithmParameters(sigName,
                         params.getEncoded());
@@ -109,9 +109,9 @@ public static AlgorithmParameterSpec getParamSpec(String sigName,
                 }
             }
 
-            if (sigName.indexOf("RSA") != -1) {
+            if (sigName.contains("RSA")) {
                 paramSpec = RSAUtil.getParamSpec(params);
-            } else if (sigName.indexOf("ECDSA") != -1) {
+            } else if (sigName.contains("ECDSA")) {
                 try {
                     paramSpec = params.getParameterSpec(ECParameterSpec.class);
                 } catch (Exception e) {
@@ -141,11 +141,11 @@ public static AlgorithmParameterSpec getParamSpec(String sigName,
 
         if (paramBytes != null) {
             sigName = checkName(sigName).toUpperCase(Locale.ENGLISH);
-            if (sigName.indexOf("RSA") != -1) {
+            if (sigName.contains("RSA")) {
                 AlgorithmParameters params =
                     createAlgorithmParameters(sigName, paramBytes);
                 paramSpec = RSAUtil.getParamSpec(params);
-            } else if (sigName.indexOf("ECDSA") != -1) {
+            } else if (sigName.contains("ECDSA")) {
                 try {
                     Provider p = Signature.getInstance(sigName).getProvider();
                     paramSpec = ECUtil.getECParameterSpec(p, paramBytes);

src/java.base/share/classes/sun/security/x509/AlgorithmId.java

@@ -520,7 +520,7 @@ private static ObjectIdentifier algOID(String name) throws IOException {
         }
 
         // unknown algorithm oids
-        if (name.indexOf(".") == -1) {
+        if (!name.contains(".")) {
             // see if there is a matching oid string alias mapping from
             // 3rd party providers
             name = name.toUpperCase(Locale.ENGLISH);

src/java.base/share/classes/sun/util/locale/LocaleMatcher.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2021, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -83,7 +83,7 @@ public static List<String> filterTags(List<LanguageRange> priorityList,
             for (LanguageRange lr : priorityList) {
                 String range = lr.getRange();
                 if (range.startsWith("*-")
-                    || range.indexOf("-*") != -1) { // Extended range
+                    || range.contains("-*")) { // Extended range
                     if (mode == AUTOSELECT_FILTERING) {
                         return filterExtended(priorityList, tags);
                     } else if (mode == MAP_EXTENDED_RANGES) {

src/java.base/unix/classes/sun/net/www/protocol/jar/JarFileFactory.java

@@ -203,11 +203,11 @@ private JarFile getCachedJarFile(URL url) {
                         // fallback to checkRead/checkConnect for pre 1.2
                         // security managers
                         if ((perm instanceof java.io.FilePermission) &&
-                            perm.getActions().indexOf("read") != -1) {
+                            perm.getActions().contains("read")) {
                             sm.checkRead(perm.getName());
                         } else if ((perm instanceof
                             java.net.SocketPermission) &&
-                            perm.getActions().indexOf("connect") != -1) {
+                            perm.getActions().contains("connect")) {
                             sm.checkConnect(url.getHost(), url.getPort());
                         } else {
                             throw se;

src/java.base/windows/classes/sun/net/www/protocol/jar/JarFileFactory.java

@@ -226,11 +226,11 @@ private JarFile getCachedJarFile(URL url) {
                         // fallback to checkRead/checkConnect for pre 1.2
                         // security managers
                         if ((perm instanceof java.io.FilePermission) &&
-                            perm.getActions().indexOf("read") != -1) {
+                            perm.getActions().contains("read")) {
                             sm.checkRead(perm.getName());
                         } else if ((perm instanceof
                             java.net.SocketPermission) &&
-                            perm.getActions().indexOf("connect") != -1) {
+                            perm.getActions().contains("connect")) {
                             sm.checkConnect(url.getHost(), url.getPort());
                         } else {
                             throw se;