cleanup - use contains instead of indexOf

h2/src/main/org/h2/engine/ConnectionInfo.java

@@ -376,10 +376,7 @@ public class ConnectionInfo implements Cloneable {
         if (nameNormalized == null) {
             if (!SysProperties.IMPLICIT_RELATIVE_PATH) {
                 if (!FileUtils.isAbsolute(name)) {
-                    if (name.indexOf("./") < 0 &&
-                            name.indexOf(".\\") < 0 &&
-                            name.indexOf(":/") < 0 &&
-                            name.indexOf(":\\") < 0) {
+                    if (!name.contains("./") && !name.contains(".\\") && !name.contains(":/") && !name.contains(":\\")) {
                         // the name could start with "./", or
                         // it could start with a prefix such as "nio:./"
                         // for Windows, the path "\test" is not considered

h2/src/main/org/h2/engine/Session.java

@@ -930,7 +930,7 @@ public class Session extends SessionWithState {
                 if (lockMode != Constants.LOCK_MODE_OFF &&
                         !database.isMultiVersion()) {
                     TableType tableType = log.getTable().getTableType();
-                    if (locks.indexOf(log.getTable()) < 0
+                    if (!locks.contains(log.getTable())
                             && TableType.TABLE_LINK != tableType
                             && TableType.EXTERNAL_TABLE_ENGINE != tableType) {
                         DbException.throwInternalError("" + tableType);

h2/src/main/org/h2/security/CipherFactory.java

@@ -389,10 +389,8 @@ public class CipherFactory {
     private static String[] enableAnonymous(String[] enabled, String[] supported) {
         LinkedHashSet<String> set = new LinkedHashSet<>();
         for (String x : supported) {
-            if (!x.startsWith("SSL") &&
-                    x.indexOf("_anon_") >= 0 &&
-                    (x.indexOf("_AES_") >= 0 || x.indexOf("_3DES_") >= 0) &&
-                    x.indexOf("_SHA") >= 0) {
+            if (!x.startsWith("SSL") && x.contains("_anon_") &&
+                    (x.contains("_AES_") || x.contains("_3DES_")) && x.contains("_SHA")) {
                 set.add(x);
             }
         }

h2/src/main/org/h2/store/fs/FilePathNioMapped.java

@@ -223,7 +223,7 @@ class FileNioMapped extends FileBase {
                 file.setLength(newLength);
                 break;
             } catch (IOException e) {
-                if (i > 16 || e.toString().indexOf("user-mapped section open") < 0) {
+                if (i > 16 || !e.toString().contains("user-mapped section open")) {
                     throw e;
                 }
             }

h2/src/main/org/h2/table/Table.java

@@ -901,7 +901,7 @@ public abstract class Table extends SchemaObjectBase {
      * @param constraint the constraint to add
      */
     public void addConstraint(Constraint constraint) {
-        if (constraints == null || constraints.indexOf(constraint) < 0) {
+        if (constraints == null || !constraints.contains(constraint)) {
             constraints = add(constraints, constraint);
         }
     }

h2/src/main/org/h2/tools/Console.java

@@ -356,7 +356,7 @@ ShutdownHandler {
             System.gc();
             // Mac OS X: Console tool process did not stop on exit
             String os = System.getProperty("os.name", "generic").toLowerCase(Locale.ENGLISH);
-            if (os.indexOf("mac") >= 0) {
+            if (os.contains("mac")) {
                 for (Thread t : Thread.getAllStackTraces().keySet()) {
                     if (t.getName().startsWith("AWT-")) {
                         t.interrupt();