Smaller changes (mainly for Android).

h2/src/main/org/h2/command/Parser.java

@@ -429,7 +429,7 @@ public class Parser {
                 throw getSyntaxError();
             }
             if (indexedParameterList != null) {
-                for (int i = 0; i < indexedParameterList.size(); i++) {
+                for (int i = 0, size = indexedParameterList.size(); i < size; i++) {
                     if (indexedParameterList.get(i) == null) {
                         indexedParameterList.set(i, new Parameter(i));
                     }
@@ -844,10 +844,12 @@ public class Parser {
     private Prepared prepare(Session s, String sql, ArrayList<Value> paramValues) {
         Prepared prep = s.prepare(sql);
         ArrayList<Parameter> params = prep.getParameters();
-        for (int i = 0; params != null && i < params.size(); i++) {
+        if (params != null) {
+            for (int i = 0, size = params.size(); i < size; i++) {
                 Parameter p = params.get(i);
                 p.setValue(paramValues.get(i));
             }
+        }
         return prep;
     }
 
@@ -955,11 +957,7 @@ public class Parser {
             if (isSelect()) {
                 Query query = parseSelectUnion();
                 read(")");
-                ArrayList<Parameter> params = New.arrayList();
-                for (int i = 0; i < parameters.size(); i++) {
-                    params.add(parameters.get(i));
-                }
-                query.setParameterList(params);
+                query.setParameterList(New.arrayList(parameters));
                 query.init();
                 Session s;
                 if (createView != null) {
@@ -1404,7 +1402,7 @@ public class Parser {
         int paramIndex = parameters.size();
         Query command = parseSelectUnion();
         ArrayList<Parameter> params = New.arrayList();
-        for (int i = paramIndex; i < parameters.size(); i++) {
+        for (int i = paramIndex, size = parameters.size(); i < size; i++) {
             params.add(parameters.get(i));
         }
         command.setParameterList(params);
@@ -5053,7 +5051,7 @@ public class Parser {
         if ((!Character.isLetter(c) && c != '_') || Character.isLowerCase(c)) {
             return StringUtils.quoteIdentifier(s);
         }
-        for (int i = 0; i < s.length(); i++) {
+        for (int i = 1, length = s.length(); i < length; i++) {
             c = s.charAt(i);
             if ((!Character.isLetterOrDigit(c) && c != '_') || Character.isLowerCase(c)) {
                 return StringUtils.quoteIdentifier(s);

h2/src/main/org/h2/command/Prepared.java

@@ -156,11 +156,13 @@ public abstract class Prepared {
      * @throws SQLException if any parameter has not been set
      */
     protected void checkParameters() {
-        for (int i = 0; parameters != null && i < parameters.size(); i++) {
+        if (parameters != null) {
+            for (int i = 0, size = parameters.size(); i < size; i++) {
                 Parameter param = parameters.get(i);
                 param.checkSet();
             }
         }
+    }
 
     /**
      * Set the command.

h2/src/main/org/h2/command/dml/Merge.java

@@ -85,11 +85,11 @@ public class Merge extends Prepared {
         session.setLastIdentity(ValueLong.get(0));
         if (list.size() > 0) {
             count = 0;
-            for (int x = 0; x < list.size(); x++) {
+            for (int x = 0, size = list.size(); x < size; x++) {
                 setCurrentRowNumber(x + 1);
                 Expression[] expr = list.get(x);
                 Row newRow = table.getTemplateRow();
-                for (int i = 0; i < columns.length; i++) {
+                for (int i = 0, len = columns.length; i < len; i++) {
                     Column c = columns[i];
                     int index = c.getColumnId();
                     Expression e = expr[i];

h2/src/main/org/h2/command/dml/Query.java

@@ -214,8 +214,9 @@ public abstract class Query extends Prepared {
         if (list == null) {
             list = New.arrayList();
         }
-        Value[] params = new Value[list.size()];
-        for (int i = 0; i < list.size(); i++) {
+        int size = list.size();
+        Value[] params = new Value[size];
+        for (int i = 0; i < size; i++) {
             Value v = list.get(i).getParamValue();
             params[i] = v;
         }
@@ -330,7 +331,8 @@ public abstract class Query extends Prepared {
                 }
             } else {
                 String s = e.getSQL();
-                for (int j = 0; expressionSQL != null && j < expressionSQL.size(); j++) {
+                if (expressionSQL != null) {
+                    for (int j = 0, size = expressionSQL.size(); j < size; j++) {
                         String s2 = expressionSQL.get(j);
                         if (s2.equals(s)) {
                             idx = j;
@@ -339,6 +341,7 @@ public abstract class Query extends Prepared {
                         }
                     }
                 }
+            }
             if (!isAlias) {
                 if (mustBeInResult) {
                     throw DbException.get(ErrorCode.ORDER_BY_NOT_IN_RESULT, e.getSQL());
@@ -360,9 +363,10 @@ public abstract class Query extends Prepared {
      * @return the {@link SortOrder} object
      */
     public SortOrder prepareOrder(ArrayList<SelectOrderBy> orderList, int expressionCount) {
-        int[] index = new int[orderList.size()];
-        int[] sortType = new int[orderList.size()];
-        for (int i = 0; i < orderList.size(); i++) {
+        int size = orderList.size();
+        int[] index = new int[size];
+        int[] sortType = new int[size];
+        for (int i = 0; i < size; i++) {
             SelectOrderBy o = orderList.get(i);
             int idx;
             boolean reverse = false;

h2/src/main/org/h2/command/dml/Select.java

@@ -238,7 +238,8 @@ public class Select extends Query {
             return null;
         }
         ArrayList<Index> indexes = topTableFilter.getTable().getIndexes();
-        for (int i = 0; indexes != null && i < indexes.size(); i++) {
+        if (indexes != null) {
+            for (int i = 0, size = indexes.size(); i < size; i++) {
                 Index index = indexes.get(i);
                 if (index.getIndexType().isScan()) {
                     continue;
@@ -247,6 +248,7 @@ public class Select extends Query {
                     return index;
                 }
             }
+        }
         return null;
     }
 
@@ -256,7 +258,7 @@ public class Select extends Query {
         // also check that the first columns in the index are grouped
         boolean[] grouped = new boolean[indexColumns.length];
         outerLoop:
-        for (int i = 0; i < expressions.size(); i++) {
+        for (int i = 0, size = expressions.size(); i < size; i++) {
             if (!groupByExpression[i]) {
                 continue;
             }
@@ -407,7 +409,8 @@ public class Select extends Query {
             return topTableFilter.getTable().getScanIndex(session);
         }
         ArrayList<Index> list = topTableFilter.getTable().getIndexes();
-        for (int i = 0; list != null && i < list.size(); i++) {
+        if (list != null) {
+            for (int i = 0, size = list.size(); i < size; i++) {
                 Index index = list.get(i);
                 if (index.getCreateSQL() == null) {
                     // can't use the scan index
@@ -441,6 +444,7 @@ public class Select extends Query {
                     return index;
                 }
             }
+        }
         return null;
     }
 
@@ -617,6 +621,7 @@ public class Select extends Query {
     }
 
     private void expandColumnList() {
+        // the expressions may change within the loop
         for (int i = 0; i < expressions.size(); i++) {
             Expression expr = expressions.get(i);
             if (!expr.isWildcard()) {
@@ -696,12 +701,14 @@ public class Select extends Query {
         // then 'HAVING' expressions,
         // and 'GROUP BY' expressions at the end
         if (group != null) {
-            groupIndex = new int[group.size()];
-            for (int i = 0; i < group.size(); i++) {
+            int size = group.size();
+            int expSize = expressionSQL.size();
+            groupIndex = new int[size];
+            for (int i = 0; i < size; i++) {
                 Expression expr = group.get(i);
                 String sql = expr.getSQL();
                 int found = -1;
-                for (int j = 0; j < expressionSQL.size(); j++) {
+                for (int j = 0; j < expSize; j++) {
                     String s2 = expressionSQL.get(j);
                     if (s2.equals(sql)) {
                         found = j;
@@ -710,7 +717,7 @@ public class Select extends Query {
                 }
                 if (found < 0) {
                     // special case: GROUP BY a column alias
-                    for (int j = 0; j < expressionSQL.size(); j++) {
+                    for (int j = 0; j < expSize; j++) {
                         Expression e = expressions.get(j);
                         if (sql.equals(e.getAlias())) {
                             found = j;

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

@@ -631,6 +631,7 @@ public class Session extends SessionWithState {
             // MVCC: keep shared locks (insert / update / delete)
             return;
         }
+        // locks is modified in the loop
         for (int i = 0; i < locks.size(); i++) {
             Table t = locks.get(i);
             if (!t.isLockedExclusively()) {
@@ -661,7 +662,7 @@ public class Session extends SessionWithState {
         if (locks.size() > 0) {
             synchronized (database) {
                 // don't use the enhance for loop to safe memory
-                for (int i = 0; i < locks.size(); i++) {
+                for (int i = 0, size = locks.size(); i < size; i++) {
                     Table t = locks.get(i);
                     t.unlock(this);
                 }

h2/src/main/org/h2/expression/Aggregate.java

@@ -548,12 +548,14 @@ public class Aggregate extends Expression {
         if (separator != null && !separator.isEverything(visitor)) {
             return false;
         }
-        for (int i = 0; orderList != null && i < orderList.size(); i++) {
+        if (orderList != null) {
+            for (int i = 0, size = orderList.size(); i < size; i++) {
                 SelectOrderBy o = orderList.get(i);
                 if (!o.expression.isEverything(visitor)) {
                     return false;
                 }
             }
+        }
         return true;
     }
 

h2/src/main/org/h2/expression/ConditionIn.java

@@ -81,7 +81,8 @@ public class ConditionIn extends Condition {
             return left;
         }
         boolean allValuesConstant = true;
-        for (int i = 0; i < valueList.size(); i++) {
+        int size = valueList.size();
+        for (int i = 0; i < size; i++) {
             Expression e = valueList.get(i);
             e = e.optimize(session);
             if (allValuesConstant && !e.isConstant()) {
@@ -92,7 +93,7 @@ public class ConditionIn extends Condition {
         if (constant && allValuesConstant) {
             return ValueExpression.get(getValue(session));
         }
-        if (valueList.size() == 1) {
+        if (size == 1) {
             Expression right = valueList.get(0);
             Expression expr = new Comparison(session, Comparison.EQUAL, left, right);
             expr = expr.optimize(session);

h2/src/main/org/h2/expression/Function.java

@@ -146,7 +146,7 @@ public class Function extends Expression implements FunctionCall {
         // SOUNDEX_INDEX
         String index = "7AEIOUY8HW1BFPV2CGJKQSXZ3DT4L5MN6R";
         char number = 0;
-        for (int i = 0; i < index.length(); i++) {
+        for (int i = 0, length = index.length(); i < length; i++) {
             char c = index.charAt(i);
             if (c < '9') {
                 number = c;

h2/src/main/org/h2/index/IndexCursor.java

@@ -73,7 +73,7 @@ public class IndexCursor implements Cursor {
         inResult = null;
         inResultTested = null;
         // don't use enhanced for loop to avoid creating objects
-        for (int i = 0; i < indexConditions.size(); i++) {
+        for (int i = 0, size = indexConditions.size(); i < size; i++) {
             IndexCondition condition = indexConditions.get(i);
             if (condition.isAlwaysFalse()) {
                 alwaysFalse = true;

h2/src/main/org/h2/index/ViewIndex.java

@@ -195,12 +195,14 @@ public class ViewIndex extends BaseIndex {
             return new ViewCursor(table, result);
         }
         ArrayList<Parameter> paramList = query.getParameters();
-        for (int i = 0; originalParameters != null && i < originalParameters.size(); i++) {
+        if (originalParameters != null) {
+            for (int i = 0, size = originalParameters.size(); i < size; i++) {
                 Parameter orig = originalParameters.get(i);
                 int idx = orig.getIndex();
                 Value value = orig.getValue(session);
                 setParameter(paramList, idx, value);
             }
+        }
         int len;
         if (first != null) {
             len = first.getColumnCount();

h2/src/main/org/h2/result/RowList.java

@@ -92,7 +92,7 @@ public class RowList {
         }
         Data buff = rowBuff;
         initBuffer(buff);
-        for (int i = 0; i < list.size(); i++) {
+        for (int i = 0, size = list.size(); i < size; i++) {
             if (i > 0 && buff.length() > Constants.IO_BUFFER_SIZE) {
                 flushBuffer(buff);
                 initBuffer(buff);

h2/src/main/org/h2/security/SHA256.java

@@ -64,7 +64,7 @@ public class SHA256 {
         String user = userName + "@";
         byte[] buff = new byte[2 * (user.length() + password.length)];
         int n = 0;
-        for (int i = 0; i < user.length(); i++) {
+        for (int i = 0, length = user.length(); i < length; i++) {
             char c = user.charAt(i);
             buff[n++] = (byte) (c >> 8);
             buff[n++] = (byte) c;

h2/src/main/org/h2/store/PageLog.java

@@ -517,8 +517,9 @@ public class PageLog {
         }
         Data buffer = getBuffer();
         buffer.writeByte((byte) FREE_LOG);
-        buffer.writeVarInt(pages.size());
-        for (int i = 0; i < pages.size(); i++) {
+        int size = pages.size();
+        buffer.writeVarInt(size);
+        for (int i = 0; i < size; i++) {
             buffer.writeVarInt(pages.get(i));
         }
         write(buffer);

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

@@ -111,7 +111,7 @@ public class RegularTable extends TableBase {
             row.setSessionId(session.getId());
         }
         try {
-            for (; i < indexes.size(); i++) {
+            for (int size = indexes.size(); i < size; i++) {
                 Index index = indexes.get(i);
                 index.add(session, row);
                 checkRowCount(session, index, 1);

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

@@ -565,7 +565,8 @@ public abstract class Table extends SchemaObjectBase {
         item.setIndex(getScanIndex(session));
         item.cost = item.getIndex().getCost(session, null);
         ArrayList<Index> indexes = getIndexes();
-        for (int i = 1; indexes != null && masks != null && i < indexes.size(); i++) {
+        if (indexes != null && masks != null) {
+            for (int i = 1, size = indexes.size(); i < size; i++) {
                 Index index = indexes.get(i);
                 double cost = index.getCost(session, masks);
                 if (cost < item.cost) {
@@ -573,6 +574,7 @@ public abstract class Table extends SchemaObjectBase {
                     item.setIndex(index);
                 }
             }
+        }
         return item;
     }
 
@@ -583,12 +585,14 @@ public abstract class Table extends SchemaObjectBase {
      */
     public Index findPrimaryKey() {
         ArrayList<Index> indexes = getIndexes();
-        for (int i = 0; indexes != null && i < indexes.size(); i++) {
+        if (indexes != null) {
+            for (int i = 0, size = indexes.size(); i < size; i++) {
                 Index idx = indexes.get(i);
                 if (idx.getIndexType().isPrimaryKey()) {
                     return idx;
                 }
             }
+        }
         return null;
     }
 
@@ -797,7 +801,7 @@ public abstract class Table extends SchemaObjectBase {
     private void fireConstraints(Session session, Row oldRow, Row newRow, boolean before) {
         if (constraints != null) {
             // don't use enhanced for loop to avoid creating objects
-            for (int i = 0; i < constraints.size(); i++) {
+            for (int i = 0, size = constraints.size(); i < size; i++) {
                 Constraint constraint = constraints.get(i);
                 if (constraint.isBefore() == before) {
                     constraint.checkRow(session, this, oldRow, newRow);
@@ -856,11 +860,12 @@ public abstract class Table extends SchemaObjectBase {
     public void setCheckForeignKeyConstraints(Session session, boolean enabled, boolean checkExisting)
             {
         if (enabled && checkExisting) {
-            for (int i = 0; constraints != null && i < constraints.size(); i++) {
-                Constraint c = constraints.get(i);
+            if (constraints != null) {
+                for (Constraint c : constraints) {
                     c.checkExistingData(session);
                 }
             }
+        }
         checkForeignKeyConstraints = enabled;
     }
 
@@ -878,7 +883,8 @@ public abstract class Table extends SchemaObjectBase {
      */
     public Index getIndexForColumn(Column column, boolean first) {
         ArrayList<Index> indexes = getIndexes();
-        for (int i = 1; indexes != null && i < indexes.size(); i++) {
+        if (indexes != null) {
+            for (int i = 1, size = indexes.size(); i < size; i++) {
                 Index index = indexes.get(i);
                 if (index.canGetFirstOrLast()) {
                     int idx = index.getColumnIndex(column);
@@ -887,6 +893,7 @@ public abstract class Table extends SchemaObjectBase {
                     }
                 }
             }
+        }
         return null;
     }
 
@@ -915,14 +922,15 @@ public abstract class Table extends SchemaObjectBase {
      */
     public void removeIndexOrTransferOwnership(Session session, Index index) {
         boolean stillNeeded = false;
-        for (int i = 0; constraints != null && i < constraints.size(); i++) {
-            Constraint cons = constraints.get(i);
+        if (constraints != null) {
+            for (Constraint cons : constraints) {
                 if (cons.usesIndex(index)) {
                     cons.setIndexOwner(index);
                     database.update(session, cons);
                     stillNeeded = true;
                 }
             }
+        }
         if (!stillNeeded) {
             database.removeSchemaObject(session, index);
         }

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

@@ -289,8 +289,9 @@ public class Csv implements SimpleRowSource {
                 return data;
             }
         }
-        StringBuilder buff = new StringBuilder(data.length());
-        for (int i = 0; i < data.length(); i++) {
+        int length = data.length();
+        StringBuilder buff = new StringBuilder(length);
+        for (int i = 0; i < length; i++) {
             char ch = data.charAt(i);
             if (ch == fieldDelimiter || ch == escapeCharacter) {
                 buff.append(escapeCharacter);
@@ -357,7 +358,7 @@ public class Csv implements SimpleRowSource {
     }
 
     private boolean isSimpleColumnName(String columnName) {
-        for (int i = 0; i < columnName.length(); i++) {
+        for (int i = 0, length = columnName.length(); i < length; i++) {
             char ch = columnName.charAt(i);
             if (i == 0) {
                 if (ch != '_' && !Character.isLetter(ch)) {

h2/src/main/org/h2/util/CacheLRU.java

@@ -173,18 +173,19 @@ public class CacheLRU implements Cache {
             }
             Collections.sort(changed);
             int max = maxMemory;
+            int size = changed.size();
             try {
                 // temporary disable size checking,
                 // to avoid stack overflow
                 maxMemory = Integer.MAX_VALUE;
-                for (i = 0; i < changed.size(); i++) {
+                for (i = 0; i < size; i++) {
                     CacheObject rec = changed.get(i);
                     writer.writeBack(rec);
                 }
             } finally {
                 maxMemory = max;
             }
-            for (i = 0; i < changed.size(); i++) {
+            for (i = 0; i < size; i++) {
                 CacheObject rec = changed.get(i);
                 remove(rec.getPos());
                 if (SysProperties.CHECK) {

h2/src/main/org/h2/util/StringUtils.java

@@ -108,9 +108,10 @@ public class StringUtils {
         if (s == null) {
             return "NULL";
         }
-        StringBuilder buff = new StringBuilder(s.length() + 2);
+        int length = s.length();
+        StringBuilder buff = new StringBuilder(length + 2);
         buff.append('\'');
-        for (int i = 0; i < s.length(); i++) {
+        for (int i = 0; i < length; i++) {
             char c = s.charAt(i);
             if (c == '\'') {
                 buff.append(c);
@@ -134,8 +135,9 @@ public class StringUtils {
      * @return the Java representation
      */
     public static String javaEncode(String s) {
-        StringBuilder buff = new StringBuilder(s.length());
-        for (int i = 0; i < s.length(); i++) {
+        int length = s.length();
+        StringBuilder buff = new StringBuilder(length);
+        for (int i = 0; i < length; i++) {
             char c = s.charAt(i);
             switch (c) {
 //            case '\b':
@@ -213,8 +215,9 @@ public class StringUtils {
      * @return the string
      */
     public static String javaDecode(String s) {
-        StringBuilder buff = new StringBuilder(s.length());
-        for (int i = 0; i < s.length(); i++) {
+        int length = s.length();
+        StringBuilder buff = new StringBuilder(length);
+        for (int i = 0; i < length; i++) {
             char c = s.charAt(i);
             if (c == '"') {
                 break;
@@ -449,9 +452,10 @@ public class StringUtils {
      * @return the decoded string
      */
     public static String urlDecode(String encoded) {
-        byte[] buff = new byte[encoded.length()];
+        int length = encoded.length();
+        byte[] buff = new byte[length];
         int j = 0;
-        for (int i = 0; i < encoded.length(); i++) {
+        for (int i = 0; i < length; i++) {
             char ch = encoded.charAt(i);
             if (ch == '+') {
                 buff[j++] = ' ';
@@ -485,18 +489,19 @@ public class StringUtils {
         if (s == null) {
             return null;
         }
-        if (s.length() == 0) {
+        int length = s.length();
+        if (length == 0) {
             return new String[0];
         }
         ArrayList<String> list = New.arrayList();
-        StringBuilder buff = new StringBuilder(s.length());
-        for (int i = 0; i < s.length(); i++) {
+        StringBuilder buff = new StringBuilder(length);
+        for (int i = 0; i < length; i++) {
             char c = s.charAt(i);
             if (c == separatorChar) {
                 String e = buff.toString();
                 list.add(trim ? e.trim() : e);
                 buff.setLength(0);
-            } else if (c == '\\' && i < s.length() - 1) {
+            } else if (c == '\\' && i < length - 1) {
                 buff.append(s.charAt(++i));
             } else {
                 buff.append(c);
@@ -525,7 +530,7 @@ public class StringUtils {
             if (s == null) {
                 s = "";
             }
-            for (int j = 0; j < s.length(); j++) {
+            for (int j = 0, length = s.length(); j < length; j++) {
                 char c = s.charAt(j);
                 if (c == '\\' || c == separatorChar) {
                     buff.append('\\');
@@ -656,8 +661,9 @@ public class StringUtils {
      * @return the escaped text
      */
     public static String xmlText(String text) {
-        StringBuilder buff = new StringBuilder(text.length());
-        for (int i = 0; i < text.length(); i++) {
+        int length = text.length();
+        StringBuilder buff = new StringBuilder(length);
+        for (int i = 0; i < length; i++) {
             char ch = text.charAt(i);
             switch (ch) {
             case '<':
@@ -745,9 +751,10 @@ public class StringUtils {
      * @return the double quoted text
      */
     public static String quoteIdentifier(String s) {
-        StringBuilder buff = new StringBuilder(s.length() + 2);
+        int length = s.length();
+        StringBuilder buff = new StringBuilder(length + 2);
         buff.append('\"');
-        for (int i = 0; i < s.length(); i++) {
+        for (int i = 0; i < length; i++) {
             char c = s.charAt(i);
             if (c == '"') {
                 buff.append(c);

h2/src/main/org/h2/value/DataType.java

@@ -351,7 +351,7 @@ public class DataType {
                 new String[]{"RESULT_SET"},
                 400
         );
-        for (int i = 0; i < TYPES_BY_VALUE_TYPE.size(); i++) {
+        for (int i = 0, size = TYPES_BY_VALUE_TYPE.size(); i < size; i++) {
             DataType dt = TYPES_BY_VALUE_TYPE.get(i);
             if (dt == null) {
                 DbException.throwInternalError("unmapped type " + i);

h2/src/main/org/h2/value/ValueUuid.java

@@ -90,7 +90,7 @@ public class ValueUuid extends Value {
      */
     public static ValueUuid get(String s) {
         long low = 0, high = 0;
-        for (int i = 0, j = 0; i < s.length(); i++) {
+        for (int i = 0, j = 0, length = s.length(); i < length; i++) {
             char c = s.charAt(i);
             if (c >= '0' && c <= '9') {
                 low = (low << 4) | (c - '0');

h2/src/test/org/h2/test/db/TestRunscript.java

@@ -43,11 +43,11 @@ public class TestRunscript extends TestBase implements Trigger {
         Connection conn;
         conn = getConnection("runscript");
         final Statement stat = conn.createStatement();
-        stat.execute("create table test(id int primary key) as select x from system_range(1, 10000)");
+        stat.execute("create table test(id int primary key) as select x from system_range(1, 20000)");
         stat.execute("script simple drop to '"+getBaseDir()+"/backup.sql'");
         stat.execute("set throttle 1000");
         // need to wait a bit (throttle is only used every 50 ms)
-        Thread.sleep(100);
+        Thread.sleep(200);
         final String dir = getBaseDir();
         final SQLException[] ex = new SQLException[1];
         Thread thread;
@@ -62,7 +62,7 @@ public class TestRunscript extends TestBase implements Trigger {
             }
         };
         thread.start();
-        Thread.sleep(100);
+        Thread.sleep(200);
         stat.cancel();
         thread.join();
         e = ex[0];