JDBC Driver (HELP NEEDED URGENTLY)
Hi, I'm a student who has a project to be done on java.
I would like to use access or some other db tt is plafform independence.
However, I do not know of such a dbms system. Can someone help me by telling me with access can be used on other plafform or there is a better dbms out there?
Also , is there any way the client can just do installation without using jdbc to odbc bridge as the installion of the application should be easy and do not require the client to do install addition stuff or trouble themselve over the installtion of the software. Your help is greatly needed Thank you.
I assume you meant "db that is platform independent."
Try http://postgresql.org or http://mysql.org. Both
are free, open source and well supported. And nearly
anything is 'better' than Access. Not sure about the
second part of your query.Message:
Thanks for the tip man. The second problem i have is that i m trying to create a program that run on stand alone PC . It must be able to access a database. However, using the odbc bridge means that it is not plafform indepence while is one of the aim i have for the program. Is it possible to find a driver that dont need to the odbc and can run on standalone PC without a server between there?
thanks you for all your help!!!
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"com.mysql.jdbc.PacketTooBigException": Help needed urgently
hi,
I am using mm.mysql j/connector ver 3.0.6 and MYSQL server version 4.0.
Max_allowed packet= 8MB at the server side
I am getting PacketTooBigException when i am trying to update a particular column.
What should i do.
Any help will be greatly appreciated!!!the driver uses a 64 k max packet size by default. it is supposed to change this as neccessary upon connection but perhaps that is failing?
below is the 3.0.7 connection code that i have slightly modified for you so that it prints out the connection properties after they have been initialized so that you can see what they are.
try it out and i hope you find this helpful.
Copyright (C) 2002 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
/*Slight Modification by Max Stocker April 29, 2003 to trace what the connection values get initialized to. */
package com.mysql.jdbc;
import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import java.io.UnsupportedEncodingException;
import java.math.BigDecimal;
import java.net.URL;
import java.sql.Clob;
import java.sql.Date;
import java.sql.ParameterMetaData;
import java.sql.Ref;
import java.sql.SQLException;
import java.sql.Savepoint;
import java.sql.Time;
import java.sql.Timestamp;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.StringTokenizer;
import java.util.TimeZone;
* A Connection represents a session with a specific database. Within the
* context of a Connection, SQL statements are executed and results are
* returned.
* <P>A Connection's database is able to provide information describing
* its tables, its supported SQL grammar, its stored procedures, the
* capabilities of this connection, etc. This information is obtained
* with the getMetaData method.
* @see java.sql.Connection
* @author Mark Matthews
* @version $Id: Connection.java,v 1.31.2.19 2003/03/28 22:42:24 mmatthew Exp $
public class Connection implements java.sql.Connection {
// The command used to "ping" the database.
// Newer versions of MySQL server have a ping() command,
// but this works for everything
private static final String PING_COMMAND = "SELECT 1";
* Map mysql transaction isolation level name to
* java.sql.Connection.TRANSACTION_XXX
private static Map mapTransIsolationName2Value = null;
* The mapping between MySQL charset names
* and Java charset names.
* Initialized by loadCharacterSetMapping()
private static Map charsetMap;
* Table of multi-byte charsets.
* Initialized by loadCharacterSetMapping()
private static Map multibyteCharsetsMap;
* Default socket factory classname
private static final String DEFAULT_SOCKET_FACTORY = StandardSocketFactory.class
.getName();
static {
loadCharacterSetMapping();
mapTransIsolationName2Value = new HashMap(8);
mapTransIsolationName2Value.put("READ-UNCOMMITED",
new Integer(TRANSACTION_READ_UNCOMMITTED));
mapTransIsolationName2Value.put("READ-UNCOMMITTED",
new Integer(TRANSACTION_READ_UNCOMMITTED));
mapTransIsolationName2Value.put("READ-COMMITTED",
new Integer(TRANSACTION_READ_COMMITTED));
mapTransIsolationName2Value.put("REPEATABLE-READ",
new Integer(TRANSACTION_REPEATABLE_READ));
mapTransIsolationName2Value.put("SERIALIZABLE",
new Integer(TRANSACTION_SERIALIZABLE));
* Internal DBMD to use for various database-version
* specific features
private DatabaseMetaData dbmd = null;
* The list of host(s) to try and connect to
private List hostList = null;
* A map of statements that have had setMaxRows() called on them
private Map statementsUsingMaxRows;
* The I/O abstraction interface (network conn to
* MySQL server
private MysqlIO io = null;
* Mutex
private final Object mutex = new Object();
* The driver instance that created us
private NonRegisteringDriver myDriver;
* The map of server variables that we retrieve
* at connection init.
private Map serverVariables = null;
* Properties for this connection specified by user
private Properties props = null;
* The database we're currently using
* (called Catalog in JDBC terms).
private String database = null;
* If we're doing unicode character conversions,
* what encoding do we use?
private String encoding = null;
* The hostname we're connected to
private String host = null;
* The JDBC URL we're using
private String myURL = null;
* The password we used
private String password = null;
* Classname for socket factory
private String socketFactoryClassName = null;
* The user we're connected as
private String user = null;
* The timezone of the server
private TimeZone serverTimezone = null;
* Allow LOAD LOCAL INFILE (defaults to true)
private boolean allowLoadLocalInfile = true;
* Are we in autoCommit mode?
private boolean autoCommit = true;
* Should we capitalize mysql types
private boolean capitalizeDBMDTypes = false;
* Should we continue processing batch commands if
* one fails. The JDBC spec allows either way, so
* we let the user choose
private boolean continueBatchOnError = true;
* Should we do unicode character conversions?
private boolean doUnicode = false;
* Are we failed-over to a non-master host
private boolean failedOver = false;
/** Does the server suuport isolation levels? */
private boolean hasIsolationLevels = false;
* Does this version of MySQL support quoted identifiers?
private boolean hasQuotedIdentifiers = false;
// This is for the high availability :) routines
private boolean highAvailability = false;
* Has this connection been closed?
private boolean isClosed = true;
* Should we tell MySQL that we're an interactive client?
private boolean isInteractiveClient = false;
* Is the server configured to use lower-case
* table names only?
private boolean lowerCaseTableNames = false;
* Has the max-rows setting been changed from
* the default?
private boolean maxRowsChanged = false;
* Do we expose sensitive information in exception
* and error messages?
private boolean paranoid = false;
* Should we do 'extra' sanity checks?
private boolean pedantic = false;
* Are we in read-only mode?
private boolean readOnly = false;
/** Do we relax the autoCommit semantics? (For enhydra, for example) */
private boolean relaxAutoCommit = false;
* Do we need to correct endpoint rounding errors
private boolean strictFloatingPoint = false;
* Do we check all keys for updatable result sets?
private boolean strictUpdates = true;
/** Are transactions supported by the MySQL server we are connected to? */
private boolean transactionsSupported = false;
* Has ANSI_QUOTES been enabled on the server?
private boolean useAnsiQuotes = false;
* Should we use compression?
private boolean useCompression = false;
* Can we use the "ping" command rather than a
* query?
private boolean useFastPing = false;
* Should we tack on @hostname in DBMD.getTable/ColumnPrivileges()?
private boolean useHostsInPrivileges = true;
* Should we use SSL?
private boolean useSSL = false;
* Should we use stream lengths in prepared statements?
* (true by default == JDBC compliant)
private boolean useStreamLengthsInPrepStmts = true;
* Should we use timezone information?
private boolean useTimezone = false;
/** Should we return PreparedStatements for UltraDev's stupid bug? */
private boolean useUltraDevWorkAround = false;
private double initialTimeout = 2.0D;
* How many hosts are in the host list?
private int hostListSize = 0;
* isolation level
private int isolationLevel = java.sql.Connection.TRANSACTION_READ_COMMITTED;
* The largest packet we can send (changed
* once we know what the server supports, we
* get this at connection init).
private int maxAllowedPacket = 65536;
private int maxReconnects = 3;
* The max rows that a result set can contain.
* Defaults to -1, which according to the JDBC
* spec means "all".
private int maxRows = -1;
private int netBufferLength = 16384;
* The port number we're connected to
* (defaults to 3306)
private int port = 3306;
* How many queries should we wait before we try to re-connect
* to the master, when we are failing over to replicated hosts
* Defaults to 50
private int queriesBeforeRetryMaster = 50;
* What should we set the socket timeout to?
private int socketTimeout = 0; // infinite
* When did the last query finish?
private long lastQueryFinishedTime = 0;
* When did the master fail?
private long masterFailTimeMillis = 0L;
* Number of queries we've issued since the master
* failed
private long queriesIssuedFailedOver = 0;
* How many seconds should we wait before retrying to connect
* to the master if failed over? We fall back when either
* queriesBeforeRetryMaster or secondsBeforeRetryMaster is
* reached.
private long secondsBeforeRetryMaster = 30L;
* The type map for UDTs (not implemented, but used by
* some third-party vendors, most notably IBM WebSphere)
private Map typeMap;
* Ignore non-transactional table warning for rollback?
private boolean ignoreNonTxTables = false;
* Creates a connection to a MySQL Server.
* @param host the hostname of the database server
* @param port the port number the server is listening on
* @param info a Properties[] list holding the user and password
* @param database the database to connect to
* @param url the URL of the connection
* @param d the Driver instantation of the connection
* @exception java.sql.SQLException if a database access error occurs
Connection(String host, int port, Properties info, String database,
String url, NonRegisteringDriver d) throws java.sql.SQLException {
if (Driver.TRACE) {
Object[] args = { host, new Integer(port), info, database, url, d };
Debug.methodCall(this, "constructor", args);
this.serverVariables = new HashMap();
hostList = new ArrayList();
if (host == null) {
this.host = "localhost";
hostList.add(this.host);
} else if (host.indexOf(",") != -1) {
// multiple hosts separated by commas (failover)
StringTokenizer hostTokenizer = new StringTokenizer(host, ",", false);
while (hostTokenizer.hasMoreTokens()) {
hostList.add(hostTokenizer.nextToken().trim());
} else {
this.host = host;
hostList.add(this.host);
hostListSize = hostList.size();
this.port = port;
if (database == null) {
throw new SQLException("Malformed URL '" + url + "'.", "S1000");
this.database = database;
this.myURL = url;
this.myDriver = d;
this.user = info.getProperty("user");
this.password = info.getProperty("password");
if ((this.user == null) || this.user.equals("")) {
this.user = "nobody";
if (this.password == null) {
this.password = "";
this.props = info;
initializeDriverProperties(info);
if (Driver.DEBUG) {
System.out.println("Connect: " + this.user + " to " + this.database);
try {
createNewIO(false);
this.dbmd = new DatabaseMetaData(this, this.database);
} catch (java.sql.SQLException ex) {
cleanup();
// don't clobber SQL exceptions
throw ex;
} catch (Exception ex) {
cleanup();
StringBuffer mesg = new StringBuffer();
if (!useParanoidErrorMessages()) {
mesg.append("Cannot connect to MySQL server on ");
mesg.append(this.host);
mesg.append(":");
mesg.append(this.port);
mesg.append(".\n\n");
mesg.append("Make sure that there is a MySQL server ");
mesg.append("running on the machine/port you are trying ");
mesg.append(
"to connect to and that the machine this software is "
+ "running on ");
mesg.append("is able to connect to this host/port "
+ "(i.e. not firewalled). ");
mesg.append(
"Also make sure that the server has not been started "
+ "with the --skip-networking ");
mesg.append("flag.\n\n");
} else {
mesg.append("Unable to connect to database.");
mesg.append("Underlying exception: \n\n");
mesg.append(ex.getClass().getName());
throw new java.sql.SQLException(mesg.toString(), "08S01");
* If a connection is in auto-commit mode, than all its SQL
* statements will be executed and committed as individual
* transactions. Otherwise, its SQL statements are grouped
* into transactions that are terminated by either commit()
* or rollback(). By default, new connections are in auto-
* commit mode. The commit occurs when the statement completes
* or the next execute occurs, whichever comes first. In the
* case of statements returning a ResultSet, the statement
* completes when the last row of the ResultSet has been retrieved
* or the ResultSet has been closed. In advanced cases, a single
* statement may return multiple results as well as output parameter
* values. Here the commit occurs when all results and output param
* values have been retrieved.
* <p><b>Note:</b> MySQL does not support transactions, so this
* method is a no-op.
* @param autoCommit - true enables auto-commit; false disables it
* @exception java.sql.SQLException if a database access error occurs
public void setAutoCommit(boolean autoCommit) throws java.sql.SQLException {
if (Driver.TRACE) {
Object[] args = { new Boolean(autoCommit) };
Debug.methodCall(this, "setAutoCommit", args);
checkClosed();
if (this.transactionsSupported) {
// this internal value must be set first as failover depends on it
// being set to true to fail over (which is done by most
// app servers and connection pools at the end of
// a transaction), and the driver issues an implicit set
// based on this value when it (re)-connects to a server
// so the value holds across connections
this.autoCommit = autoCommit;
String sql = "SET autocommit=" + (autoCommit ? "1" : "0");
execSQL(sql, -1, this.database);
} else {
if ((autoCommit == false) && (this.relaxAutoCommit == false)) {
throw new SQLException("MySQL Versions Older than 3.23.15 "
+ "do not support transactions", "08003");
} else {
this.autoCommit = autoCommit;
return;
* gets the current auto-commit state
* @return Current state of the auto-commit mode
* @exception java.sql.SQLException (why?)
* @see setAutoCommit
public boolean getAutoCommit() throws java.sql.SQLException {
if (Driver.TRACE) {
Object[] args = new Object[0];
Debug.methodCall(this, "getAutoCommit", args);
Debug.returnValue(this, "getAutoCommit",
new Boolean(this.autoCommit));
return this.autoCommit;
* A sub-space of this Connection's database may be selected by
* setting a catalog name. If the driver does not support catalogs,
* it will silently ignore this request
* <p><b>Note:</b> MySQL's notion of catalogs are individual databases.
* @param catalog the database for this connection to use
* @throws java.sql.SQLException if a database access error occurs
public void setCatalog(String catalog) throws java.sql.SQLException {
if (Driver.TRACE) {
Object[] args = { catalog };
Debug.methodCall(this, "setCatalog", args);
checkClosed();
String quotedId = this.dbmd.getIdentifierQuoteString();
if ((quotedId == null) || quotedId.equals(" ")) {
quotedId = "";
StringBuffer query = new StringBuffer("USE ");
query.append(quotedId);
query.append(catalog);
query.append(quotedId);
execSQL(query.toString(), -1, catalog);
this.database = catalog;
* Return the connections current catalog name, or null if no
* catalog name is set, or we dont support catalogs.
* <p><b>Note:</b> MySQL's notion of catalogs are individual databases.
* @return the current catalog name or null
* @exception java.sql.SQLException if a database access error occurs
public String getCatalog() throws java.sql.SQLException {
if (Driver.TRACE) {
Object[] args = new Object[0];
Debug.methodCall(this, "getCatalog", args);
Debug.returnValue(this, "getCatalog", this.database);
return this.database;
* DOCUMENT ME!
* @return DOCUMENT ME!
public boolean isClosed() {
if (Driver.TRACE) {
Object[] args = new Object[0];
Debug.methodCall(this, "isClosed", args);
Debug.returnValue(this, "isClosed", new Boolean(this.isClosed));
return this.isClosed;
* Returns the character encoding for this Connection
* @return the character encoding for this connection.
public String getEncoding() {
return this.encoding;
* @see Connection#setHoldability(int)
public void setHoldability(int arg0) throws SQLException {
// do nothing
* @see Connection#getHoldability()
public int getHoldability() throws SQLException {
return ResultSet.CLOSE_CURSORS_AT_COMMIT;
* NOT JDBC-Compliant, but clients can use this method
* to determine how long this connection has been idle.
* This time (reported in milliseconds) is updated once
* a query has completed.
* @return number of ms that this connection has
* been idle, 0 if the driver is busy retrieving results.
public long getIdleFor() {
if (this.lastQueryFinishedTime == 0) {
return 0;
} else {
long now = System.currentTimeMillis();
long idleTime = now - this.lastQueryFinishedTime;
return idleTime;
* Should we tell MySQL that we're an interactive client
* @return true if isInteractiveClient was set to true.
public boolean isInteractiveClient() {
return isInteractiveClient;
* A connection's database is able to provide information describing
* its tables, its supported SQL grammar, its stored procedures, the
* capabilities of this connection, etc. This information is made
* available through a DatabaseMetaData object.
* @return a DatabaseMetaData object for this connection
* @exception java.sql.SQLException if a database access error occurs
public java.sql.DatabaseMetaData getMetaData() throws java.sql.SQLException {
checkClosed();
return new DatabaseMetaData(this, this.database);
* You can put a connection in read-only mode as a hint to enable
* database optimizations
* <B>Note:</B> setReadOnly cannot be called while in the middle
* of a transaction
* @param readOnly - true enables read-only mode; false disables it
* @exception java.sql.SQLException if a database access error occurs
public void setReadOnly(boolean readOnly) throws java.sql.SQLException {
if (Driver.TRACE) {
Object[] args = { new Boolean(readOnly) };
Debug.methodCall(this, "setReadOnly", args);
Debug.returnValue(this, "setReadOnly", new Boolean(readOnly));
checkClosed();
this.readOnly = readOnly;
* Tests to see if the connection is in Read Only Mode. Note that
* we cannot really put the database in read only mode, but we pretend
* we can by returning the value of the readOnly flag
* @return true if the connection is read only
* @exception java.sql.SQLException if a database access error occurs
public boolean isReadOnly() throws java.sql.SQLException {
if (Driver.TRACE) {
Object[] args = new Object[0];
Debug.methodCall(this, "isReadOnly", args);
Debug.returnValue(this, "isReadOnly", new Boolean(this.readOnly));
return this.readOnly;
* @see Connection#setSavepoint()
public java.sql.Savepoint setSavepoint() throws SQLException {
throw new NotImplemented();
* @see Connection#setSavepoint(String)
public java.sql.Savepoint setSavepoint(String arg0)
throws SQLException {
throw new NotImplemented();
* DOCUMENT ME!
* @return DOCUMENT ME!
public TimeZone getServerTimezone() {
return this.serverTimezone;
* DOCUMENT ME!
* @param level DOCUMENT ME!
* @throws java.sql.SQLException DOCUMENT ME!
public void setTransactionIsolation(int level) throws java.sql.SQLException {
if (Driver.TRACE) {
Object[] args = { new Integer(level) };
Debug.methodCall(this, "setTransactionIsolation", args);
checkClosed();
if (this.hasIsolationLevels) {
StringBuffer sql = new StringBuffer(
"SET SESSION TRANSACTION ISOLATION LEVEL ");
switch (level) {
case java.sql.Connection.TRANSACTION_NONE:
throw new SQLException("Transaction isolation level "
+ "NONE not supported by MySQL");
case java.sql.Connection.TRANSACTION_READ_COMMITTED:
sql.append("READ COMMITTED");
break;
case java.sql.Connection.TRANSACTION_READ_UNCOMMITTED:
sql.append("READ UNCOMMITTED");
break;
case java.sql.Connection.TRANSACTION_REPEATABLE_READ:
sql.append("REPEATABLE READ");
break;
case java.sql.Connection.TRANSACTION_SERIALIZABLE:
sql.append("SERIALIZABLE");
break;
default:
throw new SQLException("Unsupported transaction "
+ "isolation level '" + level + "'", "S1C00");
execSQL(sql.toString(), -1, this.database);
isolationLevel = level;
} else {
throw new java.sql.SQLException("Transaction Isolation Levels are "
+ "not supported on MySQL versions older than 3.23.36.", "S1C00");
* Get this Connection's current transaction isolation mode.
* @return the current TRANSACTION_* mode value
* @exception java.sql.SQLException if a database access error occurs
public int getTransactionIsolation() throws java.sql.SQLException {
if (Driver.TRACE) {
Object[] args = new Object[0];
Debug.methodCall(this, "getTransactionIsolation", args);
Debug.returnValue(this, "getTransactionIsolation",
new Integer(isolationLevel));
if (this.hasIsolationLevels) {
java.sql.Statement stmt = null;
java.sql.ResultSet rs = null;
try {
stmt = this.createStatement();
String query = null;
if (this.io.versionMeetsMinimum(4, 0, 3)) {
query = "SHOW VARIABLES LIKE 'tx_isolation'";
} else {
query = "SHOW VARIABLES LIKE 'transaction_isolation'";
rs = stmt.executeQuery(query);
if (rs.next()) {
String s = rs.getString(2);
if (s != null) {
Integer intTI = (Integer) mapTransIsolationName2Value.get(s);
if (intTI != null) {
return intTI.intValue();
throw new SQLException("Could not map transaction isolation '" + s + " to a valid JDBC level.", "S1000");
} else {
throw new SQLException("Could not retrieve transaction isolation level from server", "S1000");
} finally {
if (rs != null) {
try {
rs.close();
} catch (Exception ex) {
// ignore
rs = null;
if (stmt != null) {
try {
stmt.close();
} catch (Exception ex) {
// ignore
stmt = null;
return isolationLevel;
* JDBC 2.0
* Install a type-map object as the default type-map for
* this connection
* @param map the type mapping
* @throws SQLException if a database error occurs.
public void setTypeMap(java.util.Map map) throws SQLException {
this.typeMap = map;
* JDBC 2.0
* Get the type-map object associated with this connection.
* By default, the map returned is empty.
* @return the type map
* @throws SQLException if a database error occurs
public synchronized java.util.Map getTypeMap() throws SQLException {
if (this.typeMap == null) {
this.typeMap = new HashMap();
return this.typeMap;
* The first warning reported by calls on this Connection is
* returned.
* <B>Note:</B> Sebsequent warnings will be changed to this
* java.sql.SQLWarning
* @return the first java.sql.SQLWarning or null
* @exception java.sql.SQLException if a database access error occurs
public java.sql.SQLWarning getWarnings() throws java.sql.SQLException {
if (Driver.TRACE) {
Object[] args = new Object[0];
Debug.methodCall(this, "getWarnings", args);
Debug.returnValue(this, "getWarnings", null);
return null;
* Allow use of LOAD LOCAL INFILE?
* @return true if allowLoadLocalInfile was set to true.
public boolean allowLoadLocalInfile() {
return this.allowLoadLocalInfile;
* DOCUMENT ME!
* @return DOCUMENT ME!
public boolean capitalizeDBMDTypes() {
return this.capitalizeDBMDTypes;
* After this call, getWarnings returns null until a new warning
* is reported for this connection.
* @exception java.sql.SQLException if a database access error occurs
public void clearWarnings() throws java.sql.SQLException {
if (Driver.TRACE) {
Object[] args = new Object[0];
Debug.methodCall(this, "clearWarnings", args);
// firstWarning = null;
* In some cases, it is desirable to immediately release a Connection's
* database and JDBC resources instead of waiting for them to be
* automatically released ( -
HT201210 i have an error of no 11. kindly help, needed urgently
i have an error of no 11. kindly help, needed urgently
when i try to upgrage my
iphone 3gs wit 4.1 to new latest 5.1
it gives the erorr of 11. what that mean? Reply as soon as you can !
thnxError -1 may indicate a hardware issue with your device. Follow Troubleshooting security software issues, and restore your device on a different known-good computer. If the errors persist on another computer, the device may need service.
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Some J2ME midlets doubts!! help needed urgently!!!
Hi,
I am currently working in a company where it does wireless technology like WAP and I am assigned a task of creating a screensaver midlet. I have some doubts on the midlets.
1) How do i use a midlet suites? From what I heard from my colleagues & friends, a servlet is needed for midlets to interact with one another. is it true?
2) How do I get the startin midlet to take note the phone is idling so that the screen saver midlet can be called?
Help needed urgently... if there is any source codes for me to refer to would be better... Thanks...
Leonardindicates that MIDlet suites are isolated (on purpose) from each other, so you can't write over another one's address space.
Also, I believe (at least on cell phones) that you have to specifically enter the Java Apps mode; unless you do the app won't execute. If you are in Java apps mode and a call comes in, the cell's OS puts the Java app currently executing on "Pause" mode and switches back to phone mode.
Not sure if you will be able to have a Java app do that automatically.
BTW why do you need a screensaver on an LCD display? Is it really intended to show an advertisement?
Download and real all the docs you can from Sun, once you get over the generic Java deficiencies MIDlet's aren't that hard. -
Load bar at start up, then shut down. HELP NEEDED URGENTLY!!! plss....
Load bar at start up, then shut down. HELP NEEDED URGENTLY!!! plss..
The startup disk may need repairing.
Startup your Mac while holding down the Command + R keys so you can access the built in utiliites to repair the startup disk if necessary or restore OS X using OS X Recovery -
Help needed urgently on a problem..plzzz
hi..this is a linear congruential generator. I have to implement it and i need the execution time for the program.
for your understanding i'm providing an example below.
Xn=(( a* xn-1 )+b) mod m
If X0=7 ; a = 7 ; b =7 ; m=10
Then
X0 = 7
X1 =((7 * 7) + 7))mod 10 = 6
X2 = ((6*7)+7))mod 10 = 9
X3 = ((9*7)+7) mod 10 = 0
X4 = ((0*7)+7) mod 10 = 7
Now since the cycle is being repeated i.e 7 appears again�so the period is 4 coz there are 4 diff nos. i.e 7,6,9,0�..
help required urgently....your help will be appreciated...thankyou..Hi,
I wrote the code so that it catches any cycle (not only the "big" one).
Otherwise it will enter infinite loop...
The time complexity is O(N*logN): it can do at most N iterations (here N is your 'm'), and in each iteration there can be O(log N) comparisons (since I maintain TreeSet).
Interesting issue: is it possible to supply such (x0, a, b, m) tuple such that all possible values from 0 to m-1 will be output? I think no :)
Here is the program:
package recurr;
import java.util.TreeSet;
import java.util.Comparator;
public class Recurrences {
private static long x0, a, b, m;
private static TreeSet theSet;
public static void main(String[] args)
long l0, l1, l2, l3;
try {
x0 = Long.parseLong(args[0]);
a = Long.parseLong(args[1]);
b = Long.parseLong(args[2]);
m = Long.parseLong(args[3]);
} catch(NumberFormatException nfe) {
nfe.printStackTrace();
System.out.println("X[0]: " + x0 + "\n");
long curr = x0;
boolean cut = false;
int i;
// initialize the set
theSet = new TreeSet(new LongComparator());
// we can get at most m distinct values (from 0 to m-1) through recurrences
for(i=1; i <= m; ++i) {
// iterate until we find duplicate
theSet.add(new Long(curr));
curr = recurrence(curr);
if(theSet.contains(new Long(curr))) {
cut = true;
break;
System.out.println("X[" + i + "]: " + curr + "\n");
if(cut) {
System.out.println("Cycle found: the next will come " + curr + "\n");
} else {
System.out.println("No cycle found!");
System.out.println("----------------------------------");
System.out.println("Totally " + (i-1) + " iterations");
private static long recurrence(long previous)
return (a*previous + b)%m;
static class LongComparator implements Comparator
public int compare(Object o1, Object o2)
if(((Long)o1).longValue() < ((Long)o2).longValue()) {
return -1;
} else if(((Long)o1).longValue() > ((Long)o2).longValue()) {
return 1;
} else return 0;
} -
Help needed Urgently- Rebate based on collected amount
Dear all,
I come across scenario while discussiion with client that they require rebate with collection. Details of the requirement are given below:
1. SAP rebates run on billed values & set the accrual in rebate agreement on the rate what we have specified in the rebate agreement. Requirement is that, If i have billed on 1000$ & my accrual value is 100$ with the rate of 10%. If i collected 800$ instead of 1000$, then i need to pay the accrual on the basis of 800$ not on the basis of 1000$. It means i have to adjust accrual amount on the basis of 800$. Conclusion is that i have to pay not 100$ accrual instead less then 100$ on the basis of 800$ which i collected.
2. In month 1 have billed on 5000$, my accrual amount is 500$ with rate of 10%. In the 2nd month i have to bill 1000$ and i have given an discount of 500$, it means my billed value is 500$ and my accrual amount is 50$@10%. In month 3 again i billed 500$ and my accrual amount is 50$@10%.
Requirement is that, when i am going to pay the accrual to client, i should pay correct accrual for which he is entitled for. Means i should pay 100$ accrual not 600$ because i have already given an discount of 500$. Discount which i have given already of 500$ should need to be offest with the first month accrual of 500$. So remaning accrual is 100$.
Great if somebody can help me out for the solutioning of the above requirements.Thanks Ivano,
Somebody has started the conversation.
Let me put my questions again.
This requirement is nothing to do with Payment procedure in the agreement type.
1. In any month if i billed 1000$, so my account receivable would be 1000$. My rebate for that month is 100$ at the rate of 10%. During customer receipt if i collected against my invoice 900$ instead of 1000$, my accrual needs to be corrected 90$ instead of 100$.
I know this can not be fullfilled by standard SAP, by any thoughts on this welcomed.
2. I know Rebate can be settled partially or full settlement by payment method( by cheque, bank transfer, or by credit memo) we have configure in rebate agreement type. But here requirement is totally different.
Here, i need to pay the Rebate as a Discount instead of by cheque or by credit memo. While doing the partial or full settlement system will take into account collected accrual up to that day & apply as a discount to the final bill.
Scenario is like that sometimes customer asked to give us the discount on bill for whatever they accrued so far.
This is again cannot solved by standard SAP, but any thought by any body welcome. We have already thought that we need to enhance the solution.
Solution needed urgently. -
Unable to allocate 27160 bytes.........Help needed urgently
hi
in my production database in getting this error..
ORA-04031: unable to allocate 27160 bytes of shared memory ("shared
pool","unknown object","sga heap(1,0)","session param values")
help needed urgentlyIf you have a program that does not use bind variables you can get this error.
In such cases you do not want to increase the size of the shared pool, but reduce it, and flush regularly. This is a bug in the application and should be fixed to use bind variables.
Another possible workaround is setting cursor_sharing = force, but this can cause other problems, so should only be used as a last resort. If the apps connections can be distinguished by user account or machine, then a log on trigger could be set cursor_sharing just for that application, to limit the damage until the vendor can fix it. -
Hi,
How to check the existance of the table in the database using JDBC?
Thanks in advanceDepends on what DB vendor you are using. For example if your using oracle you could check for a match in "select * from ALL_TABLES".
Another way is to do a query on that table and catch a SQLException.
Exception thrown = no table.
No exception = table exists. -
Help needed urgently to get the values from the jsp page.
hi,
I am badly stuck into this problem.Please help me and find a solution.
I am using ms-access and jsp.
my database structure is as given below:
m_emp_no | from_date | to_date | approver| status |
1002 | 22/9/2008 | 23/9/2008|1003 |pending
1004 | 29/9/2008 | 30/9/2008|1003 |pending
2044 | 15/9/2008 | 16/9/2008|3076 |pending
now this is exactly a leave apply scenario where a page is displayed and the user has to fill in the details to apply leave.then the approver has to approve that leaves so even, he should get the details in his account.
for example here 1003 has to approve leaves for 1002 & 1004.i am able to fetch data from database for the particular approver here is the coding:
<html>
<body>
<h2 align="center"><u><b><span style="background-color: #FFFFFF"><font color="#C0C0C0" face="Comic Sans MS">Leave
Approval Requests</font></span></b></u></h2>
<form method="POST" name="f1" action="update.jsp">
<%
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection con=DriverManager.getConnection("jdbc:odbc:employee_details");
PreparedStatement p=null;
p=con.prepareStatement("select * from emp_leave_application where approver='"+username+"'");
ResultSet r=p.executeQuery();
while(r.next())
%> <table border="1" width="100%" bordercolor="#FFFFFF" bordercolorlight="#FFFFFF" bordercolordark="#FFFFFF">
<tr>
<td width="100%" bgcolor="#999966"><b><u><%=r.getString(2)%></u></b></td>
</tr>
</table>
<table border="1" width="100%" height="171" bordercolor="#FFFFFF" bordercolorlight="#FFFFFF" bordercolordark="#FFFFFF">
<tr>
<td width="100%" height="165" valign="top">
<p align="left"><b>User ID</b> :
<input type="text" name="id" value="<%=r.getString(1)%>" size="4
<b>status</b>:<%=r.getString(5)%</p>
<p><b>Leave From</b> : <%=r.getString(2)%></p>
<p><b>Leave From</b> : <%=r.getString(3)%></p>
<p><b>Approve</b> : <select size="1" name="approved">
<option value="Approved">Approved</option>
<option value="Cancelled">Cancelled</option> </select></p>
<%
con.close();
%>
<table border="1" width="100%" bordercolor="#FFFFFF" bordercolorlight="#FFFFFF" bordercolordark="#FFFFFF">
<tr>
<td width="100%" bgcolor="#999966">
<p align="center"><input type="reset" value="Clear" name="B1">
<input type="submit" value="Submit" name="B2"></td>
</tr>
</table>
</td>
</tr>
</table>
</form>
</body>
</html>{code}
this will display both the rows but when i try to retrieve the values into update.jsp using the code given below it gives me only one value which is the first 1002.
{code}approved=(String)request.getParameter("approved");
id=(String)request.getParameter("id");{code}
but i need both the values to be inserted into the update.jsp only then the approver will be able to approve the leaves individually with respect to the m_emp_no.
please help me out.
thanks in advance.My comments below are all between (((((( and ))))))
<html>
<body>
<h2 align="center"><u><b><span style="background-color: #FFFFFF"><font color="#C0C0C0" face="Comic Sans MS">Leave
Approval Requests</font></span></b></u></h2>
<form method="POST" name="f1" action="update.jsp">
<%
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection con=DriverManager.getConnection("jdbc:odbc:employee_details");
PreparedStatement p=null;
p=con.prepareStatement("select * from emp_leave_application where approver='"+username+"'");
ResultSet r=p.executeQuery();
while(r.next())
%> <table border="1" width="100%" bordercolor="#FFFFFF" bordercolorlight="#FFFFFF" bordercolordark="#FFFFFF">
<tr>
<td width="100%" bgcolor="#999966"><b><u><%=r.getString(2)%></u></b></td>
</tr>
</table>
<table border="1" width="100%" height="171" bordercolor="#FFFFFF" bordercolorlight="#FFFFFF" bordercolordark="#FFFFFF">
<tr>
<td width="100%" height="165" valign="top">
<p align="left"><b>User ID</b> :
<input type="text" name="id" value="<%=r.getString(1)%>" size="4
((((((( in the statement above, name="id" should be changed to something like name="id"<%=ii%>
Where ii is a counter that tells you how many times you have gone through the loop so far.
The reason for this is that each textfield you generate must have a unique name rather than all have the same name
such as 'id'. This change will give them names such as id0, id1, id2. Then when you submit the page, you can uniquely
identify each input textfield.))))))
<b>status</b>:<%=r.getString(5)%</p>
<p><b>Leave From</b> : <%=r.getString(2)%></p>
<p><b>Leave From</b> : <%=r.getString(3)%></p>
<p><b>Approve</b> : <select size="1" name="approved">
(((( the above select also has to have a unique name for each time through the loop. Change it to name="approved"<%=ii%>
<option value="Approved">Approved</option>
<option value="Cancelled">Cancelled</option> </select></p>
<%
con.close();
%>
<table border="1" width="100%" bordercolor="#FFFFFF" bordercolorlight="#FFFFFF" bordercolordark="#FFFFFF">
<tr>
<td width="100%" bgcolor="#999966">
<p align="center"><input type="reset" value="Clear" name="B1">
<input type="submit" value="Submit" name="B2"></td>
</tr>
</table>
</td>
</tr>
</table>
</form>
</body>
</html>
(((((((note you would be better off long term to put your business logic in a servlet and dispatch to the JSP page which will only have the responsiblity to display the data.
Also, connection pooling is better than the above. -
Html to wml conversion help needed urgently
Hello everybody,
I need static HTML to WML code urgently as soon as possible.
Can please somebody help.
Moreover, how to discard the tags in HTML which are not in WML.The problem is that few tags are not mandatory to close.So, what should be the rule of discarding tags?
Please help!!!!
iwapsmshttp://www.google.co.uk/search?q=html+2+wml&start=0&ie=utf-8&oe=utf-8
-
Java Progrramming HELP, Needed Urgently, T hanks
hey guys,
I have this lab I need to be done tomorrow, its been weeks lol of thinking and figuring things out can someone make it work ? Pleaseeeee !
I feel like going out and yelling for help lol I have been trying to figure this out for weeks now.
I am pasting my Lab and My Codes I did so far, And Please I really need this done today at any rate, all help would be kindly appreciated.
A Java program is required that will produce a number of reports based on the data from the Product file. This file contains the product name, cost, quantity and UPC. The file name must be input. Valid data from the file will be loaded into an array.
A menu will provide the following options: (Note there are changes from previous assignment.)
1 Display of all valid product information including extended price and GST including totals sorted by name.
2 Display of all invalid records sorted by name.
3 Search and display a certain product by name.
4 Sort by UPC and use a binary search and display a certain product by UPC. (valid records)
9 Exit.
Processing requirements:
Input the data from a file and load the records into an object array. Use this object array to produce the above reports.
Code a class definition exactly as given in the following UML.
(For specific students: you may code the UPC as an integer but if not numeric throw an exception that is handled in main. Document your choice in your submission).
Product
? Name : String
? UPC : String
? Cost : Real
? Quantity : Integer
+ Product (Name : String, UPC : String, Cost : Real, Quantity : Integer)
+ Calculate Extended Cost() : Real
+ Calculate GST(): Real
Input Record:
Product name: String
UPC: String
Cost: real
Quantity: integer
Output Reports
1. Display of all product information including extended cost and GST including totals of these 3 fields.
Following is a sample of the output required:
************************ Product Cost REPORT ****************************
Product Cost Quantity Extended Cost GST Total Cost
Diamond Necklace 12345678901x 54,321.99 188 10,212,534.12 510,626.71 10,723,160.83
Tissues 98989898989x 1.99 2 3.98 0.20 4.18
TOTALS 10,212,538.10 510,626.91 10,723,165.01
2. Display of all invalid records and the count.
Following is a sample of the output required:
Invalid UPC Records = 1
Count Record
1 Tiara Diamond, 12345678901x, 36020.00, 2
3. Search and display a certain product by name. Display appropriate message if not found.
Following is a sample of the output required:
Enter product name: CrownJewels
CrownJewels 99999999991x 100,000.00 1 100,000.00 5,000.00 $105,000.00
6. Display the product information sorted by name
Following is a sample of the output required:
************************ Product Cost REPORT ****************************
Product Cost Quantity Extended Cost GST Total Cost
CrownJewels 99999999991x 100,000.00 1 100,000.00 5,000.00 $105,000.00
Diamond Necklace 12345678901x 54,321.99 188 10,212,534.12 510,626.71 $10,723,160.83
Pearls 88888888881x 10,000.00 1 10,000.00 500.00 $10,500.00
RubyRing 77777777771x 10,000.00 1 10,000.00 500.00 $10,500.00
Tissues 98989898989x 1.99 2 3.98 0.20 $4.18
TOTALS (complete these values) xxx xxx xxx
Java coding requirements for this assignment
Main methods required
1. Load array with all records. Display exception messages only for records that have invalid data in any of the fields. Return array of valid records and logical size.
2. Validate the UPC. Display each report when requested from the menu.
3. Justify the data in the columns. Right justify numeric fields; left justify the alpha fields.
4. A method for each report required in the menu.
Class methods
5. Use the object method for the extended cost.
6. Use the object method for the GST.
You may use additional methods in the main program but do not add any methods in the class definition.
Use DecimalFormat for rounding.
Create an array to hold the objects. Assume that we only need to process a file of a maximum of 500 records but the file may be larger than 500 records.
A Universal Product Code consists of 12 digits. The first digit (from the left) is the UPC type. The next five digits are the Manufacturer code. The next five digits are the product code which is assigned by the manufacturer. The final digit is the check digit. A person can determine the check digit of a Universal Product Code by doing the following:
Step 1: Sum all of the digits in the odd positions together.
0+4+0+1+5+9 = 19
Step 2: Multiply the sum from Step 1 by 3.
3 * 19 = 57
Step 3: Sum all of the digits in the even positions together.
6+2+0+1+8 = 17
Step 4: Sum together the results from Step 2 and Step 3.
17 + 57 = 74
Step 5: Subtract the sum from the next highest multiple of 10.
80 - 74 = 6 [check digit]
TEST DATA:
Step 1: Create 5 or MORE additional records that will test all conditions. Include these in your documentation. Identify what field is tested in your test data. (Example: error in each field of the record, rounding up, rounding down, valid UPC, invalid UPC, formatting of report, file too large
Step 2: Use the file attached.
GODDDDDDDDDDDDDD lol pasting it made me go crazy,
these are my codes so far, HOwever the problem is ONLY DISPLAY MENU SHOWS, nothing else even though i have enough codes that it can show something,
My codes are as follows:
I am working on Eclipse.
import java.util.Arrays;
import java.util.Scanner;
import java.io.*;
import java.util.*;
import java.io.IOException;
* Name : Sana Ghani
* Date : July 10
public class lab56
public static Scanner file;
public static Scanner parse;
public static Scanner input = new Scanner(System.in);
public static Scanner searchInput = new Scanner(System.in);
public static void main(String[] args) throws Exception
Product1[] validProduct = new Product1[500];
int logicalSize = 0;
int menuChoice=0;
String FileName = getFileName();
displayMenu();
switch(menuChoice)
case 1:
displayAllValidRecords(validProduct, logicalSize);
try
// Open an output stream
OutputStream fout = new FileOutputStream ("myfile.txt");
// Print a line of text
new PrintStream(fout).println ("hello world!");
// Close our output stream
fout.close();
// Catches any error conditions
catch (IOException e)
System.err.println ("Unable to write to file");
System.exit(-1);
break;
case 2:
break;
case 3:
binarySearchByName( validProduct,logicalSize);
break;
case 4:
break;
case 5:
break;
menuChoice = displayMenu();
public static void display(Product1[]validProduct, int logicalSize)throws Exception
String Product, UPC;
double Cost;
int Quantity;
for(int index =0; index<logicalSize; index++)
Product = validProduct[index].GetName();
UPC = validProduct[index].GetUPC();
Cost=validProduct[index].GetCost();
Quantity=validProduct[index].GetQuantity();
System.out.println(Product+"\t\t"+UPC+"\t\t"+Cost+"\t\t"+Quantity);
public static String getFileName()
String fileName;
Scanner input = new Scanner(System.in);
System.out.print("Please enter a file name: ");
fileName = input.next();
return fileName;
public static int displayMenu()
int menuChoice;
boolean validFlag = false;
do
System.out.println("\n\n*************************************");
System.out.println(" Product Display Menu ");
System.out.println("*************************************");
System.out.println("(1)Display All Records");
System.out.println("(2)Display All Invalid Records");
System.out.println("(3)Search by Product Name");
System.out.println("(4)Sort by Product Name");
System.out.println("(5)Exit");
System.out.println("*************************************");
System.out.print("Enter your choice(1-5): ");
menuChoice = input.nextInt();
if ((menuChoice >= 1) && (menuChoice <= 5))
validFlag = true;
if (!validFlag)
System.out.println("You have chosen " + menuChoice + ", " + menuChoice +
" is not valid. Please try again");
}while(!validFlag);
return menuChoice;
public static String loadArray(Product1 [] ValidProduct, String fileName)throws Exception
int logicalSize=0;//will always have to declare
String record;//will always have to declare
String Product, UPC;//variable names from
double Quantity;
double Cost;
Scanner file = new Scanner(new File(fileName));//open
record = file.nextLine();//read a line
record = file.nextLine();//read a line
for(int index = 0; index < ValidProduct.length && file.hasNext(); index++)//check to see if the file has data
record = file.nextLine();
parse = new Scanner(record).useDelimiter(",");
String Name = parse.next();
UPC = parse.next();
Cost = parse.nextDouble();
Quantity=parse.nextDouble();
ValidProduct[index] = new Product1 ( Name, UPC, Cost, (int) Quantity);
// create the object-- call the constructor and pass info
logicalSize++;
return logicalSize+".txt";
public static double roundDouble(double value, int position)
java.math.BigDecimal bd = new java.math.BigDecimal(value);
bd = bd.setScale(position,java.math.BigDecimal.ROUND_UP);
return bd.doubleValue();
* This method will print report about valid records
public static void displayAllRecords( Product1[]valid, int ValidProduct,
Product1[] invalid, int InvalidProduct)
// Print valid records
displayAllValidRecords(valid, ValidProduct);
// Print invalid UPC records
displayAllValidRecords(invalid, InvalidProduct);
public static void displayOneRecord(Product1[]valid, int index)
double extendedCost, GST, SumofGST = 0, // Total Extended Cost
totalCost, SumOfTotalCost = 0; // Total Extended Cost + GST
// Print title
System.out.println(leftJustify("Product", 50) +
leftJustify("UPC", 15) +
rightJustify("Cost", 10) +
rightJustify("Quantity", 5) +
rightJustify("Extended Cost", 15) +
rightJustify("GST", 5) +
rightJustify("Total Cost", 13));
extendedCost = valid[index].CalculateExtendedCost();
extendedCost = roundDouble(extendedCost, 2);
GST = valid[index].CalculateGST();
GST = roundDouble(GST, 2);
totalCost = extendedCost + GST;
totalCost = roundDouble(totalCost, 2);
// justify method ensures all values are of the same size
System.out.println(//leftJustify(i+"",3) + ": " +
leftJustify(valid[index].GetName(), 50) +
leftJustify(valid[index].GetUPC(), 15) +
rightJustify(valid[index].GetCost()+"", 10) +
rightJustify(valid[index].GetQuantity()+"", 5) +
rightJustify(extendedCost+"", 10) +
rightJustify(GST+"", 10) +
rightJustify(totalCost+"", 10));
* This method will print report about valid records
public static void displayAllValidRecords( Product1[]valid, int validCounter)
double extendedCost, sumOfExtendedCost = 0, // Total Extended Cost
GST, sumOfGST = 0, // Total GST
totalCost, sumOfTotalCost = 0; // Total Extended Cost + GST
System.out.println("************************ XYZ Product " +
"Cost REPORT ****************************" +
// Print title
System.out.println(leftJustify("Product", 50) +
leftJustify("UPC", 15) +
rightJustify("Cost", 10) +
rightJustify("Qty", 5) +
rightJustify("Extended Cost", 15) +
rightJustify("GST", 5) +
rightJustify("Total Cost", 13));
// Print Records
for(int i=0; i<validCounter; i++)
extendedCost = valid.CalculateExtendedCost();
extendedCost = roundDouble(extendedCost, 2);
GST = valid[i].CalculateGST();
GST = roundDouble(GST, 2);
totalCost = extendedCost + GST;
totalCost = roundDouble(totalCost, 2);
// justify method ensures all values are of the same size
System.out.println(//leftJustify(i+"",3) + ": " +
leftJustify(valid[i].GetName(), 50) +
leftJustify(valid[i].GetUPC(), 15) +
rightJustify(valid[i].getClass()+"", 10) +
rightJustify(valid[i].GetQuantity()+"", 5) +
rightJustify(extendedCost+"", 10) +
rightJustify(GST+"", 10) +
rightJustify(totalCost+"", 10));
sumOfExtendedCost += extendedCost;
sumOfGST += GST;
sumOfTotalCost += totalCost;
private static void sortByName(Product1 [] ValidProduct, int logicalSize) throws Exception
Product1 temp;
for (int outer = logicalSize-1; outer > 1; outer --)
for (int inner = 0; inner < outer; inner ++)
if (ValidProduct[inner].GetName().compareToIgnoreCase(ValidProduct[inner+1].GetName())>0)
temp = ValidProduct[inner];
ValidProduct[inner] = ValidProduct[inner + 1];
ValidProduct [+ 1] = temp;
public static void binarySearchByName(Product1 [] ValidProduct, int logicalSize)
int high = logicalSize - 1;
int low = 0;
int mid = 0;
int count = 0;
int compare = 0;
boolean found = false;
System.out.print("Enter a product name");
String product = input.nextLine();
while (high >= low && !found)
count += 1;
mid = (high + low) / 2;
compare = ValidProduct[mid].GetName().compareToIgnoreCase(product);
if (compare == 0)
System.out.println("Found: " + ValidProduct[mid].GetName());
found = true;
else if (compare < 0)
low = mid + 1;
else
high = mid - 1;
if (!found)
System.out.println(product + " not found.");
System.out.println(count + " steps");
System.out.println();
public static String leftJustify(String field, int width)
StringBuffer buffer = new StringBuffer(field);
while (buffer.length() < width)
buffer.append(' ');
return buffer.toString();
public static String rightJustify(String field, int width)
StringBuffer buffer = new StringBuffer(field);
while (buffer.length() < width)
buffer.append(' ');
return buffer.toString();
public static void displayValidRecords(Product1 [] ValidProduct, int logicalSize) throws Exception {
long longMAX_POSSIBLE_UPC_CODE = 999999999999L;
// set input stream and get number
Scanner stdin = new Scanner(System.in);
System.out.print("Enter a 12-digit UPC number: ");
long input =stdin.nextLong();
long number = input;
// determine whether number is a possible UPC code
if ((input < 0)|| (input > longMAX_POSSIBLE_UPC_CODE)) {
// not a UPC code
System.out.println(input +"is an invalid UPC code");
else {
// might be a UPC code
// determine digits
int d12 = (int) (number % 10);
number /= 10;
int d11 = (int) (number % 10);
number /= 10;
int d10 = (int) (number % 10);
number /= 10;
int d9 = (int) (number % 10);
number /= 10;
int d8 = (int) (number % 10);
number /= 10;
int d7 = (int) (number % 10);
number /= 10;
int d6 = (int) (number % 10);
number /= 10;
int d5 = (int) (number % 10);
number /= 10;
int d4 = (int) (number % 10);
number /= 10;
int d3 = (int) (number % 10);
number /= 10;
int d2 = (int) (number % 10);
number /= 10;
int d1 = (int) (number % 10);
number /= 10;
// compute sums of first 5 even digits and the odd digits
int m = d2 + d4 d6 d8 + d10;
int n = d1 + d3 d5 d7 + d9 + d11;
// use UPC formula to determine required value for d12
int r = 10 - ((m +3*n) % 10);
// based on r, can test whether number is a UPC code
if (r == d12) {
// is a UPCcode
System.out.println(input+" is a valid UPC code");
else {
// not a UPCcode
System.out.println(input+" is not valid UPC code");
Any help would be great thanks !!
Take care,1) It's your problem that you waited until the last minute before you went for help...not ours. We'll give your problem the same attention as anyone elses...therefore your problem isn't any more urgent than any other problem here.
2) I don't intend on doing your entire assignment. Nor do I intend on reading all of it. If you need help with a specific requirement, then post the information/code relevant to that requirement. I don't know how to help you when you bury the problem inside a 9 mile long essay.
3) Post code in tags so it's formatted and readable. (there's a *code* button up above that makes the tags for you). -
Need to reinstall Acrobat XI - cloud says it's installed - help needed urgently!
i am using osx / adobe creative cloud.
needed to deinstall acrobat XI. did it with app cleaner by mistake.
now acc tells me it is installed and i can not reinstall it again.
help urgently needed!
PROBLEM SOLVED
go to applications/utilities/adobe installers/acrobat XI deinstall (in my case)Hi rbt_11,
Please go to
Applications --> Utilities --> Adobe Installers and check if you have any uninstaller for Acrobat XI.
Incase if you find the uninstaller then run that and uninstall the remnants of this software.
Thanks
Kapil -
Help neede urgently(Problem in adding exponential numbers)
Hi,
Actually i want to add the contents of two files which contains exponential numbers.
i'm not able to add these numbers. Can any one help me?
import java.io.*;
import java.nio.*;
class userFile
public static void main(String[] args) throws IOException
try
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
String s1,s2,s3;
FileReader fr1,fr2;
System.out.println("Enter first file :");
s1=br.readLine();
System.out.println("Enter second file :");
s2=br.readLine();
System.out.println("Enter new file :");
s3=br.readLine();
fr1= new FileReader(s1);
fr2= new FileReader(s2);
BufferedReader fin1=new BufferedReader(fr1);
BufferedReader fin2=new BufferedReader(fr2);
String str1,str2,str3;
double i1,i2,i3;
OutputStream fout=new FileOutputStream(s3);
while((str1=fin1.readLine()) != null)
while((str2=fin2.readLine()) != null)
i1=Float.parseFloat(str1);
System.out.println(i1);
i2=Float.parseFloat(str2);
System.out.println(i2);
i3=i1+i2;
System.out.println("i3=" +i3);
str3 = Float.toString(i3);
byte buf[]=str3.getBytes();
fout.write(buf);
fout.write('\n');
catch(NumberFormatException e)
System.out.println(e);
}I need help urgently.
Thanks in advance.By "exponential number, do you mean one in scientific notation (eg. -1.55743e21) or what?
What do your files look like?
What problem are you encountering? Is an exception being thrown? If so, give us the exact message (copy/paste). Is the results simply not what was expected? If so, give us the input, the expected results and the actual results for us to compare and consider.
Chuck -
HELP NEEDED URGENTLY BY LAME BRAINED IDIOT!!
I have just purchased second hand my Imac G5 running OS X 10.3.5.
I have (stupidly?) erased (sent to waste bin) ALL previously installed data/files from the internal main drive.
Now when i start the machine and attempt to reinstall the original OS disks or do anything I get a major Kernal Panics message.
Message starts unable to find Powerbook 8,1 driver.
Followed by half a screen of text I do not understand.
Message ends with "panic: we are hanging here ..."
A message behind this text reads to restart your system, if not turned off the internal fan does an impression of a Harrier Jump Jet taking off!...makes such a loud noise like it's gonna blow up!!!
I've never used a Mac before do not know the terminology for these systems,don't even really know how to navigate around the screen menus etc.
I have 3 original disks that read Mac OS install disk 1 & Mac OS install disk 2 also iMac G5 additional software & apple hardware test.
I cannot get past paic screen to load these disks.
*It's gonna take a very special person that can translate and make this strategically shaved monkey understand how I can fix this problem.*
*Whoever helps to get me up and running will surely be rewarded in Heaven!!!*
Regards
Rufus Pimpenstein III.Rufus, from one "strategically shaved monkey" to another - welcome to the discussions!
Those kernel panics are probably due to a number of problems, but since you bought your iMac second hand, I would suggest that you do an "erase and install" of the OS and appplications as shown here.
The fans are kicking in because the fan control software cannot be loaded and it is going to the full-bore setting to protect the machine.
If that is what you tried already, then a few other suggestions from Dr. Smoke about resolving those kernel panics.
Make sure that you unplug all USB and FireWire devices - except the keyboard and mouse of course - while doing any further troubleshooting. You want to narrow it down as much as possible.
Be sure to post back here for more help if needed. There are plenty more shaved apes and other simians that can help you here - LOL!
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