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java Programming Glossary: fromHow to upload files to server using JSP/Servlet? http://stackoverflow.com/questions/2422468/how-to-upload-files-to-server-using-jsp-servlet and can't upgrade it then you need to extract the value from getPart as follows instead String description getValue request.getPart..
Overriding equals and hashCode in Java http://stackoverflow.com/questions/27581/overriding-equals-and-hashcode-in-java excellent helper classes EqualsBuilder and HashCodeBuilder from the Apache Commons Lang library. An example public class Person..
How to use java.net.URLConnection to fire and handle HTTP requests? http://stackoverflow.com/questions/2793150/how-to-use-java-net-urlconnection-to-fire-and-handle-http-requests headers. You basically need to grab all Set Cookie headers from the response of the login or the first GET request and then.. if you're using Firefox 3.6.3. Use the User Agent string from a recent browser . Error handling If the HTTP response code.. HTML If all you want is parsing and extracting data from HTML then better use a HTML parser like Jsoup What are the pros..
How do servlets work? Instantiation, session variables and multithreading http://stackoverflow.com/questions/3106452/how-do-servlets-work-instantiation-session-variables-and-multithreading as setting headers and the body usually with HTML content from a JSP file . When the HTTP response is committed and finished.. its value the session ID to get the associated HttpSession from server's memory. The HttpSession lives until it has not been..
How to avoid Java Code in JSP-Files? http://stackoverflow.com/questions/3177733/how-to-avoid-java-code-in-jsp-files to read and maintain helps to separate business logic from presentation logic and will make your pages easier to evolve.. pattern to reduce coupling between the presentation tier from the business logic JSP scriptlets should not be used for writing.. to transform data also called value objects returned from processing the client's requests into a proper client ready..
JSTL in JSF2 Facelets… makes sense? http://stackoverflow.com/questions/3342984/jstl-in-jsf2-facelets-makes-sense and JSTL tags doesn't run in sync as you'd expect from the coding. You can visualize it as follows JSTL runs from top.. from the coding. You can visualize it as follows JSTL runs from top to bottom first producing the JSF component tree then it's.. the JSF component tree then it's JSF's turn to run from top to bottom again producing the HTML output. This may lead..
How do I write a correct micro-benchmark in Java? http://stackoverflow.com/questions/504103/how-do-i-write-a-correct-micro-benchmark-in-java improve this question Tips about writing micro benchmarks from the creators of Java HotSpot Rule 0 Read a reputable paper on.. A good one is Brian Goetz 2005 . Do not expect too much from micro benchmarks they measure only a limited range of JVM performance.. warmup phases so you can verify that there is no output from Rule 2 during the timing phase. Rule 3 Be aware of the difference..
The Use of Multiple JFrames, Good/Bad Practice? http://stackoverflow.com/questions/9554636/the-use-of-multiple-jframes-good-bad-practice an application which displays images and plays sounds from a database. I'm trying to decide whether to use a separate JFrame.. to use a separate JFrame to add Images to the Database from the GUI. I'm just wondering whether it is good practice to use..
Sort on a string that may contain a number http://stackoverflow.com/questions/104599/sort-on-a-string-that-may-contain-a-number share improve this question The Alphanum Algorithm From the website People sort strings with numbers differently than..
What's Java Hybrid - Applet + Application? http://stackoverflow.com/questions/12449889/whats-java-hybrid-applet-application Java Hybrid Applet Application And how can I write one From comments to my reply this followed What we had in the old days..
How to really read text file from classpath in Java http://stackoverflow.com/questions/1464291/how-to-really-read-text-file-from-classpath-in-java the same classloader you should be able to use either of From ClassLoader all paths are absolute already there's no context.. .getClassLoader .getResourceAsStream SomeTextFile.txt From Class the path is relative to the package of the class unless..
What to learn for making Java web applications in Java EE 6? [closed] http://stackoverflow.com/questions/1960280/what-to-learn-for-making-java-web-applications-in-java-ee-6 like this Beginning Java EE 6 Platform with GlassFish 3 From Novice to Professional or should I just make some Online tutorials.. get the book Beginning Java EE 6 Platform with GlassFish 3 From Novice to Professional or follow the Java EE 6 tutorial . In..
Real differences between “java -server” and “java -client”? http://stackoverflow.com/questions/198577/real-differences-between-java-server-and-java-client which differ between client and server configuration. From Chapter 2 of the whitepaper The Java HotSpot Performance Engine..
Setting multiple jars in java classpath http://stackoverflow.com/questions/219585/setting-multiple-jars-in-java-classpath answers on this page. Thanks davorp et al Wim Deblauwe From the Classpath document section entitled Understanding class..
Is there a performance difference between a for loop and a for-each loop? http://stackoverflow.com/questions/256859/is-there-a-performance-difference-between-a-for-loop-and-a-for-each-loop java performance for loop share improve this question From Item 46 in Effective Java by Joshua Bloch The for each loop..
http://stackoverflow.com/questions/3130311/weird-integer-boxing-in-java line is actually guaranteed by the language specification. From section 5.1.7 If the value p being boxed is true false a byte..
How to avoid Java Code in JSP-Files? http://stackoverflow.com/questions/3177733/how-to-avoid-java-code-in-jsp-files by tag classes. Here are several cites of relevance From JSP 1.2 Specification it is highly recommended that the JSP..
Java Strings: “String s = new String(”silly“);” http://stackoverflow.com/questions/334518/java-strings-string-s-new-stringsilly makes it ok to just be able to pass it a literal like that From my understanding there is no copy constructor concept in Java..
Design Patterns web based applications http://stackoverflow.com/questions/3541077/design-patterns-web-based-applications developing and maintaining a robust framework yourself. From the mentioned ones I personally recommend JSF 2.0 . In the below..
How to increase to Java stack size? http://stackoverflow.com/questions/3700459/how-to-increase-to-java-stack-size enough for fact 1 24 Xss515m can be enough for fact 1 25 From the numbers above it seems that Java is using about 16 bytes..
What is a stack trace, and how can I use it to debug my application errors? http://stackoverflow.com/questions/3988788/what-is-a-stack-trace-and-how-can-i-use-it-to-debug-my-application-errors would be anything in the com.example.myproject package. From the second example above we'd first want to look down for the..
Best practices for exception management in Java or C# http://stackoverflow.com/questions/409563/best-practices-for-exception-management-in-java-or-c-sharp most callers only care if operation is successful or not. From this comment it brings up some questions to think about when..
Hibernate hbm2ddl.auto possible values and what they do? http://stackoverflow.com/questions/438146/hibernate-hbm2ddl-auto-possible-values-and-what-they-do java hibernate hbm2ddl share improve this question From the community documentation hibernate.hbm2ddl.auto Automatically..
“implements Runnable” vs. “extends Thread” http://stackoverflow.com/questions/541487/implements-runnable-vs-extends-thread implements Runnable&rdquo vs. &ldquo extends Thread&rdquo From what time I've spent with threads in Java I've found these two..
How are SSL certificate server names resolved/Can I add alternative names using keytool? http://stackoverflow.com/questions/8443081/how-are-ssl-certificate-server-names-resolved-can-i-add-alternative-names-using Java 7 uses RFC 6125 which might be too recent for this. From RFC 2818 Section 3.1 If a subjectAltName extension of type dNSName..
http://stackoverflow.com/questions/9404625/java-pass-by-reference object of type Foo with an attribute f . Foo f new Foo f From the method side a reference of type Foo with a name a is declared..
PreparedStatement IN clause alternatives? http://stackoverflow.com/questions/178479/preparedstatement-in-clause-alternatives Consider the following SQL statement SELECT my_column FROM my_table where search_column IN Using preparedStatement.setString..
How to turn off the Eclipse code formatter for certain sections of Java code? http://stackoverflow.com/questions/1820908/how-to-turn-off-the-eclipse-code-formatter-for-certain-sections-of-java-code instead of something like String query SELECT FOO BAR BAZ FROM ABC WHERE BAR 4 I have something like String query SELECT FOO.. 4 I have something like String query SELECT FOO BAR BAZ FROM ABC WHERE BAR 4 This style makes the SQL much easier to read.. STOP ECLIPSE FORMATTING String query SELECT FOO BAR BAZ FROM ABC WHERE BAR 4 START ECLIPSE FORMATTING Obviously one solution..
How do I get the size of a java.sql.ResultSet? http://stackoverflow.com/questions/192078/how-do-i-get-the-size-of-a-java-sql-resultset
http://stackoverflow.com/questions/1986998/resultset-to-pagination final String SQL_SUBLIST SELECT id username job place FROM contact ORDER BY id LIMIT d OFFSET d public List Contact list.. final String SQL_SUBLIST SELECT id username job place FROM SELECT id username job place FROM contact ORDER BY id WHERE.. id username job place FROM SELECT id username job place FROM contact ORDER BY id WHERE ROWNUM BETWEEN d AND d public List..
How to retrieve and display images from a database in a JSP page? http://stackoverflow.com/questions/2340406/how-to-retrieve-and-display-images-from-a-database-in-a-jsp-page String SQL_FIND SELECT content contentType contentLength FROM Image WHERE name protected void doGet HttpServletRequest request..
http://stackoverflow.com/questions/2839321/java-connectivity-with-mysql ResultSet rs stmt.executeQuery SELECT ID FROM USERS ... rs.close stmt.close conn.close share improve this..
http://stackoverflow.com/questions/3649014/send-email-using-java final MimeMessage msg new MimeMessage session Set the FROM and TO fields msg.setFrom new InternetAddress username @gmail.com..
http://stackoverflow.com/questions/5003142/jsp-using-mvc-and-jdbc SELECT id name description price FROM product resultSet statement.executeQuery while resultSet.next..
CSRF, XSS and SQL Injection attack prevention in JSF http://stackoverflow.com/questions/7722159/csrf-xss-and-sql-injection-attack-prevention-in-jsf input into SQL strings like so String sql SELECT FROM user WHERE username ' username ' AND password md5 password String.. username ' AND password md5 password String jpql SELECT u FROM User u WHERE u.username ' username ' AND u.password md5 ' password.. parameterized queries where applicable. String sql SELECT FROM user WHERE username AND password md5 String jpql SELECT u FROM..
How to use an existing database with an Android application [duplicate] http://stackoverflow.com/questions/9109438/how-to-use-an-existing-database-with-an-android-application public Cursor getTestData try String sql SELECT FROM myTable Cursor mCur mDb.rawQuery sql null if mCur null mCur.moveToNext..
Is it safe to use a static java.sql.Connection instance in a multithreaded system? http://stackoverflow.com/questions/9428573/is-it-safe-to-use-a-static-java-sql-connection-instance-in-a-multithreaded-syste connection.prepareStatement SELECT id username email FROM user WHERE username AND password md5 statement.setString 1 username..
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