Java.util.Map and java.util.HashMap samples

Hi.
Please, I need some code samples of java.util.Map and java.util.HashMap interfaces. I have problems to retreive objects in the map.
Cheers,
Cata

Try the tutorial:
http://java.sun.com/docs/books/tutorial/collections/index.html

Similar Messages

Why not Deprecate java.util.Date and java.util.Calendar

With the introduction of java.time, why did you not flag java.util.Date and java.util.Calendar. These classes have been a bane to every Java developer and should never be used again with the introduction of Java 1.8.

Adding the @Deprecated annotation would only just provide a warning about an old API and recommendation to the developer(s) to no longer use it. Doing so would not break any existing library out there; in fact quite a number of constructors and methods on the Date class have already been flagged deprecated.
The new java.time package is far superior to Date/Calendar.

Java.sql.Date and java.util.Date - class loaded first in the classpath

I had two jar files which has java.util.Date and java.sql.Date class file. i want to know whether which class is loaded first in the classpath...
I like to change the order of loading the class at runtime...
Is there is any way to change the order of loading of class...
I may have different version of jar files for example xerces,xercesImpl. some of the code uses xerces ,some of the code uses xercesImpl..i had common classes.
I like to load the class with the same name according to the order i need..
Can we do all these in Run time ?????

I had two jar files which has java.util.Date and
java.sql.Date class file. i want to know whether
which class is loaded first in the classpath...
I like to change the order of loading the class at
runtime...
Is there is any way to change the order of loading of
class...
I may have different version of jar files for example
xerces,xercesImpl. some of the code uses xerces ,some
of the code uses xercesImpl..i had common classes.
I like to load the class with the same name according
to the order i need..
Can we do all these in Run time ?????That is meaningless.
The classes you are referring to are part of the Java API. Third party jars have no impact on that. And you can't change to the order because java.sql.Data is derived from java.util.Date. So the second must load before the first.
And if you have two jar files with those classes in them (and not classes that use them) then you either should already know how to use them or you should stop trying to do whatever you are doing because it isn't going to work.

Java.util.Date and java.sql.Date

when i am trying to displaying date in my jsp page errors occurs saying that java.util.date and java.sql.date are matching..
i have some sql statements which i need to execute in the page.so i cant delete that import sql statement.
so what is the solution for this.
i want to display the date as 19th april 2003....in the jsp page.
thank u

You should use full names.
java.util.Date date;
java.sql.Date sdate;
..And it may be a good idea to delete one of the two "import" declaration of packages.

Conversions between java.util.Date, java.util.Timestamp and java.sql dates

I am coding a hoilday booking system using JSP to interact with a SQL Server database. On my JSP form which retrieves the information I have a little javascript pop-up date selector which appears to be returning a Timestamp value although the string value is visable in the entry field. Can I pass this to a javabean as a Timestamp, so far I have only passed strings? Also I then have to enter it in the database and so will need to convert it to an sql date type but I dont know which one is best. Previous to using the Timestamp returning calendar I was just entering text and parsing it to a util.Date in the bean and then converting that to an sql.Date for entry in the database. That worked fine but I want to use the pop-up any ideas? Also my bean won't compile if I declare java.util.Timestamp t;(cannot resolve symbol Timestamp !) even though I have imported util.

First of all, java.util.Timestamp does not exist. You probably need java.sql.Timestamp.
java.sql.Date and java.sql.Timestamp inherit from java.util.Date. So converting from java.sql.Date or java.sql.Timestamp to java.util.Date is easy, you don't have to do anything.
To convert a java.util.Date to a java.sql.Timestamp, do something like this:
import java.sql.Timestamp;
import java.util.Date;
Date date = new Date();
Timestamp ts = new Timestamp(date.getTime());Jesper

About Java mapping and java proxy

Hi
Iam new to Xi and basically iam an ABAPER.When iam dooing mappinps or proxies i cant able to understand the java pari cant (javamapping and java proxies) .I need some notes on java mapping and java proxy which is easy to do.And why do we use this java mapping or java proxy particularly when we r having abap mappipng and abap proxy.
thanks in advance

Hi,
refer
Java Mapping
SAP Network Blog: Java Mapping (Part I)
/people/prasad.ulagappan2/blog/2005/06/29/java-mapping-part-i
Java Mapping in XI
https://www.sdn.sap.com/irj/sdn/advancedsearch?cat=sdn_all&query=java+mapping&adv=false&sortby=cm_rnd_rankvalue#
Runtime Environment (Java Mappings) (SAP Library - Partner Connectivity Kit)
http://help.sap.com/saphelp_nw04/helpdata/en/bd/c91241c738f423e10000000a155106/frameset.htm
Java Mapping (SAP Library - Partner Connectivity Kit)
http://help.sap.com/saphelp_nw04/helpdata/en/e2/e13fcd80fe47768df001a558ed10b6/frameset.htm
SAP Network Blog: Testing and Debugging Java Mapping
/people/stefan.grube/blog/2006/10/23/testing-and-debugging-java-mapping-in-developer-studio
SAP Network Blog: Implementing a Java Mapping in SAP PI
/people/carlosivan.prietorubio/blog/2007/12/21/implementing-a-java-mapping-in-sap-pi
"JAVA MAPPING", an alternate way of reading a CSV file
/people/rahul.nawale2/blog/2006/07/18/java-mapping-an-alternate-way-of-reading-a-csv-file
SAP Network Blog: XI Java Mapping Helper (DOM)
/people/alessandro.guarneri/blog/2007/03/25/xi-java-mapping-helper-dom
Java Proxy
Java Proxy Objects (SAP Library - SAP Exchange Infrastructure)
http://help.sap.com/saphelp_nw04/helpdata/en/c5/7d5e3c754e476ee10000000a11405a/frameset.htm
Accessing Active Directory through Java Proxy on SAP Exchange Infrastructure 3.0
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/10716e9f-23d7-2a10-8c8c-d2665615f8fc
Thanks
Swarup

Give me description about JAVA Proxy Runtime and JAVA Proxy Server

Give me description about JAVA Proxy Runtime and JAVA Proxy Server with some examples.

Hi,
Java proxy runtime :
Using the Java proxy runtime you can receive messages or send messages to the Integration Server.
This will help you
http://help.sap.com/saphelp_nw04/helpdata/en/64/7e5e3c754e476ee10000000a11405a/frameset.htm
Java proxy server :
The connection to the Integration Server by using the Java proxy runtime.
This will help you
http://help.sap.com/saphelp_nw04/helpdata/en/87/5305adc23540b8ac7bce08dbe96bd5/frameset.htm
Regards
Agasthuri Doss

Java Web Start and Java Preferences

I am having trouble with Java Web Start and Java Preferences. I have tried reinstalling the update with the link http://www.apple.com/downloads/macosx/apple/application_updates/javaformacosx105 update6.html but to no avail. What else can be done ? Moreover the file /System/Library/Frameworks/JavaVM.framework/Versions/A/ seems to be in place, but Java Web Start wont open and Java Preferences can't access cache files. Any ideas about how to resolve this? I have been having issues with Java for a long time and have already done a clean Leopard reinstall and all the Combo updates. Java Web Start and Java Preferences worked correctly for a while after that but seem to have gone haywire again.

bump

Lib32-util-linux and lib32-util-linux-ng are in conflict

hi
i'm running a 64bit arch linux (with some 32bit apps)
today i got a strange conflict - and the "solution" seems pretty dangerous to me, or am i wrong?
[root:~]# pacman -S multilib/dwarffortress
resolving dependencies...
looking for inter-conflicts...
:: lib32-util-linux and lib32-util-linux-ng are in conflict. Remove lib32-util-linux-ng? [y/N] Y
Remove (1): lib32-util-linux-ng-2.18-3
Total Removed Size: 0.58 MB
Targets (41): lib32-libxfixes-4.0.5-3 lib32-libxdamage-1.1.3-3 lib32-pcre-8.10-3 lib32-dbus-core-1.4.0-2 lib32-glib2-2.26.1-2
lib32-atk-1.32.0-1 lib32-pixman-0.20.2-1 lib32-cairo-1.10.0-3 lib32-pango-1.28.3-1 lib32-util-linux-2.19-1
lib32-e2fsprogs-1.41.14-2 lib32-openssl-1.0.0.d-1 lib32-db-5.1.19-1 lib32-sqlite3-3.7.4-1 lib32-heimdal-1.3.3-3
lib32-ncurses-5.7-6 lib32-readline-6.1.002-3 lib32-libgpg-error-1.9-4 lib32-libgcrypt-1.4.6-3 lib32-gnutls-2.10.4-1
lib32-libtiff-3.9.4-3 lib32-gdk-pixbuf2-2.22.1-1 lib32-libcups-1.4.5-1 lib32-libxcursor-1.1.11-1
lib32-libxrandr-1.3.1-1 lib32-libxi-1.4.1-1 lib32-libxcomposite-0.4.3-1 lib32-gtk2-2.22.1-2 lib32-libdrm-2.4.23-1
lib32-libxxf86vm-1.1.1-1 lib32-libgl-7.10.1-1 lib32-mesa-7.10.1-1 lib32-sdl-1.2.14-8 lib32-sdl_image-1.2.10-3
lib32-flac-1.2.1-7 lib32-libsndfile-1.0.23-2 openal-1.12.854-2 lib32-openal-1.12.854-4 sdl_ttf-2.0.10-1
lib32-sdl_ttf-2.0.10-3 dwarffortress-0.31.21-1
Total Download Size: 9.07 MB
Total Installed Size: 79.96 MB

ulukay wrote:
ngoonee wrote:Firstly, searches are not cached, so noone would be able to view your link properly. However yes somehow I've seen that the other threads on this are not turning up, so I suggest instead searching for 'util-linux', not 'lib32-util-linux', you will find the solution then.
1. thanks for not simply posting a link
2. that search would return threads regarding this problem on 32bit hosts - i run a 64bit host. my main concern is that this would install incompatible 32bit binaries.
1. You're welcome. Self-help is the best kind.
2. If you'd done the search I recommended you would have seen that the problem is not related to arch at all, but is due to upstream renaming.

Install Java (1.4) and Java (1.5) on the same Windows XP mc reqd for 2 apps

I have a requirement to install 2 different versions of Java (1.4) and Java (1.5) on the same Windows XP machine. There are 2 applications one uses Java (1.4) and the other Java (1.5)
Both the application is run by taking the JAVA Path , Classpath specified in the Environment variables on the Advanced tab in My Computer. How to achieve it ? Immediate help is required. Thanks in advance.

{color:#ff0000}{size:20px}CROSS POSTED{size}{color}
[http://forums.sun.com/thread.jspa?threadID=5333227]
Cross posting is rude.
db

Differences between Java Virtual Machine and Java HotSpot ??

I am little bit confused between Java Virtual Machine and Java HotSpot.
My understanding is:
Java Virtual Machine is the environment to execute Java programs. I think I could understand this part.
However, the description says, "The Java HotSpot product line consists of a server-side and a client-side virtual machine that share the Java HotSpot runtime environment, but have different compilers suited to the different performance characteristics of clients and servers."
I am confused with server-side virtual machine. what is that?? Does it mean the environment to execute Java programs remotely through network?? For example, Java plug-in.?? Please advise.

Hotspot is a JVM.
Hotspot has different configuration settings. Some of those settings are better suited for a client application. Some are better suited to server applications.

Java.util.Map and null key

Hi,
For information, according to the implementation, it is possible to put and get a null key when using a map.
The null key can be added and retrieved when using a HashMap, an exception is thrown for a TreeMap.

The documentation for java.util.Map states:
Some map implementations have restrictions on the keys and values they may contain. For example, some implementations prohibit null keys and values, and some have restrictions on the types of their keys. Attempting to insert an ineligible key or value throws an unchecked exception, typically NullPointerException or ClassCastException.The documentation for java.util.TreeMap.put() states:
Throws:
NullPointerException - if the specified key is null and this map uses natural ordering, or its comparator does not permit null keysSo a Map generally may or may not support null keys and/or values and the decision is up to the concrete implementation. TreeMap states that it doesn't support null keys, unless a Comparator is used that permits null keys.

Java.util.Map to flash.utils.Dictionary

Hi,
I'm using Blazeds for my remoting between Flex and Java. I have an Object-to-object map on the Java side. This converts to an untyped Object in Flex having the properties as the 'toString' of the key Object.
Has anyone been able to convert an Object-to-object java map to a flash Dictionary object? Why wouldn't it do that as default?
Thanks,
Eyal

Yes, You can, I have successfully mapping form java HashMap to Flex Dictionary. The following is the code fragment for the success case:
The hint is that you need to use ObjectProxy in Flex to map HashMap in Java.
Man Pak Hong, Dave
Analyst Programmer
[email protected]
manpakhong
Java:
// ================================================================================
    public Map<String, Object> getCaseDetails(Long sid) throws ApplicationException, SystemException {
        // Vos Declaration
        Case caseVo = null;
        UserInfo ossUserInfoVo = null;
        UserInfo spUserInfoVo = null;
        Ngo ossNgoVo = null;
        Ngo spNgoVo = null;
        Personal personalVo = null;
        Contact contactVo = null;
        CaseAttachment caseAtthVo = null;
        Office ossOffice = null;
        SwdOffice swdOffice = null;
        UserInfo swdEao = null;
        NeedAssess needAssess = null;
        List <CaseRegPropVw> caseRegPropVwList = null;
        CaseDao daoCase = new CaseDao();
        caseVo = daoCase.getCase(sid);
        if (caseVo != null)
            UserInfoDao daoUserInfo = new UserInfoDao();
            ossUserInfoVo = daoUserInfo.getUserInfo(caseVo.getOssCmSid());
            spUserInfoVo = daoUserInfo.getUserInfo(caseVo.getNgoCmSid());
            // caseRegProp
            CaseRegPropVwDao daoCaseRegPropVw = new CaseRegPropVwDao();
            caseRegPropVwList = daoCaseRegPropVw.listCaseRegPropVwByLessRegNo(caseVo.getLessRegNo());
        NgoDao daoNgo = new NgoDao();
        if (ossUserInfoVo != null)
            ossNgoVo = daoNgo.getNgo(ossUserInfoVo.getNgoSid());
        if (spUserInfoVo != null)
            spNgoVo = daoNgo.getNgo(spUserInfoVo.getNgoSid());
        // personal
        if (caseVo != null)
            PersonalDao daoPersonal = new PersonalDao();
            personalVo = daoPersonal.getPersonal(caseVo.getPersonalSid());
            // jscontact
            ContactDao daoContact = new ContactDao();
            contactVo = daoContact.getContact(caseVo.getSid());
            // ossCaseAtth
            CaseAttachmentDao daoCaseAtth = new CaseAttachmentDao();
            caseAtthVo = daoCaseAtth.getCaseAttachment(caseVo.getSid(), CaseAttachmentPolicy.ATT_TYPE_CONSENT_FORM);
            // ossOffice
            OfficeDao daoOssOffice = new OfficeDao();
            ossOffice = daoOssOffice.getOffice(caseVo.getOssOfficeSid());
        if (personalVo != null)
            // swdOffice
            SwdOfficeDao daoSwdOffice = new SwdOfficeDao();
            swdOffice = daoSwdOffice.getSwdOffice(personalVo.getSwdOfficeSid());
            // swdEao
            UserInfoDao daoSwdEao = new UserInfoDao();
            swdEao = daoSwdEao.getUserInfo(personalVo.getSwdEaoSid());
            // needAssess
            NeedAssessDao daoNeedAssess = new NeedAssessDao();
            needAssess = daoNeedAssess.getNeedAssess(personalVo.getSid());
        Map<String, Object> hm = new HashMap<String, Object>();
        hm.put("Case", caseVo);
        hm.put("OssUserInfo", ossUserInfoVo);
        hm.put("NgoUserInfo", spUserInfoVo);
        hm.put("OssNgo", ossNgoVo);
        hm.put("SpNgo", spNgoVo);
        hm.put("Personal", personalVo);
        hm.put("Contact", contactVo);
        hm.put("CaseAtth", caseAtthVo);
        hm.put("OssOffice", ossOffice);
        hm.put("SwdOffice", swdOffice);
        hm.put("SwdEao", swdEao);
        hm.put("NeedAssess", needAssess);
        hm.put("CaseRegPropsVw", caseRegPropVwList);
        return hm;
Flex part
// ==================================================================================
            // CASEDETAILS
            private function getCaseDetailsResultHandler(result:ObjectProxy):void
                var dc:ObjectProxy = result;
                this.editItemOssUserInfo = dc["OssUserInfo"];
                detailCaseInfo.editItemOssUserInfo = editItemOssUserInfo;
                this.editItemOssNgo = dc["OssNgo"];
                detailCaseInfo.editItemOssNgo = editItemOssNgo;
                this.editItemCase = dc["Case"];
                detailCaseInfo.editItemCase = editItemCase;
                detailPersonalInfo.editItemCase = editItemCase;
                this.editItemPersonal = dc["Personal"];
                detailCaseInfo.editItemPersonal = editItemPersonal;
                detailPersonalInfo.editItemPersonal = editItemPersonal;
                this.editItemContact = dc["Contact"];
                detailCaseInfo.editItemContact = editItemContact;
                detailPersonalInfo.editItemContact = editItemContact;
                this.editItemCaseAtth = dc["CaseAtth"];
                detailCaseInfo.editItemCaseAtth = editItemCaseAtth;
                this.editItemOssOffice = dc["OssOffice"];
                detailCaseInfo.editItemOssOffice = editItemOssOffice;
                this.editItemSwdOffice = dc["SwdOffice"];
                detailCaseInfo.editItemSwdOffice = editItemSwdOffice;
                this.editItemSwdEao = dc["SwdEao"];
                detailCaseInfo.editItemSwdEao = editItemSwdEao;
                this.editItemNeedAssess = dc["NeedAssess"];
                detailCaseInfo.editItemNeedAssess = editItemNeedAssess;
                this.listItemCaseRegPropVw = dc["CaseRegPropsVw"];
                this.caseDict = new Dictionary();
                caseDict[CaseDetailPolicy.INIT_OSSUSERINFO] = editItemOssUserInfo;
                caseDict[CaseDetailPolicy.INIT_OSSNGO] = editItemOssNgo;
                caseDict[CaseDetailPolicy.INIT_CASE] = editItemCase;
                caseDict[CaseDetailPolicy.INIT_PERSONAL] = editItemPersonal;
                caseDict[CaseDetailPolicy.INIT_CONTACT] = editItemContact;
                caseDict[CaseDetailPolicy.INIT_CASEATTH] = editItemCaseAtth;
                caseDict[CaseDetailPolicy.INIT_OSSOFFICE] = editItemOssOffice;
                caseDict[CaseDetailPolicy.INIT_SWDEAO] = editItemSwdEao;
                caseDict[CaseDetailPolicy.INIT_NEEDASSESS] = editItemNeedAssess;
                // detailCaseInfo.init();

Java Plug-in and Java Web Start Will Not Start In JDK 1.4.2_03

I can't get the Java Plug-in or Java Web Start to start in JDK 1.4.2_03, but they did work when I first installed the JDK months ago. When I double-click either icon an hourglass displays for a second and then disappears without opening the window. I don't even get an error message.
I've tried reinstalling the JDK three times. On the last reinstall, I followed some instructions on how to completely remove the JDK. Here's the URL of the instructions I followed:
http://www.pcreview.co.uk/forums/thread-295773.php
Strangely JBuilder stopped working too.
I'm running Windows 2000.
Help!
Thank you!

Hi
Once u have got the Certificate from the Verisign there will be 3 chains in that cert(what i think)......Get the other 2 certificates from U r cert(like intermediate and Root)....and install them in the trust and Intermediate folder...
other option is u generate the CSR keeping Sys Date 1 month ahead..( i tried like this only..it worked)
Regards,
Anand

Lion Server Java Control Panel and Java applications empty?

I have installed FileMaker Server 12 on a Lion Server (10.7.5). The server is pretty clean, only a few users have been set up for CalDAV and CardDAV use in a small company. While installing the FileMaker software shouted for Java, which I installed from Oracle, version 7 update 10 (used the link).
But Java is not running fine as it seems. When I open System Preferences - Java to open the Java Control Panel, the panel shows up but is completely empty. And so for any Java program I run, all windows will show up empty.
Any ideas anyone?

Try clearing the java cache manually.
/Users/username/Library/Caches/Java/cache/
if that doesn't work follow this process.
Uninstall the JRE7
Restart
Install Java for OS X 2012-006
Restart
Install JRE7
Restart
Lastly, if this is a hackintosh you may be fighting a uphill battle. I saw a known issue posted by oracle with some graphics cards that produced this issue on windows.

Java.util.Map and java.util.HashMap samples

Similar Messages

Maybe you are looking for