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Original Post: In the Spotlight: LWUIT Featured App Gallery
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This week's java.net Spotlight is the LWUIT Featured App Gallery, and along with it, Shai Almog's related post, "Latest & Greatest In The LWUIT Featured Apps Gallery". If you haven't visited the featured app gallery before, it provides multiple screenshots of about 80 different LWUIT applications. LWUIT, in case you're not familiar with it, is the Lightweight UI Toolkit. It's a project hosted on java.net. Here's the project preface:
Writing appealing cross device applications today in Java ME is challenging. Due to implementation differences in fonts, layout, menus, etc. the same application may look and behave very differently on different devices. In addition much of the advanced UI functionality is not accessible in LCDUI and requires the developer to write very low level "paint" type code. The Lightweight UI Toolkit was developed to address these issues. The Lightweight UI Toolkit makes it very easy to create compelling UI's that will look and behave the same on all devices using a programming paradigm similar to Swing. This Toolkit is able to run on CLDC1.1 MIDP2.0/CDC PBP/SE.
Shai's post highlights 13 recent additions to the gallery, including Drum Box (pictured above). Drum Box is:
a pattern based drum sequencer with over 40 drum instruments to choose from. Works on most recent Nokia and Sony Ericson handsets. Edit patterns, string them together into a song, and export it as a MIDI file to play as a ringtone, or to import into a desktop music package.
[provides] users with traveller's information on mobile phones.Thanks to the effective data compression, the application displays public transportation timetables without the need for Internet connection (off-line).Cooperating with the bus or tram tracking system in a city, it can provide information about real waiting times for a given line (on-line).
See Shai's post for more recent additions to the gallery, or visit the LWUIT Featured App Gallery itself to view screenshots of 80 or more LWUIT applications.
Moving on from
identity and equality of objects, different notions of equality are also surprisingly subtle in some numerical realms. As comes up from time to time and is often surprising, the "==" operator defined by IEEE 754 and used by Java for comparing floating-point values
(JLSv3 §15.21.1)
is not an equivalence relation. Equivalence relations satisfy three properties, reflexivity (something is equivalent to itself), symmetry (if a is equivalent to b, b is equivalent to a), and transitivity (if a is equivalent to b and b is equivalent to c, then a is equivalent to c)....
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