Showing posts with label java. Show all posts
Showing posts with label java. Show all posts
Wednesday, June 17, 2026

Android java: migrate build to gradle version catalog

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create a new gradle catalog, project -> gradle -> new -> Version Catalog, it will prompt "lib" and press enter. fill libs...
Wednesday, June 10, 2026

Java: reading config.conf file

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example config.conf # http and https ports configuration http_port = 48001 https_port = 48001 # printer port printer_port=/dev/rfcomm0 # ...
Monday, June 8, 2026

Java: http and https (self sign certificate)

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install mkcert # apt install mkcert go to root of netbeans project and create self sign certificate $ mkcert localhost Created a new lo...
Saturday, June 6, 2026

Java: using thermal printer 6106 - 80mm esc/pos java in debian 13 bluetooth

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Install bluetooth software $ apt install firmware-misc-nonfree bluez bluez-tools blueman screen linux user groups: bluetooth, lp, netdev,...
Monday, June 1, 2026

Java: using thermal printer 6106 - 80mm esc/pos java in debian 13 usb

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insert your printer using usb cable # lsusb ... Bus 008 Device 002: ID 28e9:0289 GDMicroelectronics micro-printer Bus 009 Device 001: ID 1...
Saturday, May 30, 2026

Java: enumerate com serial using fazecast jSerialComm

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Simple code to enumerate serial com port /* * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this ...

Java: Hook shutdown to run java application as systemd

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This is minimum java code to hook shutdown /* * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change thi...

Java Netbeans: upgrade binary Netbeans 29 to Netbeans 30

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 This step is straight forward: go to your root directory (e.g your home dir ~/), and rename old folder e.g ~/netbeans29. extract netbeans 3...
Monday, May 25, 2026

Java: maven escpos-coffee library, output to binary file

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This is working demo how to create print preview and generate output.bin which is valid byte format to send to thermal printer. Edit pom.xml...
Sunday, May 24, 2026

Java: using maven in Debian 13

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Apache Maven is an open-source build automation and project management tool primarily used for Java applications. It simplifies the developm...
Tuesday, May 19, 2026

Debian 13: configurating Syris RD200-M1-G v01.55 Card Reader Part 2, detecting card reader in Debian

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Add you as group of dialout (20) # usermod -aG dialout myuser # usermod -aG uucp myuser # usermod -aG lock myuser # usermod -aG tty myuser...

Debian 13: configurating Syris RD200-M1-G v01.55 Card Reader Part 1, firmware upgrade

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By default Syris RD200-M1-G v01.55 run in keyboard mode. It will send to text when card detected.  You need to upgrade the firmware for supp...
Saturday, May 16, 2026

Android java: calculating grid column and grid row

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Target emoji size 48 dp // ------------ EMOJI PICKER // target emoji size int finalWidth=xxx,finalHeight=yyy; // fi...
Friday, May 15, 2026

Android java: calculation for ime wreda keyboard build 2026.09

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Code // Emoji column and row int emojiGridColumns = 8; // store number of emoji float emojiGridRows = 3.5f; // store row in emo...
Thursday, February 26, 2026

Android java: using sqliteopenhelper pattern code

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Using additional Room may increase size of application, means more lines required to executed. implement SQLiteOpenHelper rather then using ...
Monday, February 23, 2026

Android java: boot on boot receiver

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This is a table on all android boot where on receive event trigger your application: State Security Status getMySharedPre...

Android java: Work Manager and Alarm Manager

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Java Android Scheduling: Work Manager and Alarm Manager WorkManager:  Constraints: You can specify conditions like "only run when charg...