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• KQueue: Removed setMode() and getMode() to avoid concurrency problems

• Some minor code and documentation changes

Current Version 2025.09.15

106KB

ch.k43.util.2025.09.15.zip

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• KQueue: New class to support named LIFO/LIFO queues

• K: added writeConsole(), fixed formatting bug in getTimeISO8601(Calendar), added more object types in isEmpty()

• Some minor code and documentation changes

Version 2025.09.02

103KB

ch.k43.util.2025.09.02.zip

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• KCmdArgParser: new class to parse and retrieve command line arguments

• K: Added isValidHostName(), readConsole(), isMinimumVersion(), internal optimization in timer methods

• Some minor code and documentation changes

Version 2025.06.05

97KB

ch.k43.util.2025.06.05.zip

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• K: Added concat(), clear(), hexToBytes()

• KTimer: Added getElapsedNanoseconds()

• Some minor code and documentation changes

Version 2025.05.17

97KB

ch.k43.util.2025.05.17.zip

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• KPasswordVault: New class to securely hash, store and verify passwords

• KSMTPMailer: Added setLocalFQDNHostName()

• Updated Sample Code

• Some minor code and documentation changes

Version 2025.04.26

93KB

ch.k43.util.2025.04.26.zip

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• K: Added repeat(), truncateMiddle(), compressGZIP(), decompressGZIP()

• Some minor code and documentation changes

Version 2025.04.13

92KB

ch.k43.util.2025.04.13.zip

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• KHTTPServerThread: new Class to support HTTP server applications (for web or REST services)

• K: Added getHTTPStatusText() to return text for a given HTTP status code

• Updated Sample Code

• Some minor code and documentation changes

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Version 2025.03.30

84KB

ch.k43.util.2025.03.30.zip

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• K: Enhance toPEM() to format certificate chain of public keys and add option to describe objects in comments

• Added sample GraalVM macOS native image executable "GetCurrentVersion" in Tips / FAQ

• Some minor code and documentation changes

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Version 2025.03.20

83KB

ch.k43.util.2025.03.20.zip

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• K: Added loadKeyStore(), toPEM(), generateRSAKeyPair(), encodeHTML() and decodeHTML()

• Updated sample code

• Some minor code and documentation changes

Version 2025.03.02

81KB

ch.k43.util.2025.03.02.zip

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• K: Added INSTANCE_UUID to identify running application instance

• KLog: Added options in KLog.properties and application startup parameters (KLogInclude and KLogExclude) to include or exclude data from logging

• Some minor code and documentation changes

Version 2025.02.26

81KB

ch.k43.util.2025.02.26.zip

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• Publish Java code on GitHub as open source

• K: Added getCurrentVersionNumber()

• Some minor code and documentation changes

Version 2025.02.19

81KB

ch.k43.util.2025.02.19.zip

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• K: Added getPasswordHash()

• Added HelloWorld example to test installation with java -jar ch.k43.util.jar

• Some minor code and documentation changes

Version 2025.02.13

78KB

ch.k43.util.2025.02.13.zip

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• KTimer: Added reset()

• K: Added saveError()

• K: Added multiple static fields that describe the environment

• Updated sample code

• Some minor code and documentation changes

Version 2025.01.27

77KB

ch.k43.util.2025.01.27.zip

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• KHTTPClient: Added setTimeOutSec()

• KLog: Added command line parameter KLogPropertyFile to override name and location of KLog.properties file

• KLog: Added command line parameter KLogLevel to override logging level (INFO, ERROR, DEBUG or OFF)

• Changed locale of generated JavaDoc output to en_US

• Some minor code and documentation changes

Version 2025.01.22

76KB

ch.k43.util.2025.01.22.zip

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• K: Added replaceParams()

• KHTTPClient: Treat HTTP return code 200-299 as successful

• KLog: Added parameterized logging to all methods, e.g. KLog.error("API call failed - Return code {}", returnCode)

• Internal code optimization and documentation changes

Version 2025.01.19

75KB

ch.k43.util.2025.01.19.zip

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• Support for GraalVM native-image compilation (see Tips / FAQ)

• Check if JVM is Java 8 (version 1.8) or higher

• K: Added isNewVersionAvailable()

• Some minor code changes

• Major rewrite of the website content

Version 2024.12.08

75KB

ch.k43.util.2024.12.08.zip

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• KLog: Save the last 10 errors even if logging is not active (retrievable with K.getLastError() and K.getLastErrors()

• K: Changed formatBytes() to show e.g. MiB instead of MB (IEC standard)

• K: Added getPrivateKey(), getPublicKey() and getCertificate()

• Sample code updated

• Some minor code and documentation changes

Version 2024.10.26

73KB

ch.k43.util.2024.10.26.zip

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• KDB: Added option argTimeOutSec to exec()

• KDB: Added prepare() and execPrepare() to support SQL precompilation and prevent SQL injection attacks

• Some minor code and documentation changes

Version 2024.09.15

71KB

ch.k43.util.2024.09.15.zip

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• KLog: Fix small bug when debug log is active in YAML code

Version 2024.09.14

71KB

ch.k43.util.2024.09.14.zip

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• KLog: Added formatter class to write logging as YAML output

• KDB: Added getDataAsYAML() to output result set as YAML string

• K: Added encodeYAML() and decodeYAML()

• Some minor code and documentation changes

Version 2024.09.12

69KB

ch.k43.util.2024.09.12.zip

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• K: Added option to isNumber() to check for allowed numeric range

• KLog: Show CPU count and OS disk size in debug log

• Some minor code and documentation changes

Version 2024.09.06

68KB

ch.k43.util.2024.09.06.zip

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• KThread: New class for easy Java thread creation and termination

• K: Removed argForce argument from stopThread() as newer Java versions removed the depreciated Thread.stop() method

Version 2024.09.02

68KB

ch.k43.util.2024.09.02.zip

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Upgrade Notice: Make sure you are using the new Jakarta/Angus mail jar files for the KSMTPMailer and KLogSMTPHandler classes

• KSMTPMailer: Migrated from JavaMail (javax.mail) to Eclipse Jakarta/Angus mail.

• KDB: Added option in getDataAsTable() to optionally print column headers

• Some minor code and documentation changes

Version 2024.08.29

68KB

ch.k43.util.2024.08.29.zip

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• K: Added isInteger() and stopThread()

• KLogSMTPHandler: Added logging handler to send error log entries (FATAL log level) to any SMTP server

• Some minor code and documentation changes

Version 2024.08.24

63KB

ch.k43.util.2024.08.23.zip

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• K: Remove SHA-1 algorithm from generateHash()

• K: Added serialize() and deserialize()

• KDB: Added maxRows argument to exec() call

• Added toString() to all classes to write out object data

• Updated sample code

• Some minor code and documentation changes

Version 2024.08.12

58KB

ch.k43.util.2024.08.12.zip

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• Added architecture overview diagramm for KSocketServer

• K: added round(), compressZLIB() and decompressZLIB()

• Some minor code and documentation changes

Version 2024.07.07

58KB

ch.k43.util.2024.07.07.zip

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• Implemented Java AutoCloseable in KDB, KSocketClient, KSocketServer, KSocketServerListener and KSocketServerThread

• K: Added isNumber()

• K: Added option to encodeJSON() to return null, boolean and number values without quotes

• Some minor code and documentation changes

Version 2024.06.27

57KB

ch.k43.util.2024.06.27.zip

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Upgrade Notice: The K.getJVMMemStats() now returns number of bytes (not KB).

• K: Added formatBytes(), updated getJVMMemStats() to return number of bytes

• KDB: Added setAutoCommit() and getElapsedTime()

• Some minor code and documentation changes

Version 2024.06.22

53KB

ch.k43.util.2024.06.22.zip

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• KLog: New formatter classes to write logging as CSV or XML output

• KLog: Adds UUID field to JSON, CSV, XML and JDBC output

• New KLog.properties sample file uploaded

• Some minor code and documentation changes

Version 2024.06.20

53KB

ch.k43.util.2024.06.20.zip

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• K: Added encode and decode methods for XML

• KLogJDBCHandler: Added logging handler to output data to any JDBC compliant database

• KLog: Added getLevel() and setLevel()

• KDB: Added getDataAsXML(), commit() and rollback()

• KSMTPMailer: Added setUnsubscribe()

• New KLog.properties sample file uploaded

• Some minor code and documentation changes

Version 2024.06.15

48KB

ch.k43.util.2024.06.15.zip

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• KDB: New class to support JDBC compliant databases with various output formats (JSON, CSV, table or Java objects)

• KSMTPMailer: Added setSubject(string, charset) for non-UTF-8 subjects

• KSMTPMailer: Added setOAuth2Authentication() to support OAuth 2.0 authentication

• K: Added encode and decode methods for JSON and CSV

• Some minor code and documentation changes

Version 2024.06.10

42KB

ch.k43.util.2024.06.10.zip

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Upgrade Notice: Don't forget to rename Log.properties to KLog.properties if you are using the KLog framework.

• KLog: Log.properties file renamed to KLog.properties for consistency with the KLog class

• K: Added runGC() and getJVMMemStats()

• KSMTPMailer: Added addText(string, charset) for non-UTF-8 text parts

• Include downloads of Jakarta Mail and Jakarta Activation on this website

• Some minor code and document changes

Version 2024.06.06

42KB

ch.k43.util.2024.06.06.zip

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• KLog: Added setLevelXxx(), isLevelXxx() and resetLevel() to set or query the configured logging level during runtime

• KSMTPMailer: Added getMessageSize() to get size of MIME message after delivery

• KSMTPMailer: Include Jakarta Mail debug log in KLog logging output

• KSMTPMailer: Removed X-TLS-Connection header as there is no guarantee that it is enforced by the SMTP server

• KTimer: Added getStartTime() and toString() to return start time as Calendar object or in ISO-8601 format

• KSocketServerThread: Added writeLine()

• K: Added getRandomInt(), getUTCOffsetMin() and getUTCOffsetAsString()

Version 2024.05.24

40KB

ch.k43.util.2024.05.24.zip

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• K: Added toHex() to format byte array or string to a hexadecimal string

• K: Added getUniqueID() to return unique id (UUID)

• K: Added getCurrentDir() to return current directory

• K: Changed generateHash() to support SHA3-256, SHA3-384 ad SHA3-512

• K: Added getStartTime() to return date and time of application startup

• KHTTPClient: Added put(), patch(), options() and delete() methods

• KSMTPMailer: Added check for hostname (TLS only)

• Added some sample code to this website

• Some minor code and document changes

Version 2024.05.20

40KB

ch.k43.util.2024.05.20.zip

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• K: Added isEmpty() to test string or array for emptiness

• KSMTPMailer: Include platform in X-Mailer header

• KSMTPMailer: Added header X-TLS-Connnection: true/false

• Some code cleanup and documentation changes

Version 2024.05.17

39KB

ch.k43.util.2024.05.17.zip

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• KSMTPMailer: New class to compose and send multipart SMTP email with text, HTML and file attachments

• KSocketServerThread: Added getAuthenthicatedClientCN() to return common name of the full distinguished name

• KSocketClient: Added getAuthenticatedClient() and getAuthenticatedClientCN()

• KFile: Added readPropertiesFile() and writePropertiesFile()

• KLog: Added argException() to throw IllegalArgumentException if expression evaluates true

• K: Added dnsQuery() to return records for all query types (MX, A, etc)

• Some minor code and documentation changes

Version 2024.05.06

33KB

ch.k43.util.2024.05.06.zip

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• First public version