Update java 21

.devcontainer/devcontainer.json

@@ -3,7 +3,7 @@
 {
 	"name": "Java",
 	// Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
-	"image": "mcr.microsoft.com/devcontainers/java:3-17-bookworm",
+	"image": "mcr.microsoft.com/devcontainers/java:3-21-bookworm",
 
 	"features": {
 		"ghcr.io/devcontainers/features/java:1": {

.github/workflows/maven-ci.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        java: [ '17', '21', '25' ]
+        java: [ '21', '25' ]
 
     steps:
     - uses: actions/checkout@v7

README.md

@@ -5,6 +5,9 @@
 # com.bitctrl
 Allgemeine Bibliothek für BitCtrl-Projekte
 
+## Version 3.1.0
+ - Update auf Java 21
+
 ## Version 3.0.1
  - Update der Dependencies
 

pom.xml

@@ -6,16 +6,16 @@
 
 	<groupId>com.bitctrl</groupId>
 	<artifactId>com.bitctrl</artifactId>
-	<version>3.0.2-SNAPSHOT</version>
+	<version>3.1.0-SNAPSHOT</version>
 
 	<name>Allgemeine BitCtrl-Bibliothek</name>
 	<url>http://bitctrl.github.io/${project.artifactId}/</url>
 
 	<properties>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-		<maven.compiler.source>17</maven.compiler.source>
-		<maven.compiler.target>17</maven.compiler.target>
+		<maven.compiler.source>21</maven.compiler.source>
+		<maven.compiler.target>21</maven.compiler.target>
 	</properties>
 
 	<licenses>
@@ -46,11 +46,6 @@
 		<url>https://github.com/bitctrl/${project.artifactId}/</url>
 	</issueManagement>
 
-	<ciManagement>
-		<system>Travis-CI</system>
-		<url>https://travis-ci.org/bitctrl/${project.artifactId}/</url>
-	</ciManagement>
-
 	<profiles>
 		<profile>
 			<id>bitctrl</id>

src/main/java/com/bitctrl/beans/BeanEvent.java

@@ -26,6 +26,7 @@
 
 package com.bitctrl.beans;
 
+import java.io.Serial;
 import java.util.EventObject;
 
 /**
@@ -35,6 +36,7 @@
  */
 public class BeanEvent extends EventObject {
 
+	@Serial
 	private static final long serialVersionUID = 1L;
 
 	private final Object beanData;

src/main/java/com/bitctrl/commands/CommandFinishedEvent.java

@@ -26,6 +26,7 @@
 
 package com.bitctrl.commands;
 
+import java.io.Serial;
 import java.util.EventObject;
 
 /**
@@ -35,6 +36,7 @@
  */
 public class CommandFinishedEvent extends EventObject {
 
+	@Serial
 	private static final long serialVersionUID = 1L;
 	private final boolean successful;
 	private final String message;

src/main/java/com/bitctrl/graph/GraphAlgorithm.java

@@ -116,7 +116,7 @@ private static List<Bogen> getPfadVonWurzel(final Knoten zielKnoten, final Array
 			return pfad;
 		}
 
-		pfad.add(0, stuetzBogen);
+		pfad.addFirst(stuetzBogen);
 		return getPfadVonWurzel(stuetzBogen.getAnfangsKnoten(), pfad);
 	}
 

src/main/java/com/bitctrl/model/ModelElement.java

@@ -4,6 +4,7 @@
 import java.beans.PropertyChangeSupport;
 import java.io.IOException;
 import java.io.ObjectInputStream;
+import java.io.Serial;
 import java.io.Serializable;
 
 import jakarta.xml.bind.annotation.XmlTransient;
@@ -17,6 +18,7 @@
  */
 public class ModelElement implements Serializable {
 
+	@Serial
 	private static final long serialVersionUID = 1L;
 
 	@XmlTransient

src/main/java/com/bitctrl/model/NamedObject.java

@@ -1,5 +1,7 @@
 package com.bitctrl.model;
 
+import java.io.Serial;
+
 /**
  * Ein benanntes Modellelement.
  * 
@@ -10,6 +12,7 @@ public class NamedObject extends ModelElement {
 	/** Konstante für den Namen der entsprechenden Property. */
 	public static final String PROP_NAME = "name";
 
+	@Serial
 	private static final long serialVersionUID = 1L;
 
 	private String name;

src/main/java/com/bitctrl/modell/DAOEvent.java

@@ -26,6 +26,7 @@
 
 package com.bitctrl.modell;
 
+import java.io.Serial;
 import java.util.EventObject;
 
 /**
@@ -36,6 +37,7 @@
 @Deprecated(since = "3.0.0", forRemoval = true)
 public class DAOEvent extends EventObject {
 
+	@Serial
 	private static final long serialVersionUID = 1;
 
 	/** Die Typen einer Änderung. */
@@ -55,7 +57,7 @@ public enum Type {
 		 * Aktualisierung nicht unterscheiden kann, z. B. wenn sich alle Daten der
 		 * Quelle geändert haben.
 		 */
-		Unknown;
+		Unknown
 
 	}
 

src/main/java/com/bitctrl/modell/DAOException.java

@@ -26,6 +26,8 @@
 
 package com.bitctrl.modell;
 
+import java.io.Serial;
+
 /**
  * Dies ist eine allgemeine Exception für Fehler bei der Arbeit mit DAO. In der
  * Regel kapselt eine {@link DAOException} eine andere Exception wie z. B.
@@ -36,6 +38,7 @@
 @Deprecated(since = "3.0.0", forRemoval = true)
 public class DAOException extends Exception {
 
+	@Serial
 	private static final long serialVersionUID = 1L;
 
 	/**

src/main/java/com/bitctrl/net/IP.java

@@ -26,6 +26,7 @@
 
 package com.bitctrl.net;
 
+import java.io.Serial;
 import java.io.Serializable;
 
 /**
@@ -36,6 +37,7 @@
  */
 public class IP implements Serializable {
 
+	@Serial
 	private static final long serialVersionUID = 1L;
 	private static final boolean IP_V4 = true;
 

src/main/java/com/bitctrl/net/MAC.java

@@ -26,6 +26,7 @@
 
 package com.bitctrl.net;
 
+import java.io.Serial;
 import java.io.Serializable;
 import java.util.Arrays;
 
@@ -39,6 +40,7 @@
  */
 public class MAC implements Serializable {
 
+	@Serial
 	private static final long serialVersionUID = 1L;
 
 	/**

src/main/java/com/bitctrl/text/CheckText.java

@@ -128,8 +128,8 @@ public static boolean matches(final String expr, final String str) {
 			searchStrings.add(Constants.EMPTY_STRING);
 		}
 
-		boolean result = tStr.startsWith(searchStrings.get(0))
-				&& tStr.endsWith(searchStrings.get(searchStrings.size() - 1));
+		boolean result = tStr.startsWith(searchStrings.getFirst())
+				&& tStr.endsWith(searchStrings.getLast());
 
 		if (result) {
 			for (final String arg : searchStrings) {

src/main/java/com/bitctrl/util/ListChangedEvent.java

@@ -26,6 +26,7 @@
 
 package com.bitctrl.util;
 
+import java.io.Serial;
 import java.util.EventObject;
 import java.util.List;
 
@@ -38,6 +39,7 @@
  */
 public class ListChangedEvent<T> extends EventObject {
 
+	@Serial
 	private static final long serialVersionUID = 1L;
 	private final int indexFrom;
 	private final int indexTo;

src/main/java/com/bitctrl/util/Timestamp.java

@@ -26,6 +26,7 @@
 
 package com.bitctrl.util;
 
+import java.io.Serial;
 import java.io.Serializable;
 import java.text.DateFormat;
 import java.text.ParseException;
@@ -42,6 +43,7 @@
  */
 public class Timestamp implements Serializable {
 
+	@Serial
 	private static final long serialVersionUID = 0L;
 
 	/**

src/main/java/com/bitctrl/util/TreeProperties.java

@@ -31,6 +31,7 @@
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.io.OutputStreamWriter;
+import java.io.Serial;
 import java.util.Date;
 import java.util.HashSet;
 import java.util.Properties;
@@ -140,6 +141,7 @@ public String toString() {
 
 	}
 
+	@Serial
 	private static final long serialVersionUID = 1L;
 	private static final char[] HEXDIGIT = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E',
 			'F' };

src/main/java/com/bitctrl/util/TwoDimensionalMap.java

@@ -1,5 +1,6 @@
 package com.bitctrl.util;
 
+import java.io.Serial;
 import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.Collection;
@@ -27,6 +28,7 @@
  * @author BitCtrl Systems GmbH, schnepel
  */
 public class TwoDimensionalMap<R, C, D> implements Serializable, ITwoDimensionalMap<R, C, D> {
+	@Serial
 	private static final long serialVersionUID = 3216584215464568453L;
 
 	private final Map<R, Integer> rows;

src/main/java/com/bitctrl/util/jar/JarVersionInfo.java

@@ -71,7 +71,7 @@ public static void main(final String[] args) {
 		files = new LinkedList<>(Arrays.asList(args));
 		if ("-short".equals(args[0])) {
 			onlyVersion = true;
-			files.remove(0);
+			files.removeFirst();
 		} else {
 			onlyVersion = false;
 		}