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https://issues.apache.org/jira/browse/COLLECTIONS-849?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Volkmar W. Pogatzki updated COLLECTIONS-849:
--------------------------------------------
Description: javac -source 1.8 -target 1.8 -d target/classes -encoding
UTF-8 @sources.lst warning: [options] bootstrap class path not set in
conjunction with -source 8 warning: [options] source value 8 is obsolete and
will be removed in a future release warning: [options] target value 8 is
obsolete and will be removed in a future release warning: [options] To suppress
warnings about obsolete options, use -Xlint:-options.
src/main/java/org/apache/commons/collections4/trie/AbstractPatriciaTrie.java:1158:
error: lastEntry() in AbstractPatriciaTrie cannot implement lastEntry() in
SequencedMap TrieEntry<K, V> lastEntry() { ^ attempting to assign weaker access
privileges; was public where K#1,V#1,K#2,V#2 are type-variables: K#1 extends
Object declared in class AbstractPatriciaTrie V#1 extends Object declared in
class AbstractPatriciaTrie K#2 extends Object declared in interface
SequencedMap V#2 extends Object declared in interface SequencedMap
src/main/java/org/apache/commons/collections4/trie/AbstractPatriciaTrie.java:744:
error: firstEntry() in AbstractPatriciaTrie cannot implement firstEntry() in
SequencedMap TrieEntry<K, V> firstEntry() { ^ attempting to assign weaker
access privileges; was public where K#1,V#1,K#2,V#2 are type-variables: K#1
extends Object declared in class AbstractPatriciaTrie V#1 extends Object
declared in class AbstractPatriciaTrie K#2 extends Object declared in interface
SequencedMap V#2 extends Object declared in interface SequencedMap
src/main/java/org/apache/commons/collections4/trie/PatriciaTrie.java:65: error:
lastEntry() in AbstractPatriciaTrie cannot implement lastEntry() in
SequencedMap public class PatriciaTrie<V> extends AbstractPatriciaTrie<String,
V> { ^ attempting to assign weaker access privileges; was public where
K#1,V#1,K#2,V#2 are type-variables: K#1 extends Object declared in class
AbstractPatriciaTrie V#1 extends Object declared in class AbstractPatriciaTrie
K#2 extends Object declared in interface SequencedMap V#2 extends Object
declared in interface SequencedMap
src/main/java/org/apache/commons/collections4/list/AbstractLinkedList.java:340:
error: addLast(E#1) in AbstractLinkedList cannot implement addLast(E#2) in List
public boolean addLast(final E o) { ^ return type boolean is not compatible
with void where E#1,E#2 are type-variables: E#1 extends Object declared in
class AbstractLinkedList E#2 extends Object declared in interface List
src/main/java/org/apache/commons/collections4/list/AbstractLinkedList.java:335:
error: addFirst(E#1) in AbstractLinkedList cannot implement addFirst(E#2) in
List public boolean addFirst(final E o) { ^ return type boolean is not
compatible with void where E#1,E#2 are type-variables: E#1 extends Object
declared in class AbstractLinkedList E#2 extends Object declared in interface
List
src/main/java/org/apache/commons/collections4/list/NodeCachingLinkedList.java:44:
error: addLast(E#1) in AbstractLinkedList cannot implement addLast(E#2) in
List public class NodeCachingLinkedList<E> extends AbstractLinkedList<E>
implements Serializable { ^ return type boolean is not compatible with void
where E#1,E#2 are type-variables: E#1 extends Object declared in class
AbstractLinkedList E#2 extends Object declared in interface List
src/main/java/org/apache/commons/collections4/list/CursorableLinkedList.java:61:
error: addLast(E#1) in AbstractLinkedList cannot implement addLast(E#2) in
List public class CursorableLinkedList<E> extends AbstractLinkedList<E>
implements Serializable { ^ return type boolean is not compatible with void
where E#1,E#2 are type-variables: E#1 extends Object declared in class
AbstractLinkedList E#2 extends Object declared in interface List Note: Some
input files use or override a deprecated API. Note: Recompile with
-Xlint:deprecation for details. Note: Some input files use unchecked or unsafe
operations. Note: Recompile with -Xlint:unchecked for details. 7 errors
> Compilation with Java 21 fails with "error: addFirst(E#1) in
> AbstractLinkedList cannot implement addFirst(E#2) in List"
> -----------------------------------------------------------------------------------------------------------------------
>
> Key: COLLECTIONS-849
> URL: https://issues.apache.org/jira/browse/COLLECTIONS-849
> Project: Commons Collections
> Issue Type: Bug
> Components: Core
> Affects Versions: 3.2.2, 4.4
> Reporter: Volkmar W. Pogatzki
> Priority: Major
> Attachments: build.log
>
>
> javac -source 1.8 -target 1.8 -d target/classes -encoding UTF-8 @sources.lst
> warning: [options] bootstrap class path not set in conjunction with -source 8
> warning: [options] source value 8 is obsolete and will be removed in a future
> release warning: [options] target value 8 is obsolete and will be removed in
> a future release warning: [options] To suppress warnings about obsolete
> options, use -Xlint:-options.
> src/main/java/org/apache/commons/collections4/trie/AbstractPatriciaTrie.java:1158:
> error: lastEntry() in AbstractPatriciaTrie cannot implement lastEntry() in
> SequencedMap TrieEntry<K, V> lastEntry() { ^ attempting to assign weaker
> access privileges; was public where K#1,V#1,K#2,V#2 are type-variables: K#1
> extends Object declared in class AbstractPatriciaTrie V#1 extends Object
> declared in class AbstractPatriciaTrie K#2 extends Object declared in
> interface SequencedMap V#2 extends Object declared in interface SequencedMap
> src/main/java/org/apache/commons/collections4/trie/AbstractPatriciaTrie.java:744:
> error: firstEntry() in AbstractPatriciaTrie cannot implement firstEntry() in
> SequencedMap TrieEntry<K, V> firstEntry() { ^ attempting to assign weaker
> access privileges; was public where K#1,V#1,K#2,V#2 are type-variables: K#1
> extends Object declared in class AbstractPatriciaTrie V#1 extends Object
> declared in class AbstractPatriciaTrie K#2 extends Object declared in
> interface SequencedMap V#2 extends Object declared in interface SequencedMap
> src/main/java/org/apache/commons/collections4/trie/PatriciaTrie.java:65:
> error: lastEntry() in AbstractPatriciaTrie cannot implement lastEntry() in
> SequencedMap public class PatriciaTrie<V> extends
> AbstractPatriciaTrie<String, V> { ^ attempting to assign weaker access
> privileges; was public where K#1,V#1,K#2,V#2 are type-variables: K#1 extends
> Object declared in class AbstractPatriciaTrie V#1 extends Object declared in
> class AbstractPatriciaTrie K#2 extends Object declared in interface
> SequencedMap V#2 extends Object declared in interface SequencedMap
> src/main/java/org/apache/commons/collections4/list/AbstractLinkedList.java:340:
> error: addLast(E#1) in AbstractLinkedList cannot implement addLast(E#2) in
> List public boolean addLast(final E o) { ^ return type boolean is not
> compatible with void where E#1,E#2 are type-variables: E#1 extends Object
> declared in class AbstractLinkedList E#2 extends Object declared in interface
> List
> src/main/java/org/apache/commons/collections4/list/AbstractLinkedList.java:335:
> error: addFirst(E#1) in AbstractLinkedList cannot implement addFirst(E#2) in
> List public boolean addFirst(final E o) { ^ return type boolean is not
> compatible with void where E#1,E#2 are type-variables: E#1 extends Object
> declared in class AbstractLinkedList E#2 extends Object declared in interface
> List
> src/main/java/org/apache/commons/collections4/list/NodeCachingLinkedList.java:44:
> error: addLast(E#1) in AbstractLinkedList cannot implement addLast(E#2) in
> List public class NodeCachingLinkedList<E> extends AbstractLinkedList<E>
> implements Serializable { ^ return type boolean is not compatible with void
> where E#1,E#2 are type-variables: E#1 extends Object declared in class
> AbstractLinkedList E#2 extends Object declared in interface List
> src/main/java/org/apache/commons/collections4/list/CursorableLinkedList.java:61:
> error: addLast(E#1) in AbstractLinkedList cannot implement addLast(E#2) in
> List public class CursorableLinkedList<E> extends AbstractLinkedList<E>
> implements Serializable { ^ return type boolean is not compatible with void
> where E#1,E#2 are type-variables: E#1 extends Object declared in class
> AbstractLinkedList E#2 extends Object declared in interface List Note: Some
> input files use or override a deprecated API. Note: Recompile with
> -Xlint:deprecation for details. Note: Some input files use unchecked or
> unsafe operations. Note: Recompile with -Xlint:unchecked for details. 7 errors
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