Java: warning: [removal] Character(char) in Character has been deprecated and marked for removal

[Ryan Carsten Schmidt]

These warnings appear when compiling the Java bindings on macOS 14:

build-project:
     [echo] linkgrammar: /Users/runner/work/link-grammar/link-grammar/bindings/java/build.xml
    [javac] Compiling 9 source files to /Users/runner/work/link-grammar/link-grammar/bindings/java/bin
    [javac] warning: [options] bootstrap class path not set in conjunction with -source 8
    [javac] warning: [options] source value 8 is obsolete and will be removed in a future release
    [javac] warning: [options] target value 8 is obsolete and will be removed in a future release
    [javac] warning: [options] To suppress warnings about obsolete options, use -Xlint:-options.
    [javac] /Users/runner/work/link-grammar/link-grammar/bindings/java/org/linkgrammar/JSONReader.java:42: warning: [removal] Character(char) in Character has been deprecated and marked for removal
    [javac]         escapes.put(new Character('"'), new Character('"'));
    [javac]                     ^
    [javac] /Users/runner/work/link-grammar/link-grammar/bindings/java/org/linkgrammar/JSONReader.java:42: warning: [removal] Character(char) in Character has been deprecated and marked for removal
    [javac]         escapes.put(new Character('"'), new Character('"'));
    [javac]                                         ^
    [javac] /Users/runner/work/link-grammar/link-grammar/bindings/java/org/linkgrammar/JSONReader.java:43: warning: [removal] Character(char) in Character has been deprecated and marked for removal
    [javac]         escapes.put(new Character('\\'), new Character('\\'));
    [javac]                     ^
    [javac] /Users/runner/work/link-grammar/link-grammar/bindings/java/org/linkgrammar/JSONReader.java:43: warning: [removal] Character(char) in Character has been deprecated and marked for removal
    [javac]         escapes.put(new Character('\\'), new Character('\\'));
    [javac]                                          ^
    [javac] /Users/runner/work/link-grammar/link-grammar/bindings/java/org/linkgrammar/JSONReader.java:44: warning: [removal] Character(char) in Character has been deprecated and marked for removal
    [javac]         escapes.put(new Character('/'), new Character('/'));
    [javac]                     ^
    [javac] /Users/runner/work/link-grammar/link-grammar/bindings/java/org/linkgrammar/JSONReader.java:44: warning: [removal] Character(char) in Character has been deprecated and marked for removal
    [javac]         escapes.put(new Character('/'), new Character('/'));
    [javac]                                         ^
    [javac] /Users/runner/work/link-grammar/link-grammar/bindings/java/org/linkgrammar/JSONReader.java:45: warning: [removal] Character(char) in Character has been deprecated and marked for removal
    [javac]         escapes.put(new Character('b'), new Character('\b'));
    [javac]                     ^
    [javac] /Users/runner/work/link-grammar/link-grammar/bindings/java/org/linkgrammar/JSONReader.java:45: warning: [removal] Character(char) in Character has been deprecated and marked for removal
    [javac]         escapes.put(new Character('b'), new Character('\b'));
    [javac]                                         ^
    [javac] /Users/runner/work/link-grammar/link-grammar/bindings/java/org/linkgrammar/JSONReader.java:46: warning: [removal] Character(char) in Character has been deprecated and marked for removal
    [javac]         escapes.put(new Character('f'), new Character('\f'));
    [javac]                     ^
    [javac] /Users/runner/work/link-grammar/link-grammar/bindings/java/org/linkgrammar/JSONReader.java:46: warning: [removal] Character(char) in Character has been deprecated and marked for removal
    [javac]         escapes.put(new Character('f'), new Character('\f'));
    [javac]                                         ^
    [javac] /Users/runner/work/link-grammar/link-grammar/bindings/java/org/linkgrammar/JSONReader.java:47: warning: [removal] Character(char) in Character has been deprecated and marked for removal
    [javac]         escapes.put(new Character('n'), new Character('\n'));
    [javac]                     ^
    [javac] /Users/runner/work/link-grammar/link-grammar/bindings/java/org/linkgrammar/JSONReader.java:47: warning: [removal] Character(char) in Character has been deprecated and marked for removal
    [javac]         escapes.put(new Character('n'), new Character('\n'));
    [javac]                                         ^
    [javac] /Users/runner/work/link-grammar/link-grammar/bindings/java/org/linkgrammar/JSONReader.java:48: warning: [removal] Character(char) in Character has been deprecated and marked for removal
    [javac]         escapes.put(new Character('r'), new Character('\r'));
    [javac]                     ^
    [javac] /Users/runner/work/link-grammar/link-grammar/bindings/java/org/linkgrammar/JSONReader.java:48: warning: [removal] Character(char) in Character has been deprecated and marked for removal
    [javac]         escapes.put(new Character('r'), new Character('\r'));
    [javac]                                         ^
    [javac] /Users/runner/work/link-grammar/link-grammar/bindings/java/org/linkgrammar/JSONReader.java:49: warning: [removal] Character(char) in Character has been deprecated and marked for removal
    [javac]         escapes.put(new Character('t'), new Character('\t'));
    [javac]                     ^
    [javac] /Users/runner/work/link-grammar/link-grammar/bindings/java/org/linkgrammar/JSONReader.java:49: warning: [removal] Character(char) in Character has been deprecated and marked for removal
    [javac]         escapes.put(new Character('t'), new Character('\t'));
    [javac]                                         ^
    [javac] /Users/runner/work/link-grammar/link-grammar/bindings/java/org/linkgrammar/JSONReader.java:307: warning: [removal] Character(char) in Character has been deprecated and marked for removal
    [javac]                     Character value = escapes.get(new Character(c));
    [javac]                                                   ^
    [javac] 21 warnings

[Linas Vepštas]

Thanks. Fixed in #1532