java.util.regex.PatternSyntaxException: Dangling meta character '+' near index 0 +- ^

Stack Overflow | SEVENTH | 8 months ago
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    Java error while using replaceAll("+-", "-")

    Stack Overflow | 8 months ago | SEVENTH
    java.util.regex.PatternSyntaxException: Dangling meta character '+' near index 0 +- ^
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    Java replaceAll - Replace "/**" with ""

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    java.util.regex.PatternSyntaxException: Dangling meta character '*' near index 2 /** ^
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    Dangling Meta Character*

    Oracle Community | 1 decade ago | 807591
    java.util.regex.PatternSyntaxException: Dangling meta character '*' near index 0 * ^
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    Examples fail with RegEx exception

    GitHub | 3 years ago | fjenett
    java.util.regex.PatternSyntaxException: Unexpected internal error near index 1 \ ^
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    Not work for version 2.21 and later

    GitHub | 2 years ago | qianlvable
    java.util.regex.PatternSyntaxException: Unexpected internal error near index 1 \ ^

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Root Cause Analysis

  1. java.util.regex.PatternSyntaxException

    Dangling meta character '+' near index 0 +- ^

    at java.util.regex.Pattern.error()
  2. Java RT
    String.replaceAll
    1. java.util.regex.Pattern.error(Unknown Source)
    2. java.util.regex.Pattern.sequence(Unknown Source)
    3. java.util.regex.Pattern.expr(Unknown Source)
    4. java.util.regex.Pattern.compile(Unknown Source)
    5. java.util.regex.Pattern.<init>(Unknown Source)
    6. java.util.regex.Pattern.compile(Unknown Source)
    7. java.lang.String.replaceAll(Unknown Source)
    7 frames
  3. fr.genius.main
    Main.calcTrinome
    1. fr.genius.main.Main.signSimplify(Main.java:108)
    2. fr.genius.main.Main.calcTrinome(Main.java:88)
    2 frames