asmhatreandClaude Sonnet 5
f59c1de96d
Co-Authored-By: Claude Sonnet 5 <[email protected]> Claude-Session: https://claude.ai/code/session_01B38FGKKam5SCGgwgduVAh3
27 lines
1.0 KiB
Plaintext
27 lines
1.0 KiB
Plaintext
# _ (unnamed variables and patterns) and compact source files with instance main()
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$ javac UnnamedVariables.java (JDK 21, no flag)
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<repo>/lanes/src/UnnamedVariables.java:12: error: unnamed variables are a preview feature and are disabled by default.
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if (o instanceof Point(int x, _)) {
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^
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(use --enable-preview to enable unnamed variables)
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1 error
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exit=1
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$ javac UnnamedVariables.java (JDK 25, no flag)
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exit=0
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$ java UnnamedVariables (JDK 25)
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matched a Point, x = 3, y ignored with _
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caught NumberFormatException without naming it
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$ java CompactHello.java (JDK 21, no flag)
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<repo>/lanes/src/CompactHello.java:1: error: unnamed classes are a preview feature and are disabled by default.
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void main() {
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^
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(use --enable-preview to enable unnamed classes)
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1 error
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error: compilation failed
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$ java CompactHello.java (JDK 25, no flag)
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compact source file: no class, no static, no String[] args
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