asmhatre/javademos
1
0
Fork 0
Code Actions Activity

Add sealed module: modelling domains with sealed types and exhaustive switch

Browse Source 
Payment model, permits and the three modifiers, default-branch trap, generic and recursive hierarchies, visitor comparison, run-time enforcement, modules. Transcripts from JDK 21, 25 and 27.

Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01TF9JWFvJSNm6HVzswzZU5a
This commit is contained in:
Claude
2026-09-24 12:03:59 +00:00
parent 65a4bbbbe3
commit ff6130bede
38 changed files with 638 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
sealed/output/06-visitor.txt
+41
View File
@@ -0,0 +1,41 @@
$ javac src/VisitorVersion.java && java VisitorVersion (21.0.10+7-Ubuntu-124.04)
Card[last4=4242, amount=500] -> fee 10
Upi[vpa=ankur@bank, amount=500] -> fee 0
NetBanking[bank=HDFC, amount=500] -> fee 15
$ javac src/VisitorVersion.java && java VisitorVersion (25.0.4.1+1-LTS)
Card[last4=4242, amount=500] -> fee 10
Upi[vpa=ankur@bank, amount=500] -> fee 0
NetBanking[bank=HDFC, amount=500] -> fee 15
$ javac src/VisitorVersion.java && java VisitorVersion (27+35)
Card[last4=4242, amount=500] -> fee 10
Upi[vpa=ankur@bank, amount=500] -> fee 0
NetBanking[bank=HDFC, amount=500] -> fee 15
$ javac broken/VisitorAdded.java (21.0.10+7-Ubuntu-124.04)
broken/VisitorAdded.java:9: error: Fee is not abstract and does not override abstract method visitWallet(Wallet) in Visitor
static class Fee implements Visitor<Long> {
^
broken/VisitorAdded.java:13: error: Label is not abstract and does not override abstract method visitWallet(Wallet) in Visitor
static class Label implements Visitor<String> {
^
2 errors
$ javac broken/VisitorAdded.java (25.0.4.1+1-LTS)
broken/VisitorAdded.java:9: error: Fee is not abstract and does not override abstract method visitWallet(Wallet) in Visitor
static class Fee implements Visitor<Long> {
^
broken/VisitorAdded.java:13: error: Label is not abstract and does not override abstract method visitWallet(Wallet) in Visitor
static class Label implements Visitor<String> {
^
2 errors
$ javac broken/VisitorAdded.java (27+35)
broken/VisitorAdded.java:9: error: Fee is not abstract and does not override abstract method visitWallet(Wallet) in Visitor
static class Fee implements Visitor<Long> {
^
broken/VisitorAdded.java:13: error: Label is not abstract and does not override abstract method visitWallet(Wallet) in Visitor
static class Label implements Visitor<String> {
^
2 errors