Claude
ff6130bede
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
42 lines
1.9 KiB
Plaintext
42 lines
1.9 KiB
Plaintext
$ 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
|