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update:demo4

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dichgrem
2025-11-28 16:59:17 +08:00
parent 41e6b71bd7
commit 5832b4fe9d
34 changed files with 307 additions and 0 deletions
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6
com/study/demo4/PaymentProcessor.java Normal file
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package com.study.demo4;
interface PaymentProcessor {
boolean pay(double amount);
}