GenericBuilder.java

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CompletableFuture.java

StreamCollector.java

GenericBuilder.java

RecordPattern.java

VirtualThread.java

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GenericBuilder.java

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class Builder<T> {↵

private T obj;↵

public <U> Builder<T> set(Function<T, U> fn, U val) {↵

apply(obj, fn, val);↵

return this;↵

}↵

public T build() { return obj; }↵

}

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関連する練習問題

CompletableFuture.java StreamCollector.java RecordPattern.java VirtualThread.java