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Update 30. 优先使用泛型方法.md

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docs/notes/30. 优先使用泛型方法.md
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@ -114,18 +114,13 @@ public static <E extends Comparable<E>> E max(Collection<E> c);
```java ```java
// Returns max value in a collection - uses recursive type bound // Returns max value in a collection - uses recursive type bound
public static <E extends Comparable<E>> E max(Collection<E> c) { public static <E extends Comparable<E>> E max(Collection<E> c) {
if (c.isEmpty())
if (c.isEmpty()) throw new IllegalArgumentException("Empty collection");
throw new IllegalArgumentException("Empty collection"); E result = null;
for (E e : c)
E result = null; if (result == null || e.compareTo(result) > 0)
result = Objects.requireNonNull(e);
for (E e : c) return result;
if (result == null || [e.compareTo(result](http://e.compareTo(result)) > 0)
result = Objects.requireNonNull(e);
return result;
} }
``` ```