检索集合中的内容是否存在,存在返回1,不存在返回-1
private static void test04() {
List<String> all = new ArrayList<>();
Collections.addAll(all, "q", "f", "z");
int point = Collections.binarySearch(all, "f");// 检索内容
System.out.println(point);
point = Collections.binarySearch(all, "LA");// 检索内容,内容不存在
System.out.println(point);
}
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