add logseq-java
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36
logseq-java/pages/TreeSet.md
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36
logseq-java/pages/TreeSet.md
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- 一种树形结构的集合
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- [[二叉树]]结构
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- 每一个节点下最多两个分支
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- TreeSet结构为[[红黑二叉树]]
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- 通过红黑二叉数可提升操作和查询效率
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- 特点
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id:: 625fe239-5548-4c66-ba66-f6fb1629b682
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- 元素存储有序
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- 元素不能重复
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- 没有下标
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- [[API]]与HashSet一致
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- 排序
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- 借助 [[ArrayList]]排序
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- [[去重]]原理
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id:: 625fa874-b218-4044-ac16-b9de892cd9d2
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- 不依靠[[Hash]]Code及 [[equals]]
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- 依靠[[比较器]] [[Comparable]]
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- Key上一定要实现Comparable
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- ```java
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public class Girl implements Comparable<Girl> {
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private String name;
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private String id;
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@Override
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public int compareTo(Girl o) {
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if (this.equals(o)) {
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return 0;
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}
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if (this.name.equals(o.name)) {
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return this.id.compareTo(o.id);
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} else {
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return this.name.compareTo(o.name);
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}
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}
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}
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```
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- 和 [[HashSet]]的区别
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