To set the arrow that shows the direction in which the column is sorted, the setSortDirection(int direction) method of the Tree class is called (lines 36 to 37).

要设置显示列的排序方向的箭头，可以调用 Tree 类的 setSortDirection(int direction) 方法（第 36、37 行）。

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The disadvantage of using instanceof checks in this fashion is that, if we were to add another subclass of Tree (such as, a LeafWithValue class), we would have to revise these instanceof checks.

以这种方式使用instance of检查语句的一个缺点是，如果我们要添加Tree的另一个子类(比如一个leafwithvalue类)，我们将不得不修改这些instance of检查语句。

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Figure 5 demonstrates the process of generating an inheritance tree class diagram.

图5展示了产生一个继承树类图的过程。

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Yarnall also has her own network of "wood scouts, " who call whenever they find a world-class tree.

FORBES: Trees with souls

This inviolate "death and taxes" truth sustained me--a peace-loving granny, a tree-hugging liberal--through 64 years of protected, upper-middle-class subsistence.

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