Question

JAVA 中<t>是什么意思，

public class Tree< T> {    private T data;     private Tree< T> left;     private Tree< T> right;     private Comparator< T> compator = null;      public Tree(T data, Comparator< T> compator) {        this.data = data;        this.left = null;        this.right = null;        this.compator = compator;    }Tree< T> 跟Comparator< T> compator着什么用

Answer 1

<T> 泛型。

Answer 2

泛型~

Answer 3

定义泛型