ActionEvent B. TreeSelectionEvent C. AncestorEvent D. TreeModelEvent
A. TreeNode B. MutableTreeNode C. Node DefaultMutableTreeNode
A. isLeaf B. isNode C. isParent D. getLeaf
A. removeFromParent() B. removeAllChildren() C. remove(MutableTreeNode aChild) D. remove(int childIndex)
A. 树组件在java.awt包中 B. 树组件在javax.swing.tree包中 C. TreeNode是树节点的祖先接口 D. MutableTreeNode是TreeNode子接口 E. DefaultMutableTreeNode是MutableTreeNode接口的实现类
A. 对 B. 错
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