| 发表于:2007-03-08 16:58:28 楼主 |
public class typicalconditiontreenode:treenode { public typicalconditiontreenode(){} public void addornode() { typicalconditiontreenode node = (typicalconditiontreenode)clone(); node.text = "条件 "; this.parent.nodes.insert(0, node); } } typicalconditiontreenode node = (typicalconditiontreenode)clone(); 出错。没有为该对象定义无参数的构造函数。 如果用memberwiseclone则无法将该节点加入到树中。 哪位大虾能告诉我如何克隆从treenode继承的类对象? |
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