请问DefaultMutableTreeNode是import什么东东??编译是出错:
"SchemaviewFrame.java": Error #: 300 : class DefaultMutableTreeNode not found in class schemaview.SchemaviewFrame at line 24, column 3
"SchemaviewFrame.java": Error #: 300 : class DefaultMutableTreeNode not found in class schemaview.SchemaviewFrame at line 24, column 3
在线等!!~~高手