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我是新来prefuse所以我创建了一个玩具项目,但似乎我总是有麻烦读取XML文件:prefuse可视化工具包,无法读取XML文件
公共类testProfusion {
public static void main(String[]args){
Graph graph = null;
try {
graph = new GraphMLReader().readGraph("http://www.w3schools.com/xml/note.xml");
} catch (DataIOException e) {
e.printStackTrace();
System.err.println("Error loading graph. Exiting...");
System.exit(1);
}
}
}
该地址是有效的,可以直接访问。然而,无论我如何改变,我总是得到错误:
at prefuse.data.io.GraphMLReader.readGraph(Unknown Source)
at prefuse.data.io.AbstractGraphReader.readGraph(Unknown Source)
at testProfusion.main(testProfusion.java:13)
Caused by: java.lang.NullPointerException
at prefuse.data.io.GraphMLReader$GraphMLHandler.endDocument(Unknown Source)
请帮助我; - )!!!