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我是新來prefuse所以我創建了一個玩具項目,但似乎我總是有麻煩讀取XML文件:prefuse可視化工具包,無法讀取XML文件
公共類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);
}
}
}
該地址是有效的,可以直接訪問。然而,無論我如何改變,我總是得到錯誤:
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)
請幫助我; - )!!!