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@Override
public void visitNode(Tree tree) {
    if (tree instanceof VariableTree) {
        VariableTree variableTree = (VariableTree) tree;
		System.out.println(variableTree.symbol().type().fullyQualifiedName());
    }
}

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@Override
public void visitNode(Tree tree) {
    //获取该节点开始行，例如某方法的第一行行号
    System.out.println(tree.firstToken().line());
    //获取该节点结束行，例如某方法的最后一行行号
    System.out.println(tree.lastToken().line());
}