try {
Document document = new Document();
PdfWriter.getInstance(document, new FileOutputStream("Report.pdf"));
document.open();
document.add(new Paragraph("Hello World"));
document.close();
} catch (Exception e) {
JOptionPane.showMessageDialog(null, e);
}
这是我在 NetBeans 中编写的代码,但在第一行出现错误:
error 1 in 1st line: Document is abstract; cannot be instantiated
error 2 in 2nd line cannot find symbol ,symbol: variable PdfWriter