PDFBox Pagebreak strange Nullpointer exception
- by schneiti
I currently try printing out text on multiple pages. For this, I count the number of rows and when they reach a fixed amount a method called pagebreakis executed. After the first pagebreak, when I try setting a font using contentstream.setFont(PDType1Font.HELVETICA, 12); it yields the following errormessage occuring at the described setFont-row.
java.lang.NullPointerException at org.apache.pdfbox.pdmodel.edit.PDPageContentStream.setFont(PDPageContentStream.java:321)
at com.xy.deu.xy.abc.db.schemavergleich.PDFDocumenter.drawBGCS(PDFDocumenter.java:781)
at com.xy.deu.xy.abc.db.schemavergleich.PDFDocumenter.createPDFDocumentation(PDFDocumenter.java:205)
at com.xy.deu.xy.abc.db.schemavergleich.MainClass.createPDFandOutput(MainClass.java:361)
at com.xy.deu.xy.abc.db.schemavergleich.MainClass.start(MainClass.java:231)
at com.xy.deu.xy.abc.db.schemavergleich.MainClass.main(MainClass.java:180)
Below is the code that gets executed as the error occurs.
...
// If Table gets to long for a page -> pagebreak:
if(currentLines > 37) {
pageBreak(currentLinePos); // TODO Currently causing app to crash
}
...
private void pageBreak(int currentLine) throws Exception {
contentStream.endText();
contentStream.close();
// Create new page
page = new PDPage(PDPage.PAGE_SIZE_A4);
doc.addPage( page );
// Create a new font object selecting one of the PDF base fonts
font = PDType1Font.HELVETICA;
// Start a new content stream which will "hold" the to be created content
contentStream = new PDPageContentStream(doc, page);
currentLines = 0;
mediabox = page.findMediaBox();
contentStream.beginText();
contentStream.moveTextPositionByAmount(startX, startY);
contentStream.setFont(PDType1Font.HELVETICA, 12);
}
Now comes the strange thing: Debugging yields into nothing that is not set. I'll attach a screenshot for you right at the position where the error occurs:
