Java heap space

jvm：
-Xmx1000M
-Xms1000M
-XX:-PrintGCDetails
-XX:+HeapDumpOnOutOfMemoryError
-XX:HeapDumpPath=C:\Users\LYCIT\Desktop

demo：

public static void main(String[] args) throws IOException {
File file = new File("C:\\Users\\LYCIT\\Desktop
test.pdf");
final PDDocument load = PDDocument.load(file, MemoryUsageSetting.setupTempFileOnly(-1)
.setTempDir(new File("D:\\fcs
test")));
PDFRenderer renderer = new PDFRenderer(load);
renderer.setSubsamplingAllowed(true);
float scale = 1.2f;
try

{ BufferedImage bufferedImage = renderer.renderImage(0, scale, ImageType.RGB); }

catch (Exception e)

{ System.out.println(e); }

}