Consumption of memory

[Daniel]

I want to measure the consumption of memory that implies certain action (upload a pdf with the library pdfbox), with the purpose of to determine in approximate form (to know if it puts all the pdf in single memory or the structure of this).

[Eric]

Try something like that:

System.out.println(Runtime.getRuntime().freeMemory());     
long memoryBefore = Runtime.getRuntime().freeMemory();
PDDocument document = PDDocument.load("c:\\01.pdf");
long memoryAfter = Runtime.getRuntime().freeMemory();
System.out.println( (memoryBefore -long memoryAfter));