How to read 1.5GB XML file without OutOfMemoryError and assign it to a string? [duplicate]

Question

I have approximate 1.5 gigabyte xml file and I want to read this large file. But I'm getting following error .

UPDATE : I want to read this xml after above processing assign a string

Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
    at java.util.Arrays.copyOf(Unknown Source)
    at java.lang.AbstractStringBuilder.expandCapacity(Unknown Source)
    at java.lang.AbstractStringBuilder.ensureCapacityInternal(Unknown Source)
    at java.lang.AbstractStringBuilder.append(Unknown Source)
    at java.lang.StringBuilder.append(Unknown Source)
    at gercek.FileToArrayOfBytes.main(FileToArrayOfBytes.java:28)

if you can analyze your document in one pass, use a SAX Parser (recommended). If you cannot, increase the heap size with the corresponding jvm option. — Arnaud Denoyelle
– Arnaud Denoyelle, Commented Apr 7, 2016 at 16:23
You can increase the heap size with the -Xmx command-line option. — Andy Thomas
– Andy Thomas, Commented Apr 7, 2016 at 16:24

KayV · Accepted Answer · 2016-04-07 16:35:44Z

3

The best way to read a large xml file is to use the SAX Parser. It is efficient in the sense that it does not load the complete file at once. And thus you can get rid of outofmemoryexception.

edited Apr 7, 2016 at 16:35

answered Apr 7, 2016 at 16:29

KayV

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2 Comments

java.nazif Over a year ago

Karan Verma :) it is not answer but I will give you vote point :) But again I will look it.

Andreas Over a year ago

Suggest using StAX, not SAX. It's so much easier to use.

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