apache poi - java.lang.OutOfMemoryError: Java heap space for 100000 records -


trying write excel file using following code 

public static void main(string[] args)      {           xssfworkbook workbook = new xssfworkbook();               xssfsheet sheet = workbook.createsheet("book data");              map<string, object[]> data = new treemap<string, object[]>();             data.put("1", new object[] {"id", "name", "lastname"});             for(int i=2;i<100000;i++)             {                                data.put(string.valueof(i), new object[] {i, "name"+i, "lastname"+i});             }              set<string> keyset = data.keyset();             int rownum = 0;             (string key : keyset)             {                 row row = sheet.createrow(rownum++);                 object [] objarr = data.get(key);                 int cellnum = 0;                 (object obj : objarr)                 {                    cell cell = row.createcell(cellnum++);                    if(obj instanceof string)                         cell.setcellvalue((string)obj);                     else if(obj instanceof integer)                         cell.setcellvalue((integer)obj);                 }             }             try             {                  fileoutputstream out = new fileoutputstream(new file("d:\\nameandlname.xlsx"));                 workbook.write(out);                 out.close();                 system.out.println("nameandlname.xlsx written successfully.");             }              catch (exception e)              {                 e.printstacktrace();             }     }

vm arguments -xms512m -xmx1024m

eclipse.ini:

-startup plugins/org.eclipse.equinox.launcher_1.1.0.v20100507.jar --launcher.library plugins/org.eclipse.equinox.launcher.win32.win32.x86_1.1.1.r36x_v20100810 -product org.eclipse.epp.package.jee.product --launcher.defaultaction openfile --launcher.xxmaxpermsize 1024m -showsplash org.eclipse.platform --launcher.xxmaxpermsize 256m --launcher.defaultaction openfile -vmargs -dosgi.requiredjavaversion=1.5 -xms512m -xmx1024m -vm c:/program files (x86)/java/jdk1.6.0_21/bin/javaw.exe

and error getting:

exception in thread "main" java.lang.outofmemoryerror: java heap space     @ org.apache.xmlbeans.impl.store.saver$textsaver.resize(saver.java:1592)     @ org.apache.xmlbeans.impl.store.saver$textsaver.preemit(saver.java:1223)     @ org.apache.xmlbeans.impl.store.saver$textsaver.emit(saver.java:1144)

what need sxssf (streaming usermodel api).

sxssf (package: org.apache.poi.xssf.streaming) api-compatible streaming extension of xssf used when large spreadsheets have produced, , heap space limited.

there example on page too: need substitute xssfworkbook sxssfworkbook.


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