for (int f=0; f<9621; f++)
                {
                  Row row1 = sheet.createRow(f);
                           for (int g=0; g<4875; g++){
                                Cell cell = row1.createCell(g);
                                cell.setCellValue((String) row[f][g] );// line 155

Blockquote Exception in thread "main" java.lang.OutOfMemoryError: Java heap space at org.apache.xmlbeans.impl.store.Saver$TextSaver.resize(Saver.java:1700) at org.apache.xmlbeans.impl.store.Saver$TextSaver.preEmit(Saver.java:1303) at org.apache.xmlbeans.impl.store.Saver$TextSaver.emit(Saver.java:1190) at org.apache.xmlbeans.impl.store.Saver$TextSaver.emitElement(Saver.java:962) at org.apache.xmlbeans.impl.store.Saver.processElement(Saver.java:476) at org.apache.xmlbeans.impl.store.Saver.process(Saver.java:307) at org.apache.xmlbeans.impl.store.Saver$TextSaver.saveToString(Saver.java:1864) at org.apache.xmlbeans.impl.store.Cursor._xmlText(Cursor.java:546) at org.apache.xmlbeans.impl.store.Cursor.xmlText(Cursor.java:2436) at org.apache.xmlbeans.impl.values.XmlObjectBase.xmlText(XmlObjectBase.java:1500) at org.apache.poi.xssf.model.SharedStringsTable.getKey(SharedStringsTable.java:134) at org.apache.poi.xssf.model.SharedStringsTable.addEntry(SharedStringsTable.java:180) at org.apache.poi.xssf.usermodel.XSSFCell.setCellValue(XSSFCell.java:453) at org.apache.poi.xssf.usermodel.XSSFCell.setCellValue(XSSFCell.java:417) at files.EXP.main(EXP.java:155)