Question

I basically have a program that filters records from one excel file to another excel file using the apache poi. My program runs fine when it runs using netbeans. However, upon doing a clean and build and double clicking the .jar file inside the dist folder, it runs for very long( too long!) and gives me the following error( that I got by running the program from command prompt ).

Is there any work around for it? I have already increase the heap size to be -Xms1500m inside netbeans before cleaning and building.

Exception in thread "AWT-EventQueue-0" java.lang.OutOfMemoryError: Java heap space
    at org.apache.xmlbeans.impl.store.Saver$TextSaver.resize(Saver.java:1592)
    at org.apache.xmlbeans.impl.store.Saver$TextSaver.preEmit(Saver.java:1223)
    at org.apache.xmlbeans.impl.store.Saver$TextSaver.emit(Saver.java:1144)
    at org.apache.xmlbeans.impl.store.Saver$TextSaver.emitElement(Saver.java:926)
    at org.apache.xmlbeans.impl.store.Saver.processElement(Saver.java:456)
    at org.apache.xmlbeans.impl.store.Saver.process(Saver.java:307)
    at org.apache.xmlbeans.impl.store.Saver$TextSaver.saveToString(Saver.java:1727)
    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:1455)
    at org.apache.poi.xssf.model.SharedStringsTable.getKey(SharedStringsTable.java:130)
    at 

org.apache.poi.xssf.model.SharedStringsTable.addEntry(SharedStringsTable.java:176)
    at org.apache.poi.xssf.usermodel.XSSFCell.setCellType(XSSFCell.java:755)

    at equity.EquityFrame_Updated.copyRowsFromOldToNew(EquityFrame_Updated.java:646)
    at equity.EquityFrame_Updated.init(EquityFrame_Updated.java:133)
    at equity.EquityFrame_Updated.createAndShowGUI(EquityFrame_Updated.java:71)
    at equity.EquityFrame_Updated.<init>(EquityFrame_Updated.java:50)
    at equity.FileOpener.generateButtonPressed(FileOpener.java:160)
    at equity.FileOpener.access$100(FileOpener.java:17)
    at equity.FileOpener$2.actionPerformed(FileOpener.java:61)
    at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
    at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
    at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
    at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
    at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
    at java.awt.Component.processMouseEvent(Unknown Source)
    at javax.swing.JComponent.processMouseEvent(Unknown Source)
    at java.awt.Component.processEvent(Unknown Source)
    at java.awt.Container.processEvent(Unknown Source)
    at java.awt.Component.dispatchEventImpl(Unknown Source)
    at java.awt.Container.dispatchEventImpl(Unknown Source)
    at java.awt.Component.dispatchEvent(Unknown Source)

Answer 1

The ‘-Xms1500m’ flag is a runtime flag, not a compile time flag. You’ve set it inside Netbeans, so it only gets that flag when you run through Netbeans.

When you run the program outside of Netbeans, you need to run it like so:

java -Xms1500m -jar [your program here].