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Asked: 2026-05-17T20:29:04+00:00

I’m creating a Web Start application which would benefit from some of the newer

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I’m creating a Web Start application which would benefit from some of the newer JVM options (especially escape analysis, G1 garbage collector etc.)

At the same time, I would like the application to work gracefully on older JVMs that do not support these options.

Is there a good way of achieving this?

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1 Answer

  1. Editorial Team

    As Thorbjørn mentioned, Java 6 u10 allows multiple j2se elements in JNLP. The JNLP File Syntax resources section of the latest Java Web Start Developer’s Guide, indicates that multiple j2se elements, each with java-vm-args attributes can be specified with the most preferred occurring first. For example: 

    <j2se version="1.3" initial-heap-size="64m" max-heap-size="128m"/>
<j2se version="1.4.2+" href="http://java.sun.com/products/autodl/j2se" 
      java-vm-args="-esa -Xnoclassgc"/>
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