IBM User Guide for Java V7 on Windows > Reference > Command-line options > -XX command-line options

-XX:[+|-]UseCompressedOops (64-bit only)

This option enables or disables compressed references in 64-bit JVMs, and is provided to help when porting applications from the Oracle JVM to the IBM JVM. This option might not be supported in subsequent releases.

-XX:[+|-]UseCompressedOops

The -XX:+UseCompressedOops option enables compressed references in 64-bit JVMs. The -XX:+UseCompressedOops option is similar to specifying -Xcompressedrefs, which is detailed in the topic JVM command-line options.

The -XX:-UseCompressedOops option prevents the use of compressed references in 64-bit JVMs.

Parent: -XX command-line options

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