Class DemoChangeChemCompProvider

This demo shows how to use an alternative ChemCompProvider. The default mechanism in BioJava is to access chemical componentsby using the DownloadChemCompProvider. It fetches and locally caches chemical component definitions as they are encountered during file parsing. It can be enabled by using the

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FileParsingParameters#setLoadChemCompInfo(boolean)

method. The AllChemCompProvider downloads and unpacks all chemcomps. It is slower and requires more memory than the default DownloadChemCompProvider, but it avoids network access to the FTP site, if a new chemcomp is detected, that has not been downloaded yet. Since all chemcomps will be kept in memory, the standard memory that is available to a JVM will not be sufficient in order to run this demo. Please start with -Xmx200M