Crud repository count number of items in a list

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  Java remove first character

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  Java.lang.RuntimeException: Duplicate class com.google.common.util.concurrent.ListenableFuture found in modules guava-20.0.jar (com.google.guava:guava:20.0) and listenablefuture-1.0.jar (com.google.guava:listenablefuture:1.0)

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  Java garbage collection

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  InetAddress.getByAddress example

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  Java add element to map

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