androidapplicationsarchitectureareasbridgingbytecodeclasscodecollectionconceptsconcurrentdeepdemystifieddemystifyingdevelopmentdifferencesdiveefficientessentialexecutionexplainedexploringgarbagehighjavajdkjrelanguagelanguagesmachinemanagementmasteringmemorymethodmonitoringnativeobjectoptimizingperformancepoweringprogrammingprojectruntimesoftwarestructuretuningunderstandingvirtual