kongkong的专栏

Preconditions工具函数 checkNotNull String name = null; Preconditions.checkNotNull(name,"name must be not null !"); checkState int state = 5; Preconditions.checkState(state==5,"state must be 5"); checkArgument int state = 5; Preconditions.checkArgument(state=

  package com.kq.guava.stopwatch; import com.google.common.base.Stopwatch; import java.util.concurrent.TimeUnit; /** * Created by kq on 18/9/29. */ public class StopWatchDemo { public sta...

  1.  手工put Cache<String,String> cache = CacheBuilder.newBuilder() .maximumSize(1000) .expireAfterWrite(2L, TimeUnit.SECONDS) .build(); String key = "king"; String value = cache.getIfPresen...