这里的基本数据类型指short、int、long、float、double这种简单内置数据类型,因为它们都是和系统相关的,所以在不同的系统下取值可能不同,这务必引起我们的注意,尽量不要在这方面给自己程序的移植造成麻烦。 一般的,在32位编译环境中,sizeof(int)的取值为4。 5. 指针变量的sizeof 学过数据结构的你应该知道指针是一
而在C/C++中需要sizeof是因为移植,不同的数据类型在不同的机器上大小可能不同,程序员必须知道对应的数据类型大小。 详细介绍 Java数据类型 Java基本数据类型 int 32bit short 16bit long 64bit byte 8bit char 16bit float 32bit double 64bit boolean 1bit Java基本数据类型封装类 Integer // 4 byte Short ...
publicclassCalcsizeof {privatestaticRuntime rTime =Runtime.getRuntime();privatestaticlongusedMemory() {returnrTime.totalMemory() -rTime.freeMemory(); }privatestaticvoidrunGC() {for(inti = 0; i < 4; i++) {longusedMem1 =usedMemory();longusedMem2 =Long.MAX_VALUE;for(intj = 0; (us...
cout<<"sizeof(size_t)="<<sizeof(size_t)<<endl; 输出结果为: 正如预期的一样,size_t变成了unsigned long int ,占用8字节的内存空间。 总结:size_t的大小并非像很多网上描述的那样,其大小是由系统的位数决定的。size_t的大小是由你生成的程序类型决定的,只是生成的程序类型与系统的类型有一定关系。32bit...
Namespace: Java.Util Assembly: Mono.Android.dll Returns the number of elements in this list. C# 复制 [Android.Runtime.Register("size", "()I", "GetSizeHandler:Java.Util.IListInvoker, Mono.Android, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null")] public int Size(); Returns ...
// Returns the maximum amount of allocatable direct buffer memory.// The directMemory variable is initialized during system initialization// in the saveAndRemoveProperties method.//publicstaticlongmaxDirectMemory(){returndirectMemory;}//...// Save a private copy of the system properties...
Namespace: Java.Util Assembly: Mono.Android.dll Returns the number of elements in this deque. C# 複製 [Android.Runtime.Register("size", "()I", "GetSizeHandler:Java.Util.IDequeInvoker, Mono.Android, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null")] public int Size(); Returns...
if (contentLength == -1L || contentLength > (long)limit) { //这里是warn的原文 LOG.warn("Going to buffer response body of large or unknown size. Using getResponseBodyAsStream instead is recommended."); } LOG.debug("Buffering response body"); ...
commitLog.putMessages(messageExtBatch); long elapsedTime = this.getSystemClock().now() - beginTime; if (elapsedTime > 500) { log.warn("not in lock elapsed time(ms)={}, bodyLength={}", elapsedTime, messageExtBatch.getBody().length); } this.storeStatsService.setPutMessageEntireTime...
As of JE 6.4, an optional off-heap cache may be configured in addition to the main JE cache. SeeEnvironmentMutableConfig.setOffHeapCacheSize(long)for information about the trade-offs in using an off-heap cache. When the-offheapargument is specified, this utility displays sizing information for...