WebDec 9, 2024 · 其中allocateDirect分配的字节缓冲区用中文叫做直接缓冲区(DirectByteBuffer),用allocate分配的ByteBuffer叫做堆字节缓冲区 … WebSep 19, 2024 · The allocateDirect() method of java.nio.ByteBuffer class is used Allocates a new direct byte buffer. The new buffer’s position will be zero, its limit will be its …
Notes on using HeapByteBuffer for in-heap memory - SoByte
WebJava ByteBuffer allocateDirect ()用法及代码示例. 使用java.nio.ByteBuffer类的allocateDirect ()方法分配新的直接字节缓冲区。. 新缓冲区的位置将为零,其极限将是其 … WebOct 8, 2024 · Today we share a pitfall that many people tend to step in: the use of HeapByteBuffer. ByteBuffer has two main implementation classes HeapByteBuffer In-heap memory DirectByteBuffer Off-heap memory In my personal experience, I tend to use DirectByteBuffer in most cases, both for read and write operations, mainly because … healthy body healthy mind healthy life
Java零拷贝四步曲——HeapByteBuffer与DirectByteBuffer - 掘金
WebDirectByteBuffer is special implementation of ByteBuffer that has no byte [] laying underneath. We can allocate such ByteBuffer by calling: ByteBuffer directBuffer = ByteBuffer.allocateDirect (16); This operation will allocate 16 bytes of memory. The contents of direct buffers may reside outside of the normal garbage-collected heap. WebJul 15, 2024 · ByteBuffer的容量,这个值在ByteBuffer初始化的时候就确定下来了。不论是在读还是在写模式下,这个值都不变。 position. 写模式下: 该值表示当前写到了ByteBuffer的哪个位置,ByteBuffer初始化时,这个值为0。 position的最大值为capacity-1。 读模式下: WebJul 15, 2024 · ByteBuffer的容量,这个值在ByteBuffer初始化的时候就确定下来了。不论是在读还是在写模式下,这个值都不变。 position. 写模式下: 该值表示当前写到 … good gym exercises for golfers