NIO中的Buffer

转载于 2017-07-03 11:09:00 发布 · 52 阅读

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原文链接：http://www.cnblogs.com/vayci/p/7110150.html

本文详细介绍了 Java NIO 中 Buffer 类的内部实现原理，包括 mark、position、limit 和 capacity 的概念及使用方法。提供了 clear()、flip() 和 rewind() 方法的具体实现，帮助读者深入理解 Buffer 的工作流程。

public abstract class Buffer {

    // Invariants: mark <= position <= limit <= capacity
    private int mark = -1;
    private int position = 0;
    private int limit;
    private int capacity;

    // Used only by direct buffers
    // NOTE: hoisted here for speed in JNI GetDirectBufferAddress
    long address;
　　 ......

clear

 public final Buffer clear() {
        position = 0;
        limit = capacity;
        mark = -1;
        return this;
    }

flip

 public final Buffer flip() {
        limit = position;
        position = 0;
        mark = -1;
        return this;
    }

rewind

public final Buffer rewind() {
        position = 0;
        mark = -1;
        return this;
    }

转载于:https://www.cnblogs.com/vayci/p/7110150.html