在 Java 和 .net 中，默认的 int 都是 32 位的。这是否与当 java 和 .net 出现时，大多数使用的处理器都是 32 位的事实有关？还是有其他原因选择 32 作为整数的默认位长？
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是的，这主要是因为大多数处理器都是 32 位的。这也显示在 Java 规范的其他部分。例如，明确不保证long和double（64 位）读取和写入是原子的，而对于所有其他原始类型，它是原子的。
于 2013-03-17T21:40:38.850 回答
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Java was based on C and some C++.
In C char is 8-bit, short is 16-bit and a long long is 64-bit. An int could be 16-bit or 32-bit but for simplicity in Java they decided on byte being 8-bit, short is 16-bit, int is 32-bit and long is 64-bit. In Java char is 16-bit unsigned.
In short, from C there were four types and four sizes and so int ended up being 32-bit.
于 2013-03-17T21:50:34.383 回答