How Java handles large files

1: we often use reading to the file stream and then performing operations in the stream. This is no problem for small files. For large files, because the file object needs to be converted into a stream, as long as the stream is used for large file operations, it will certainly overflow. Here we will introduce two methods, in fact, almost all

2: Memory ing in NIO. the maximum number of int values can be mapped at a time, which is 2 GB in 32 bits. Therefore, perform operations on these 2G resources. For details about the ing, refer to relevant materials and use randomaccessfile.
3: Use the randomaccessfile class, set the buffer, and read the buffer size bytes at a time.