BufferedReader和Scanner之间的区别是:

BufferedReader reads data, but Scanner parses data. You can only read String using BufferedReader, using Scanner you can read to different data types like int. BufferedReader is older than Scanner, it was added on JDK 1.1, while Scanner was added on JDK 5 release. The buffer size of BufferedReader is larger (8KB) as compared to Scanner's 1KB. BufferedReader is more suitable for reading files with long String, while Scanner is more suitable for reading small user input from command prompt. BufferedReader is synchronized, while Scanner is not, which means you cannot share Scanner among multiple threads. BufferedReader is faster than Scanner because it doesn't spend time on parsing. BufferedReader is a bit faster as compared to Scanner. BufferedReader is from java.io package, while Scanner is from java.util package.

在此基础上，我们可以选择我们的选择。

感谢阅读!

BufferedReader和Scanner的区别如下:

BufferedReader已同步，但Scanner未同步。 BufferedReader是线程安全的，但Scanner不是。 BufferedReader有更大的缓冲内存，而Scanner有更小的缓冲内存。 BufferedReader执行速度更快，但Scanner执行速度较慢。 从控制台读取一行的代码:

BufferedReader:

InputStreamReader isr = new InputStreamReader(System.in);
BufferedReader br = new BufferedReader(isr);
String st = br.readLine();
       
// You can make the object InputStreamReader object inside the BufferReader method.
BufferReader br = new BufferedReader(InputStreamReader(System.in));
String st = br.readLine();

// You can even inspect the type of the input stream manually by using Parse method which accepts string parameter.
int x = Integer.parseInt(br.readLine());

// Or you can pass the object directly.
int x = Integer.parseInt(st);

扫描仪:

Scanner sc = new Scanner(System.in);
String st = sc.nextLine();

下面的答案来自从控制台读取:JAVA Scanner vs BufferedReader

当从控制台读取输入时，有两个选项可以实现这一点。首先使用Scanner，另一个使用BufferedReader。两者都有不同的特点。这意味着如何使用它的差异。

扫描器将给定的输入作为标记处理。BufferedReader只是将输入作为字符串逐行读取。Scanner本身提供了解析功能，就像nextInt()、nextFloat()一样。

但是，别人又有什么区别呢?

扫描器将给定的输入作为标记处理。BufferedReader作为流行/字符串。 使用正则表达式对给定输入进行扫描器标记化。使用BufferedReader必须编写额外的代码。 BufferedReader比Scanner更快。2 扫描仪未同步，BufferedReader已同步

从JDK 1.5及更高版本开始就有了Scanner。

什么时候应该使用扫描器，还是缓冲阅读器?

看看它们之间的主要区别，一个使用标记化，另一个使用流线。当您需要解析功能时，请改用Scanner。但是，我更喜欢BufferedReader。当您需要从文件中读取数据时，请使用BufferedReader，因为它在读取文件时使用缓冲内存，从而减少物理驱动器的使用。或者你可以使用BufferedReader作为Scanner的输入。

我建议使用BufferedReader来读取文本。扫描器隐藏IOException而BufferedReader立即抛出它。

BufferedReader和Scanner之间的区别是:

BufferedReader reads data, but Scanner parses data. You can only read String using BufferedReader, using Scanner you can read to different data types like int. BufferedReader is older than Scanner, it was added on JDK 1.1, while Scanner was added on JDK 5 release. The buffer size of BufferedReader is larger (8KB) as compared to Scanner's 1KB. BufferedReader is more suitable for reading files with long String, while Scanner is more suitable for reading small user input from command prompt. BufferedReader is synchronized, while Scanner is not, which means you cannot share Scanner among multiple threads. BufferedReader is faster than Scanner because it doesn't spend time on parsing. BufferedReader is a bit faster as compared to Scanner. BufferedReader is from java.io package, while Scanner is from java.util package.

在此基础上，我们可以选择我们的选择。

感谢阅读!

BufferedReader可能会给你更好的性能(因为Scanner是基于InputStreamReader，查看源代码)。哎呀，对于从文件中读取数据，它使用nio。当我测试nio的性能与大文件的BufferedReader性能时，nio显示出更好的性能。 要从文件中读取数据，请尝试Apache Commons IO。