Usage of bufferedreader in java

BufferedReader in Java is used to read text files efficiently. The specific steps include: creating a FileReader object to connect to the file. Create a BufferedReader object from a FileReader object. Use the readLine() method to read the file contents line by line. Read in a loop until readLine() returns null. Close the BufferedReader object.

Usage of BufferedReader in Java

BufferedReader is a buffer in Java for efficient reading of text files kind. It provides an easy way to read the contents of a file line by line while improving reading efficiency.

Usage

Using BufferedReader is divided into the following steps:

1. Create a FileReader object that will connect to the file to be read.
2. Pass a FileReader object to the BufferedReader constructor to create a BufferedReader object.
3. Use the readLine() method to read the file content, which will return the content of each line.
4. Loop to read the file until the readLine() method returns null.
5. Close the BufferedReader object.

Sample code

<code class="java">import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

public class BufferedReaderExample {

    public static void main(String[] args) {
        try {
            // 创建 FileReader 对象
            FileReader fileReader = new FileReader("myFile.txt");

            // 创建 BufferedReader 对象
            BufferedReader bufferedReader = new BufferedReader(fileReader);

            // 逐行读取文件内容
            String line;
            while ((line = bufferedReader.readLine()) != null) {
                // 处理每一行数据
            }

            // 关闭 BufferedReader 对象
            bufferedReader.close();
        } catch (IOException e) {
            // 处理异常
        }
    }
}</code>

Advantages

Using BufferedReader has the following advantages:

• High efficiency: It buffers file data, reduces the number of I/O operations on the disk, and increases reading speed.
• Easy to use: It provides a simple readLine() method to read the file content line by line.
• Exception handling: When reading a file, an IOException is thrown to allow easy handling of errors.

The above is the detailed content of Usage of bufferedreader in java. For more information, please follow other related articles on the PHP Chinese website!