What class does java use to read and write files?
Java reads and writes files mainly using classes in the java.io package. Commonly used classes include: 1. File: used to represent the path name of a file or directory; 2. FileReader and FileWriter: used to read and write character streams; 3. BufferedReader and BufferedWriter: provide buffering functions for more efficient reading. Write files; 4. FileInputStream and FileOutputStream: used to read and write byte streams, etc.
Operating system for this tutorial: Windows 10 system, Dell G3 computer.
In Java, reading and writing files mainly uses classes in the java.io package. Commonly used classes include:
#File: used to represent the path name of a file or directory.
FileReader and FileWriter: used to read and write character streams.
BufferedReader and BufferedWriter: Provide buffering functions to read and write files more efficiently.
FileInputStream and FileOutputStream: used to read and write byte streams.
InputStreamReader and OutputStreamWriter: used to convert between character streams and byte streams.
Here is a simple example demonstrating how to use these classes to read and write files:
java
import java.io.*;
public class FileExample {
public static void main(String[] args) {
try {
// 创建文件对象
File file = new File("example.txt");
// 创建文件读取器
FileReader fr = new FileReader(file);
BufferedReader br = new BufferedReader(fr);
// 读取文件内容并输出到控制台
String line;
while ((line = br.readLine()) != null) {
System.out.println(line);
}
// 关闭文件读取器
br.close();
// 创建文件写入器
FileWriter fw = new FileWriter(file);
BufferedWriter bw = new BufferedWriter(fw);
// 写入文件内容
bw.write("Hello World!");
// 关闭文件写入器
bw.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}The above is the detailed content of What class does java use to read and write files?. For more information, please follow other related articles on the PHP Chinese website!
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