Import java.io.bufferedreader;
Import java.io.bufferedwriter;
import Java . io . filenotfoundexception；
Import java.io.filereader;
Import java.io.filewriter;
Import java.io.ioexception;
Public class Test 1 {
//Write data to a file
Public static void writeToFile (string path)
Try {
buffered writer bw = new buffered writer(new file writer(path))；
int a = 100；
int b = 200
//You need to convert plastic into string type.
bw . write(string . value of(a))；
bw . flush()；
bw . newline()；
bw . flush()；
bw . write(string . value of(b))；
bw . flush()；
bw . close()；
} catch (IOException e) {
e . printstacktrace()；
}
}
//Open the file and display the contents of the file to the console.
Public static void readFile (string path)
Try {
buffered reader br = new buffered reader(new file reader(path))；
Try {
String line = null
while((line = br.readLine())！ = null){
system . out . println(line)；
}
} catch (IOException e) {
e . printstacktrace()；
}
} catch(file not found exception e){
e . printstacktrace()；
}
}
Public static void main(String[] args) {
write to file(" d:/sample . dat ")；
readFile(" d:/sample . dat ")；
}
}