CS计算机代考程序代写 Java import java.io.FileReader;

import java.io.FileReader;
import java.io.BufferedReader;
import java.io.FileWriter;
import java.io.PrintWriter;

public class FileReadWrite {
public static void main(String[] args) {

try (BufferedReader br = new BufferedReader(new FileReader(“input.txt”));
PrintWriter pw = new PrintWriter(new FileWriter(“output.txt”))) {

String text;

while ((text = br.readLine()) != null) {
pw.println(text.toLowerCase());
}

} catch (Exception e) {
e.printStackTrace();
}

}
}