import java.io.*;import javax.swing.*;import java.lang.*;import static javax.swing.JFrame.*;public class Main {	public static void main(String args[]) {		try {			String t[] = { "小明，男，20", "小红，女，21", "小刚，男，29" };			FileWriter fr = new FileWriter("A.txt");//这里也可以用File来构造			BufferedWriter br = new BufferedWriter(fr);//利用FileReader来构造			for (String s : t) {				br.write(s);				br.newLine();//腐乳换行			}			br.close();			fr.close();			FileReader fr1 = new FileReader("A.txt");			BufferedReader br1 = new BufferedReader(fr1);			String s = br1.readLine();			while (s != null) {				System.out.println(s);				s = br1.readLine();			}			br1.close();			fr1.close();		} catch (IOException e) {			System.out.println(e.getMessage());		}	}}