import java.io.*;
public class app13_4 {
public static void main(String[] args)throws IOException{
FileWriter fw=new FileWriter("G:\\JAVA\\文件的写入,BufferedWriter\\random.txt");
BufferedWriter bfw=new BufferedWriter(fw);
for(int i=1;i<5;i++){
bfw.write(Double.toString(Math.random()));
bfw.newLine();
}
fw.flush();
fw.close();
}
}
0.23938937978429542
0.5981693255568638
0.9560544911839771
你的For只循环4次,不是5次,因此只能得到4个随机数