import java.io.*;

public class Main {

    public static void main(String[] args) throws FileNotFoundException

    {

        PrintStream ps = new PrintStream(new FileOutputStream("work.txt"));

        //改变输出流，输出到work.txt文件

        System.setOut(ps);

        //用System.out.println()即可将内容输出到文件中

        System.out.println(12);

        double d = 2.36;

        System.out.println(d);

        System.out.print("可以吗");

        System.out.println("很厉害的样子");

    }

}