java編程將壹個99乘法表輸出到文件中

package controller;

import java.io.*;

public class IODemo {

public static void main(String[] args)throws IOException {

File file = new File("d:/九九乘法表.txt");

OutputStream output = new FileOutputStream(file);

String str = "";

for(int i=1;i<10;i++){

for(int j=1;j<=i;j++){

str+=j+"*"+i+"="+i*j+"\t";

}

str+="\r\n";

}

System.out.println(str);

output.write(str.getBytes());

System.out.println("寫入成功！");

//不用了記得關掉

output.close();

}

}