import java.io.BufferedOutputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
public class Demo {
public static void main(String[] args) throws IOException {
BufferedOutputStream bis = new BufferedOutputStream(new FileOutputStream("java.txt"));
ArrayList<Integer> array = new ArrayList<>();
while(array.size()<100){
int i = (int)(Math.random()*100)+1;
if(!array.contains(i)){
array.add(i);
}
}
System.out.println(array.size());
for(Integer i:array){
System.out.println(i);
bis.write(String.valueOf(i).getBytes());
bis.write("\r\n".getBytes());
}
bis.close();
}
}
用字节流存进去,显示的也是数字啊 |