Text I/O 书上的一道习题

[小公鸡卡哇伊呀~]

(Create a text file) Write a program to create a file named Exercise17_01.txt if it does not exist. Append new data to it if it already exists. Write 100 integers created randomly into the file using text I/O. Integers are separated by a space.

我写成下面这样，但是文件存在就append该怎么改呢？PrintWriter没有类似下面的构造函数。
FileOutputStream(file: File, append: boolean)
FileOutputStream(filename: String, append: boolean)

public class Class17_1 {
    public static void main(String[] args) throws IOException {  
        PrintWriter file = new PrintWriter("Exercise17_01.txt");
                Random r = new Random();
                for (int i = 0; i < 100; i++)
                    file.print(r.nextInt(100) + " ");    
        file.close();    
    }
}

谢谢啦

[stacksoverflow]

PrintWriter pw = new PrintWriter(new FileOutputStream(
new File("persons.txt"),
true /* append = true */));