Question

请各位高手指教;JAVA编程 题目：1、利用文件输出流创建一个文件file1.txt，写入字符“文件已被成功创建！

要求：利用文件输出流创建一个文件file1.txt，写入字符“文件已被成功创建！”，然后用记事本打开该文件，看一下是否正确完成。

Answer 1

写给你
public class Test {
public static void main(String[] args) throws IOException {
String fileName = "file1.txt";
FileOutputStream out = new FileOutputStream(fileName);
String str = "文件已创建";
out.write(str.getBytes());
out.close();
Runtime r = Runtime.getRuntime();
r.exec("cmd /c start " + fileName);
}
}

Answer 2

BufferedWriter writer;
try {
writer = new BufferedWriter(new FileWriter("file1.txt"));
writer.write("文件已被成功创建!");
writer.flush();
} catch (IOException e1) {
e1.printStackTrace();
}

Answer 3

FileOutputStream out=new FileOutputStream("file1.txt");
String str="文件已创建";
out.write(str.getBytes());