我一直在尝试将数组写入文件。我知道如何将整数或字符串写入文件,但是要带一个数组会使我感到困惑。我现在正在使用这个:
public static void write (String file, int[]x) throws IOException{
BufferedWriter outputWriter = null;
outputWriter = new BufferedWriter(new FileWriter(filename));
outputWriter.write("hi");// Here I know i cant just write x[0] or anything. Do i need
//to loop in order to write the array?
outputWriter.newLine();
outputWriter.flush();
outputWriter.close();
}
最佳答案
就像其他人说的那样,您可以循环遍历数组并逐个打印出元素。为了使输出显示为数字而不是您看到的“字母和符号”,您需要将每个元素转换为字符串。因此,您的代码将如下所示:
public static void write (String filename, int[]x) throws IOException{
BufferedWriter outputWriter = null;
outputWriter = new BufferedWriter(new FileWriter(filename));
for (int i = 0; i < x.length; i++) {
// Maybe:
outputWriter.write(x[i]+"");
// Or:
outputWriter.write(Integer.toString(x[i]);
outputWriter.newLine();
}
outputWriter.flush();
outputWriter.close();
}
如果只想打印出
[1, 2, 3, ....]
之类的数组,则可以使用此衬纸替换循环:outputWriter.write(Arrays.toString(x));