How to write an integer to a text file?

Question

Java

I am programming in Java. I cannot write the value of a variable of type Int to a text file. I used the DataOutputStream class in which I nested the FileOutputStream

DataOutputStream writer = new DataOutputStream(new FileOutputStream("D:\\Eclipse\\workspace\\MyExperimentalProject\\files\\output.txt"));

then output the value of the variable to a file writer.writeInt(a);
As a result, the file still turns out to be empty! help me please

Answer 1

Read what the DataOutputStream.writeInt() method does:
An integer can be written to a file like this:

try (FileWriter fileWriter = new FileWriter("output.txt")) {
    fileWriter.write(String.valueOf(5));
    fileWriter.flush();
}