What is the difference between the method writeChar and writeShort in java.io.DataOutputStream class?

I am currently learning basic I/O of java. Please see the following code:

import java.io.DataOutputStream;
import java.io.IOException;
public class TestIO {

public static void main(String[] args) {

    try(DataOutputStream out=new 
    DataOutputStream(new FileOutputStream("e:\\ccc.txt"))){

        out.writeShort(67);
        out.writeChar(67);

    }catch(IOException ex){
        ex.printStackTrace();
    }

}

}

In the output ccc.txt file, I get the following output:

 C C

I understand that both methods write two bytes to the outputstream and the binary string of 67 is 1000011 which represents the capital letter C in ASCII or anyother code. The space before C is the byte 0000 0000 read by the methods.

However, what is the difference between the two methods if they both simply write two bytes to the outputstream?I was expecting that writeShort can write two bytes to the outputstream and then transfer it back to integer. In other words, how can I directly write the integer 67 to a file,not converting it to a character?

Let me ask this question in a different way, under what circumstance can these two methods generate different results? I need a real-world example. Thanks!