I'm getting struggle creating a text file printChar.txt My output one the txt print only B. Please Help

Create a PrintChar class that implements Runnable. The constructor should accept a character and an integer as parameters. The run method should print the character the number of times indicated by the integer. Create an application named CharApp.java that instantiates two PrintChar objecs, one passed "A" and 200 and the other one passed "B" and 200. It then instantiates and starts two thread objects. Experiment with the resulting system, using different numerical parameters for PrintChar objects. Create a report (a text file printChar.txt) about the results of your experiments-explain how the multiple threads work in your program.

public class PrintChar implements Runnable {

private char c;

private int n;

public PrintChar(char c, int n) {

this.c = c; this.n = n;

}

@Override

public void run() {

try {

PrintStream out = new PrintStream(new FileOutputStream("output.txt"));

for(int i = 0; i < n; i++) {

//System.out.print(c + " ");

out.println(c + " ");

//System.setOut(out);

}

out.flush();

out.close();

} catch(FileNotFoundException e){

System.out.println("Error opening the file in createTextWrite");

System.exit(0); } }

}

public class CharApp extends Thread{

public static void main(String[] args) throws InterruptedException, Exception{

PrintChar A = new PrintChar('A', 5);

PrintChar B = new PrintChar('B', 5);

Thread threadA = new Thread(A);

Thread threadB = new Thread(B);

sleep(10);

threadA.start();

threadB.start(); } }