Here is an example of using the BrokenOutputStream class from the Apache Commons IO library in Java to simulate a broken output stream:

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import org.apache.commons.io.output.BrokenOutputStream;

public class BrokenOutputStreamExample {
    public static void main(String[] args) {
        // create a new ByteArrayOutputStream
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        
        // create a new BrokenOutputStream
        BrokenOutputStream brokenOut = new BrokenOutputStream(out);
        
        // mark the stream as broken
        brokenOut.setBroken(true);
        
        try {
            // write some data to the stream
            brokenOut.write("This is some text.".getBytes());
        } catch (IOException e) {
            System.out.println("Error writing to stream: " + e.getMessage());
        }
    }
}

In this example, a new BrokenOutputStream object is created by passing a ByteArrayOutputStream object as an argument. The setBroken(true) method is used to mark the stream as broken, and when the write() method is called to write data to the stream, an IOException is thrown with the message "Stream is broken".

You can use the BrokenOutputStream to simulate a broken output stream in your testing or development environment, this way you can test how your application behaves when the stream is broken.

You can also use the setBroken(boolean) method to mark the stream as broken or unbroken, and the isBroken() method to check if the stream is broken or not.