Java convert a stack trace to a string

/**
 * @author lautturi.com 
 * Java example: print stack trace of exception as string in java
 */

import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.*;

public class Lautturi {

	public static void main(String[] args) {

		try {
			int a = 20/0;
		}
		catch (Exception e) {
			StringWriter sw = new StringWriter();
			e.printStackTrace(new PrintWriter(sw));
			String exceptionAsString = sw.toString();
			
			System.out.println(e);
			System.out.println(e.toString());
			System.out.println(exceptionAsString);
		}
		
	}
}

output:

java.lang.ArithmeticException: / by zero

java.lang.ArithmeticException: / by zero

java.lang.ArithmeticException: / by zero
	at hello.Lautturi.main(Lautturi.java:72)