Exception classのgetMessage

getMessage()とprintStackTrace()の違い
ExecutorServiceを使用した場合に発生するExecutionExceptionのgetMessage()について

public class Outer {
    public static void main(String[] args) throws InterruptedException {
        SampleException se = new SampleException("xxxxxx");
        System.out.println(se.getMessage());
        method();
        Exception ex = new Exception("eeee");
        System.out.println(ex.getMessage());
        Exception ex2 = new ExecutionException(se);
        System.out.println(ex2.getMessage());
    }
    static void method() {
        SampleException se = new SampleException("yyyy");
        se.printStackTrace();
    }
}

ExecutionExceptionのgetMessage()は、クラス名が前につく

xxxxxx
com.mycompany.mavenproject1.SampleException: yyyy
	at com.mycompany.mavenproject1.Outer.method(Outer.java:37)
	at com.mycompany.mavenproject1.Outer.main(Outer.java:30)
eeee
com.mycompany.mavenproject1.SampleException: xxxxxx