以下实例演示了使用 System 类的 System.err.println() 来展示异常的处理方法:
class ExceptionDemo { public static void main(String[] args) { try { throw new Exception("My Exception"); } catch (Exception e) { System.err.println("Caught Exception"); System.err.println("getMessage():" + e.getMessage()); System.err.println("getLocalizedMessage():" + e.getLocalizedMessage()); System.err.println("toString():" + e); System.err.println("printStackTrace():"); e.printStackTrace(); } } }
以上代码运行输出结果为:
Caught Exception getMessage():My Exception getLocalizedMessage():My Exception toString():java.lang.Exception: My Exception printStackTrace(): java.lang.Exception: My Exception at ExceptionDemo.main(ExceptionDemo.java:5)