DESKTOP-EA11HIB_20200904-蒋宇飞

一、问题

   public static void main(String[] args) {
        try {
            int a = 100 / 0 ;//java.lang.ArithmeticException
            System.out.println( a );        
        } catch ( NullPointerException npe ) {
            System.out.println( "NullPointerException : " + npe );
        } catch ( ArithmeticException ae ) {
            System.out.println( "ArithmeticException : " + ae );
        } catch ( Exception e ) {
            System.out.println( "Exception : " + e );
        } catch ( Throwable t ) {
            System.out.println( "Throwable : " + t );
        } 
    }

Throwable 类是 Exception 类的父类,Exception 类是 ArithmeticException 类和 NullPointerException 类的父类,子类在前,父类在后程序可以编译,但父类在前,子类在后却显示受检查异常。

二、感想

坚持。

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