catch可以同時捕獲多個異常，示例如下：

    public void writeList() {
        // The FileWriter constructor throws IOException, which must be caught.
        PrintWriter out = null;
        try {
            System.out.println("Entered try statement");
            out = new PrintWriter(new FileWriter("OutFile.txt"));
            for
 
 (int i = 0; i < SIZE; i++) {
                // The get(int) method throws IndexOutOfBoundsException, which must be caught.
                out.println("Value at: " + i + " = " + list.get(i));
            }
            out.close();
        } catch (IOException  | IndexOutOfBoundsException e) {
        	//ERROR e=new IOException("new io exception");
 

            e.printStackTrace();
        }

    }

但要注意的是如果是捕獲多異常的話，異常變數預設就會變成final的了，不能再進行賦值。

單個異常不是final的

        catch (IOException  e) {
            e=new IOException("new io exception");
            e.printStackTrace();
        }