java exception
http://topic.csdn.net/u/20090108/22/dc7e85d9-8196-47be-a66c-83f7a6f86865.html?57688550用户输入10个数(整型),否则抛出自定义异常，并且将此数置0，
如果总数>1000，则抛出自定义异常，并且将总和写入磁盘文件（在自定义异常中做）。
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ExceptionTest .java
package com.javaeye.lindows.exception; import java.io.DataInputStream;import java.io.DataOutputStream;import java.io.FileOutputStream;import java.io.IOException;public class ExceptionTest { private static final int MAX = 1000; public static void main(String[] args) throws OutOf1000Excetion { int[] inputData = getInputData(); int sum = 0; for(int i = 0; i < inputData.length; i++) sum += inputData; if(sum > 1000) throw new OutOf1000Excetion(sum, "Out of 1000"); System.out.println("Sum=" + sum); } private static int[] getInputData() { int size = 10; int ret[] = new int; DataInputStream dis = new DataInputStream(System.in); String temp = null; for (int i = 0; i < 10; i++) { System.out.println("please enter integer[" + i + 1 + "]:"); try { temp = dis.readLine(); if (!temp.matches("[+-]?\\d+")) { temp = "0"; throw new NotIntegerException("Not Integer."); } } catch (Exception e) { } ret = Integer.parseInt(temp); } return ret; }}class NotIntegerException extends Exception { public NotIntegerException() { super(); } public NotIntegerException(String message) { super(message); }}class OutOf1000Excetion extends Exception { public OutOf1000Excetion(int sum, String message) { super(message); writeToDisk(sum); } private void writeToDisk(int sum) { DataOutputStream dos = null; try { dos = new DataOutputStream(new FileOutputStream("D:\\input.txt")); dos.write(String.valueOf(sum).getBytes()); dos.flush(); dos.close(); } catch (Exception e) { e.printStackTrace(); if(dos!=null) try { dos.close(); } catch (IOException e1) { e1.printStackTrace(); } return; } }}
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