package cn.com.exception;

import java.io.FileNotFoundException;
import java.io.IOException;
/**
 * 把所有异常全部抛出...不做处理... 这样既防止吞掉异常(try..catch)又不用去声明抛出异常... 
 * 把所有异常抛给上层调用者去处理.
 * @author GuoBaoqiang
 * 2014年7月24日
 */
public class Test {
	void throwRuntimeException(int type) {
		try {
			switch (type) {
			case 0:
				throw new FileNotFoundException();
			case 1:
				throw new IOException();
			case 2:
				throw new RuntimeException("where am i ");
			default:
				return;
			}
		} catch (Exception e) {
			throw new RuntimeException(e);
		}
	}
	
	public void pack_exception() {
		try {
			for (int i = 0; i < 4; i++) {
				throwRuntimeException(i);
			}
			// .....
		} catch (Exception re) {
			try {
				throw re.getCause();
			} catch (FileNotFoundException e) {
				System.out.println("FileNotFoundException:" + e);
			} catch (IOException e) {
				System.out.println("IOException:" + e);
			} catch (Throwable e) {
				System.out.println("Throwable:" + e);
			}
		}
	}
}