public class ExceptionTest {
	public static void main(String[] args) {
		//常見的RuntimeException
		//1.ArithmeticException()運算異常
		//2.ClassCastException()類的轉換異常
		//3.NullPointerException()空指標異常
		//4.IndexOutOfBoundsException()陣列指標越界異常
		try{

			int i=10;
			int j = 0;
			System.out.println(i/j);
		}catch(ArithmeticException e){
			System.out.println("除數不能為0");
		}

		FileReader fr = null;
		try {
			fr = new FileReader("f:/test/dd/tt.txt");
		} catch (FileNotFoundException e) {//這個是IO異常，不是RuntimeException異常
			System.out.println("找不到檔案");
			//			e.printStackTrace();
		}
		finally{
			try {
				fr.close();
			}catch(IOException i){
			}
			catch (NullPointerException n) {
				System.out.println("空指標異常");
			}
		}
		try{
			int[] aa = {1,2,3};
			System.out.println(aa[3]);
		}catch(IndexOutOfBoundsException e){
			System.out.println("陣列越界！");
		}

		Map<String,String> map=new HashMap<String, String>();
		try{
			TreeMap<String ,String> map2=(TreeMap)map;
		}catch(ClassCastException c){
			System.out.println("類轉換異常");
		}
		
		//自定義異常
		try{
			Person p = new Person(-1);

		}catch(MyException m){
			m.printStackTrace();
		}
	}
}