1.建立exception包,编写TestException.java程序，主方法中有以下代码，确定其中可能出现的异常，进行捕获处理。

package d0923;

public class TestException {

public static void main(String[] args) {

	for(int i=0;i<4;i++){
		int  k;
		switch(i){
			case 0:

try{

int zero=0;

k=911/zero;

break;

}

catch(Exception e)

{

System.out.println(e.getMessage());

e.printStackTrace();

}

			case 1:

try{

int b[]=null;

k = b[0];

break;

}

catch(Exception e)

{

System.out.println(e.getMessage());

e.printStackTrace();

}

case 2:

try{

int c[]=new int[2];

	k=c[9];
	break;

}

catch(Exception e)

{

System.out.println(e.getMessage());

e.printStackTrace();

}

case 3:

try{

char ch="abc".charAt(99);

	break;

}

catch(Exception e)

{

System.out.println(e.getMessage());

e.printStackTrace();

}

}

}

}

}

//运行结果

/ by zerojava.lang.ArithmeticException: / by zero

at d0923.TestException.main(TestException.java:13)

java.lang.NullPointerException

at d0923.TestException.main(TestException.java:25)

null

9

java.lang.ArrayIndexOutOfBoundsException: 9

at d0923.TestException.main(TestException.java:37)

String index out of range: 99

java.lang.StringIndexOutOfBoundsException: String index out of range: 99

at java.lang.String.charAt(String.java:658)

at d0923.TestException.main(TestException.java:47)

null

java.lang.NullPointerException

at d0923.TestException.main(TestException.java:25)

9

java.lang.ArrayIndexOutOfBoundsException: 9

at d0923.TestException.main(TestException.java:37)

String index out of range: 99

java.lang.StringIndexOutOfBoundsException: String index out of range: 99

at java.lang.String.charAt(String.java:658)

at d0923.TestException.main(TestException.java:47)

9

java.lang.ArrayIndexOutOfBoundsException: 9

at d0923.TestException.main(TestException.java:37)

String index out of range: 99

java.lang.StringIndexOutOfBoundsException: String index out of range: 99

at java.lang.String.charAt(String.java:658)

at d0923.TestException.main(TestException.java:47)

String index out of range: 99

java.lang.StringIndexOutOfBoundsException: String index out of range: 99

at java.lang.String.charAt(String.java:658)

at d0923.TestException.main(TestException.java:47)