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)