java中继承及异常处理!

实现图解:



下面是一个关于检验年龄是否合格的实例.用到继承及异常处理的相知识!

1~~~~~~~~~~~~~~~~~~~~~~

package age;

class AgreeException extends Exception {

int age;

AgreeException(int age, String s) {

super(s);

this.age = age;

}

AgreeException() {

super();

}

}

2~~~~~~~~~~~~~~~~~~~~~

class IllegalAgeException extends AgreeException {

IllegalAgeException(int age, String s) {

super(age, s);

}

IllegalAgeException() {

super();

}

}

3~~~~~~~~~~~~~~~~~~~~~~~

class OutlimitException extends AgreeException

{

int agelimit;

OutlimitException(int age,int agelimit,String s)

{

super(age,s);

this.agelimit=agelimit;

}

OutlimitException(){

super();

}

}

4~~~~~~~~~~~~~~~~~~~~~~~~

class NegativAagEexception extends IllegalAgeException {

NegativAagEexception(int age) {

super(age, "年龄不能为负数! ");

}

NegativAagEexception() {

super();

}

}

5~~~~~~~~~~~~~~~~~~~~~~~~

class OldException extends OutlimitException{

OldException(int age,int agelimit)

{

super(age,agelimit,"大于年龄限制");

}

OldException()

{

super();

}

}

6~~~~~~~~~~~~~~~~~~~~~~~

package age;

class YoungException extends OutlimitException{

YoungException(int age,int agelimit)

{

super(age,agelimit,"小于年龄限制");

}

YoungException()

{

super();

}

}

7~~~~~~~~~~~~~~~~~~~~~~~

public class Exceptiondemo {

static int lowlimit;

static int highlimit;

static void check(int age) throws NegativAagEexception, OutlimitException {

if (age < 0) {

throw new NegativAagEexception(age);

} else if (age < lowlimit) {

throw new YoungException(age, lowlimit);

} else if (age > highlimit) {

throw new OldException(age, highlimit);

}

System.out.println(age + " 年龄符合要求!");

}

public static void main(String[] args) {

int[] age = { -11, 16, 70, 12 };

highlimit = 60;

lowlimit = 15;

System.out.println("开始检测 :" + '/r' + age[0]);

for (int i = 0; i < age.length; i++) {

try {

check(age[i]);

} catch (NegativAagEexception e) {

System.out.println(e);

// e.printStackTrace();

} catch (OutlimitException e) {

System.out.println(e);

// e.printStackTrace();

} finally {

if (i < age.length - 1) {

System.out.println("待检测的年龄" + age[i + 1]+'/r');

}

}

}

}

}