JAVA异常

JAVA异常

AccountNotFoundException类

package com.blueleson.hello;
?
public class AccountNotFoundException extends Exception {
?
?? public AccountNotFoundException(String message) {
?????? super(message);
?? }
?
?? @Override
?? public String getMessage() {
?????? return "账号未找到";
?? }
}

login类

package com.blueleson.hello;?public class User {??? public void login(String account,String password)??????????? throws AccountNotFoundException {??????? boolean accountExisted = false; // 默认帐号不存在??????? String otherPassword;??????? // 此处可插入查询帐号的代码??????? if (accountExisted) { // 如果帐号不存在，抛出异常，程序中断??????????? throw new AccountNotFoundException(account);?????? }?? }??? public static void main(String[] args) {??????? User user = new User();??????? try {??????????? user.login("account","password");?????? } catch (AccountNotFoundException e) {??????????? //插入处理帐号不存在的代码??????????? System.out.println(e.getMessage());??????????? System.exit(-1);?????? }??????? //插入登陆成功的代码??????? System.out.println("登陆成功！");?? }?}