package com.itranswarp.world;

/**

 * 从BaseException派生自定义异常

 * 

 * @author hadoop

 * 

 */

public class CustomExceptionExample {

public static void main(String[] args) {

try {

String s1 = login("admin", "password");

System.out.println("s1:" + s1);

String s2 = login("admin", "pass");

System.out.println("s2:" + s2);

String s3 = login("adm", "password");

System.out.println("s3:" + s3);

} catch (LoginFailException e) {

e.printStackTrace();

} catch (UserNotFoundException e) {

e.printStackTrace();

} finally {

System.out.println("测试结束！");

}

}

static String login(String username, String password) {

if ("admin".equals(username)) {

if ("password".equals(password)) {

return "登陆成功";

} else {

throw new LoginFailException("请输入正确的密码!");

}

} else {

throw new UserNotFoundException("该用户不存在！");

}

}

}

class BaseException extends RuntimeException {

public BaseException() {

super();

}

public BaseException(String message, Throwable cause) {

super(message, cause);

}

public BaseException(String message) {

super(message);

}

public BaseException(Throwable cause) {

super(cause);

}

}

class LoginFailException extends BaseException {

public LoginFailException() {

super();

}

public LoginFailException(String message, Throwable cause) {

super(message, cause);

}

public LoginFailException(String message) {

super(message);

}

public LoginFailException(Throwable cause) {

super(cause);

}

}

class UserNotFoundException extends BaseException {

public UserNotFoundException() {

super();

}

public UserNotFoundException(String message, Throwable cause) {

super(message, cause);

}

public UserNotFoundException(String message) {

super(message);

}

public UserNotFoundException(Throwable cause) {

super(cause);

}

}