74 lines
1.9 KiB
Java
74 lines
1.9 KiB
Java
package chapter4.demo49;
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// 自定义异常类
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class UserException extends Exception {
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public UserException(String message) {
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super(message);
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}
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}
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// 用户操作接口
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interface UserOperation {
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void changePassword(String newPassword) throws UserException;
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void showInfo();
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}
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// 抽象用户类
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abstract class AbstractUser implements UserOperation {
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protected String username; // 用户名
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protected String password; // 密码
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protected String userType; // 用户类型
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// 构造方法
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public AbstractUser(String username, String password) {
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this.username = username;
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this.password = password;
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}
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public String getUsername() {
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return username;
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}
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// 检查密码是否正确
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public boolean checkPassword(String password) {
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return this.password.equals(password);
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}
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@Override
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public void showInfo() {
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System.out.println("用户名：" + username + "，用户类型：" + userType);
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}
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}
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// 普通用户类
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class NormalUser extends AbstractUser {
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public NormalUser(String username, String password) {
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super(username, password);
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this.userType = "普通用户";
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}
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@Override
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public void changePassword(String newPassword) throws UserException {
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if (newPassword.length() < 6) {
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throw new UserException("密码长度不能小于6位");
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}
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this.password = newPassword;
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}
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}
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// 管理员类
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class AdminUser extends AbstractUser {
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public AdminUser(String username, String password) {
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super(username, password);
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this.userType = "管理员";
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}
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@Override
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public void changePassword(String newPassword) throws UserException {
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if (newPassword.length() < 8) {
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throw new UserException("管理员密码长度不能小于8位");
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}
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this.password = newPassword;
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}
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}
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