用java定义一个用户类要处理的信息有用户ID、用户密码、email地址。属性私有化对外提供公开的set和get方法提供一个showInfo方法通过这个方法展示用户信息。编写测试程序创建对象调用showInfo方法。

public class User {
    private int userID;
    private String password;
    private String emailAddress;

    public int getUserID() {
        return userID;
    }

    public void setUserID(int userID) {
        this.userID = userID;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getEmailAddress() {
        return emailAddress;
    }

    public void setEmailAddress(String emailAddress) {
        this.emailAddress = emailAddress;
    }

    public void showInfo() {
        System.out.println("User ID: " + userID);
        System.out.println("Password: " + password);
        System.out.println("Email Address: " + emailAddress);
    }

    public static void main(String[] args) {
        User user = new User();
        user.setUserID(123);
        user.setPassword("password123");
        user.setEmailAddress("example@example.com");

        user.showInfo();
    }
}
``