javapromote的简单介绍

本篇文章给大家谈谈javapromote，以及对应的知识点，希望对各位有所帮助，不要忘了收藏本站喔。

本文目录一览：

• 1、计算机项目描述中译英
• 2、请编写一个程序，以演示抽象类和接口。
• 3、请问一下:JAVA中Double d = 1; 为什麼会compile fail??
• 4、用Java做一个聊天程序，在任务栏处提示效果怎么做？

计算机项目描述中译英

1. Performance of the system is divided into the middle layer and data services layer, the image layer is realized through the JSP, and the use of the expression of the el and the label, only to simplify the performance of the difficulty and responsibility of the code, data-lasting use Hibernate ,业务逻辑层adopted the common java object.

2. The system is mainly to complete the telecommunications billing business, IP network management and site visits statistical operations. Telecommunication services including IP network users and non-IP network users (fixed, mobile) at the Internet long, green traffic, such as the number of clicks. IP network management of all IP equipment, all background applications, and Unix workstations. Flexibility to add, edit fee pricing information and promotional information, by, delete, search, information to users and administrators, users, generating monthly bill, monthly, respectively, generating statistics and accounting information in the Accounts Statistics and information through the Internet allows users to query their own since the current or historical billing.

3. MVC model by design, according to J2EE layered design, performance is divided into layers, the middle layer (业务逻辑层) and data services layer, the middle layer will be strictly divided into业务逻辑层, DAO layer and data layer, and so durable. MVC-lasting ban the controller of the visit, or even not participate in the realization of business logic. Web (that is, the MVC model, "C") of using Struts,业务逻辑层responsible for the control of the interaction with the performance, call业务逻辑层and business data back to the performance of the Organization for performance. Service Layer (is业务逻辑层) for the realization of business logic.业务逻辑层and DAO layer-based, through the positive component of the DAO mode packaging, complete system required by the business logic. DAO layer, in charge of interactive objects and lasting words. The layer of the package by the data, delete, search, to such an operation, PO persistent object. Through entities relations mapping tool will relational database mapping data into the target, it is a convenient way to realize the object-oriented database operation, the system used as Hibernate ORM framework. Spring's role throughout the entire middle layer, the Web layer, Service layer, DAO layer and PO seamless integration of its data services to be used to store data.

请编写一个程序，以演示抽象类和接口。

Java源代码：

//演示类

public class Demo {

public static void main(String[] args) {

Employee emp; //抽象类对象

IPromotable prog; //接口对象

emp = new Intern("张三其", 3000, 3);

emp.print();

System.out.println();

prog = new Programmer("张三其", 5400, 30);

((Employee)prog).print();

prog.promote();

System.out.println();

prog = new Manager("张三其", 8000, "李师煊");

((Employee)prog).print();

prog.promote();

System.out.println();

}

}

//抽象雇员基类

abstract class Employee{

protected String name; //姓名

protected int salary; //年薪

abstract void print();

}

//晋升接口

interface IPromotable{

void promote();

}

//优秀员工接口

interface IGoodEmployee{

void promote();

}

//实习生类

class Intern extends Employee{

protected int periodOfInternship; //实习期

public Intern(String name, int salary, int periodOfInternship){

this.name = name;

this.salary = salary;

this.periodOfInternship = periodOfInternship;

}

@Override

public void print() {

System.out.println("实习生信息：");

System.out.println("姓名：" + this.name);

System.out.println("年薪：" + this.salary);

System.out.println("实习期(月)：" + this.periodOfInternship);

}

}

//程序员类

class Programmer extends Employee implements IPromotable{

protected int averageOT; //平均加班时间

public Programmer(String name, int salary, int averageOT){

this.name = name;

this.salary = salary;

this.averageOT = averageOT;

}

@Override

public void promote() {

System.out.println("您当前的职务是程序员，即将晋升为经理！");

}

@Override

public void print() {

System.out.println("程序员信息：");

System.out.println("姓名：" + this.name);

System.out.println("年薪：" + this.salary);

System.out.println("平均加班时间(小时/月)：" + this.averageOT);

}

}

//经理类

class Manager extends Employee implements IGoodEmployee, IPromotable{

protected String secretaryName; //助理姓名

public Manager(String name, int salary, String secretaryName){

this.name = name;

this.salary = salary;

this.secretaryName = secretaryName;

}

@Override

public void promote() {

System.out.println("您已经是经理了，不能马上获得晋升！");

}

@Override

public void print() {

System.out.println("经理信息：");

System.out.println("姓名：" + this.name);

System.out.println("年薪：" + this.salary);

System.out.println("助理姓名：" + this.secretaryName);

}

}

请问一下:JAVA中Double d = 1; 为什麼会compile fail??

在java中，int的确是可以转为double，而Double d=(double)2;这样也是没问题。。

Double里面的装箱，只会装进double类型的。。但是，不会装入int类型的。。所以你这里就出错了。。

既然你自己都知道在java中，1的类型是int，那么你还要问什么？java目前的版本还没有提供二次转换，这没什么好奇怪的，毕竟没什么必要

用Java做一个聊天程序，在任务栏处提示效果怎么做？

java 可以实现将程序最小化到托盘的吧.....

甚至还可以设定最小化到托盘的图标,这样的话,当有新消息到达时,你可以把它的图标设置成无色的另一图片(或者只将其最小化,而不设置其图标),然后再设置成原来的图片,如此反复,就实现了闪烁的功能.........

不过似乎先要判断当前操作系统是否支持系统托盘..........下面这个程序实现了系统托盘,但是似乎在我的电脑上没实现出来,难道操作系统不支持?

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

public class SystemTrayTest extends JFrame implements ActionListener

{

//创建菜单、菜单项数组、消息类型

PopupMenu popup=new PopupMenu();

Menu menu=new Menu("消息类型");

MenuItem[] itemArray ={new MenuItem("信息消息"),new MenuItem("常规消息"),

new MenuItem("警告消息"),new MenuItem("错误消息"),new MenuItem("退出程序")};

//定义系统托盘、托盘图标变量

SystemTray tray;

TrayIcon trayIcon;

//构造方法

public SystemTrayTest(){

//对菜单项添加监听并将菜单项添加到菜单中

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

if(i4){

itemArray[i].addActionListener(this);//为菜单项注册监听器

//将菜单项数组中前3个菜单项添加进"弹出消息"菜单中

menu.add(itemArray[i]);

}

itemArray[4].addActionListener(this);//添加监听

popup.add(menu);//将弹出消息菜单添加到菜单中

popup.add(itemArray[4]);//将退出菜单添加到菜单中

}

// 判断当前操作系统是否支持系统托盘

if (SystemTray.isSupported()) {

//获取系统托盘

tray = SystemTray.getSystemTray();

//加载图标

Image image = Toolkit.getDefaultToolkit().getImage("d:/trayIcon.jpg");

//创建托盘图标

trayIcon=new TrayIcon(image,"系统托盘测试",popup);

//托盘图标自动设置尺寸

trayIcon.setImageAutoSize(true);

try{//添加托盘图标到系统托盘中

tray.add(trayIcon);

}

catch(AWTException e){

e.printStackTrace();

}

//为托盘图标注册监听器

trayIcon.addActionListener(this);

}

//设置窗体关闭按扭所执行的动作

this.addWindowListener(

new WindowAdapter(){

public void windowClosing(WindowEvent e){

SystemTrayTest.this.hide();//隐藏窗体

}

});

//设置窗体属性

this.setTitle("系统托盘测试");

this.setBounds(200,200,150,100);

this.setVisible(true);

}

//重写actionPerformed方法

public void actionPerformed(ActionEvent e){

if(e.getSource()==itemArray[0])

{//点击信息消息菜单项执行的动作

trayIcon.displayMessage("信息","程序最小化，仍在运行",TrayIcon.MessageType.INFO);

}else if(e.getSource()==itemArray[1])

{//点击信息消息菜单项执行的动作

trayIcon.displayMessage("常规信息","现在一切正常",TrayIcon.MessageType.NONE);

}else if(e.getSource()==itemArray[2])

{//单击警告消息菜单项执行的动作

trayIcon.displayMessage("警告信息","有不明来源的攻击",TrayIcon.MessageType.WARNING);

}else if(e.getSource()==itemArray[3])

{//点击错误消息菜单项执行的动作

trayIcon.displayMessage("错误信息","程序发生严重错误",TrayIcon.MessageType.ERROR);

}else if(e.getSource()==itemArray[4])

{//点击退出程序菜单项执行的动作

System.exit(0);

}else if(e.getSource()==trayIcon)

{//双击托盘图标执行的代码

this.show(true);

}

}

//主方法

public static void main(String args[])

{//创建SystemTrayTest窗体对象

new SystemTrayTest();

}

}

javapromote的介绍就聊到这里吧，感谢你花时间阅读本站内容，更多关于、javapromote的信息别忘了在本站进行查找喔。