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浅拷贝与深拷贝
首先来个简单的例子import java.util.Date;public class Employee { private Date hireDay; private String name; public String getName() { return name; } public void setName(String name) {...
分类:其他好文   时间:2015-04-18 08:48:05    阅读次数:140
LeetCode - Employees Earning More Than Their Managers
Description:The Employee table holds all employees including their managers. Every employee has an Id, and there is also a column for the manager Id.G...
分类:其他好文   时间:2015-04-17 01:09:23    阅读次数:210
LeetCode - Second Highest Salary
Description: Write a SQL query to get the second highest salary from the Employee table.+----+--------+| Id | Salary |+----+--------+| 1 | 100 ||...
分类:其他好文   时间:2015-04-17 00:56:49    阅读次数:154
Spring 雇员管理系统SSH 1
【配置Spring并测试】 引入Spring包,编写applicationContext.xml文件,该文件放在src目录下 建立domain包,编写雇员类Employee.java Employee.java中 public class Employee { private Integer id;...
分类:编程语言   时间:2015-04-15 11:15:00    阅读次数:347
巩固java(四)----super和super()
引言:         一个公司里有普通员工和经理,他们之间有很多共同点,但也有一些差异,比如薪水问题,普通员工只有普通工资,经理在完成绩效后有一定比例的奖金。这时我们可以定义两个类Employee和Manager,显然两个类之间存在明显的"is-a"关系---经理也是公司员工,而“is-a”关系是继承关系的特征,所以Employee和Manager之间存在继承关系。 正文:    ...
分类:编程语言   时间:2015-04-14 23:22:44    阅读次数:200
LeetCode Department Top Three Salaries
The Employee table holds all employees. Every employee has an Id, and there is also a column for the department Id. +----+-------+--------+--------------+ | Id | Name | Salary | DepartmentId | +--...
分类:其他好文   时间:2015-04-13 23:04:15    阅读次数:179
[LeetCode]Employees Earning More Than Their Managers,解题报告
目录目录 题目 思路 AC SQL题目The Employee table holds all employees including their managers. Every employee has an Id, and there is also a column for the manager Id. Id Name Salary ManagerId 1 Joe...
分类:其他好文   时间:2015-04-13 20:58:33    阅读次数:130
LeetCode Nth Highest Salary
Write a SQL query to get the nth highest salary from the Employee table. +----+--------+ | Id | Salary | +----+--------+ | 1 | 100 | | 2 | 200 | | 3 | 300 | +----+--------+ For exampl...
分类:其他好文   时间:2015-04-13 09:35:04    阅读次数:105
Postgresql 自增语句
如果只是简单地从1开始,递增值为1,可以这样写,serail是一种特殊的类型: 往Employee中添加值及其结果: 如果想设置更加详细的项,比如起始、递增值、最大值、最小值,可以定义一个sequence。 在sequence中,如果是no minvalue、no maxvalue表示最小最大值为-1,注意最小值不能大于最大值.。 然后改变表格的列: 往E...
分类:数据库   时间:2015-04-12 19:24:09    阅读次数:202
java代码
io的使用 1 package com.tan.io; 2 3 import java.io.*; 4 import java.util.*; 5 6 class Employee{ 7 private String name; 8 private double salary; ...
分类:编程语言   时间:2015-04-12 19:09:13    阅读次数:182
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