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说明：  全书分四个部分：基础知识、函数式数据处理、高效Java 8 编程和超越Java 8。(The book is divided into four parts: basic knowledge, functional data processing, efficient Java 8 programming and beyond Java 8.)

修改实验7中定义的Rectangle类，使之拥有两个构造方法。其中一个是默认的，它使两点的坐标都为（0，0） 另一个带有4个参数，求出左上角和右下角点坐标为（2.1，3.2）、（5.2，6.3）的矩形的周长及面积，再利用带参数的构造方法创建Rectangle对象，求出左上角和右下角点坐标为（1，2）、（6.8，10.5）的矩形的周长及面积.(Modify the definition of experiment 7 Rectangle class, so that it has two constructors. One is the default, it makes two points of the coordinate of (0,0) the other with four parameters, find the upper left and lower right corner coordinates (2.1,3.2), (5.2,6.3) and perimeter and area of ​ ​ a rectangle, and then use a parameterized constructor method to create a Rectangle object, find the upper left and lower right corner coordinates (1,2), (6.8,10.5) rectangle of perimeter and area.)

实现扑克牌，一副牌中抽去大小王剩下52张（如果初练也可只用1～10这40张牌)，任意抽取4张牌（称牌组)，用加、减、乘、除（可加括号)把牌面上的数算成24。每张牌必须用一次且只能用一次，如抽出的牌是3、8、8、9，那么算式为（9-8)×8×3或3×8+（9-8)或（9- 8÷8)×3等。(In order to realize playing cards, 52 cards are removed from a deck (only 40 cards can be used for the first practice). Four cards are randomly selected (called card groups). The number on the deck is calculated as 24 by adding, subtracting, multiplying and dividing (brackets can be added). Each card must be used once and only once. If the drawn card is 3, 8, 8, 9, the formula is (9-8)*8*3 or 3*8+ (9-8) or (9-8 8)*3)

Returns the enum for matching the provided qualifier value.

说明：  这是关于遗传拼接算法，nesting，而且可以设置迭代次数(nesting This is about genetic splicing algorithm, nesting, and the number of iterations can be set.)

buffer Arg Names Source Code for Andriod.

miniCAD-java GUI实现的小型CAD软件，界面其实模仿了windows画图的风格，实现了画线、画圆、画矩形、画文字载入图片，并能改变图形的颜色和大小。(In this project, you should use Java GUI to implement a simple drawing board. To get full marks, you should implement to: 1.draw line, circle, rectangle, text 2.change the color of a target 3.change the position of a targets 4.change the size of a targets 5.save images as files and load a image file All processes of changes should be visible.)

面试java基础,经常出现的，资料的详细功能为面试java基础,包含经常出现的，(Java interview-based, often, the information detailed interview java based functions, including recurrent,)

Java Universidad model view controller

简单的javaee写的聊天室功能，内容很简单。很适合初学者。大家可以看看。(Javaee write simple chat room function, which is very simple. It is suitable for beginners. We can look at.)