java语言程序设计 进阶篇 原书第八版 课件 PPT(第三十七章)
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java语言程序设计 进阶篇 原书第八版 课件 PPT(第三十二章)
(1 ) A listen er ob ject is an in stan ce of a listen er in terface
listen er: Listen erC lass
Figure 15.3
Liang, Introduction to Java Programming, Eighth Edition, (c) 2011 Pearson Education, Inc. All rights reserved. 0132130807
Chapter 32 JavaBeans and Bean Events
Liang, Introduction to Java Programming, Eighth Edition, (c) 2011 Pearson Education, Inc. All rights reserved. 0132130807
NOTE: This chapter does not require that you use any builder tools. If you are interested to use JavaBeans in rapid Java application development using JBuilder or Sun ONE Studio, please refer to Supplement I, “Rapid Java Application Development Using JBuilder” or Supplement J, “Rapid Java Application Development Using Sun ONE Studio,” on the companion Website.
JavaBeans is a software component architecture that extends the power of the Java language by enabling wellformed objects to be manipulated visually at design time in a pure Java builder tool, such as JBuilder and NetBeans.
java语言程序设计 进阶篇 原书第八版 课件 PPT(第二十七章)
Liang, Introduction to Java Programming, Eighth Edition, (c) 2011 Pearson Education, Inc. All rights reserved. 0132130807
11
Representing Edges: Adjacency Matrix
1
Objectives
To model real-world problems using graphs and explain the Seven Bridges of Kö nigsberg problem (§27.1). To describe the graph terminologies: vertices, edges, simple graphs, weighted/unweighted graphs, and directed/undirected graphs (§27.2). To represent vertices and edges using lists, adjacent matrices, and adjacent lists (§27.3). To model graphs using the Graph interface, the AbstractGraph class, and the UnweightedGraph class (§27.4). To represent the traversal of a graph using the AbstractGraph.Tree class (§27.5). To design and implement depth-first search (§27.6). To design and implement breadth-first search (§27.7). To solve the nine-tail problem using breadth-first search (§27.8). To solve the Knight’s Tour problem by reducing it to a Hamiltonian path problem (§27.9).
java语言程序设计基础篇(第八版)课件_完整版
Java语言程序设计基础篇(第八版)课件_完整版第一章 Java语言概述Java是一种跨平台的编程语言，可在各种操作系统上运行。
它是一种面向对象的语言，具有高度的可移植性和可扩展性。
本章将介绍Java语言的特点、发展史和应用领域。
同时，还会介绍编写Java程序的开发环境和运行环境。
1.1 Java语言特点Java语言具有以下特点：•简单易学、易于使用•面向对象的设计思想•可移植性强•安全性高•高性能1.2 Java语言的发展史Java最早由Sun Microsystems于1995年发布。
自发布以来，Java已经逐渐成为全球范围内最流行的编程语言之一。
Java的发展历程经历了以下几个版本：•JDK 1.0（1996年）•JDK 1.1（1997年）•J2SE 1.2（1998年）•J2SE 1.3（2000年）•J2SE 1.4（2002年）•J2SE 5.0（2004年）•Java SE 6（2006年）•Java SE 7（2011年）•Java SE 8（2014年）1.3 Java语言的应用领域Java语言的应用范围很广，它可以用于开发各种应用程序，如：•企业级应用软件•移动应用程序•互联网应用程序•游戏开发•操作系统1.4 Java语言的开发环境Java语言的标准开发环境包括以下几个部分：•JDK（Java Development Kit，Java开发工具包）•Eclipse、NetBeans等集成开发环境1.5 Java语言的运行环境Java程序在运行时需要Java虚拟机（JVM）的支持，JVM可以在各种操作系统上运行。
因此，Java程序的可移植性非常强。
同时，JVM还提供了一些优化，可以使Java程序运行得更快。
第二章 Java编程基础2.1 程序结构Java程序的基本结构包括以下几个部分：•包声明•导入语句•类声明2.2 变量和常量Java中的变量有以下几种类型：•整型•浮点型•字符型•布尔型Java中的常量有以下几种类型：•整型常量•浮点型常量•字符型常量•布尔型常量2.3 运算符Java中的运算符包括以下几种类型：•算术运算符•关系运算符•逻辑运算符•位运算符•赋值运算符2.4 流程控制语句Java中的流程控制语句有以下几种类型：•if语句•switch语句•for语句•while语句•do…while语句第三章 Java面向对象编程基础3.1 面向对象编程概述面向对象编程是一种编程范式，它通过封装、继承和多态，使程序结构更清晰、更易于维护。
java语言程序设计 进阶篇 原书第八版 课件 PPT(第四十五章)
9
LR imbalance and LR rotation
LR Rotation: An LR imbalance occurs at a node A such that A has a balance factor -2 and a left child B with a balance factor +1. Assume B’s right child is C. This type of imbalance can be fixed by performing a double rotation at A (first a single left rotation at B and then a single right rotation at A).
The process for inserting or deleting an element in an AVL tree is the same as in a regular binary search tree. The difference is that you may have to rebalance the tree after an insertion or deletion operation. The balance factor of a node is the height of its right subtree minus the height of its left subtree. A node is said to be balanced if its balance factor is -1, 0, or 1. A node is said to be left-heavy if its balance factor is -1. A node is said to be right-heavy if its balance factor is +1.
java语言程序设计 进阶篇 原书第八版 课件 PPT(第四十三章)
Liang, Introduction to Java Programming, Eighth Edition, (c) 2011 Pearson Education, Inc. All rights reserved. 0132130807
8
Passing Parameters, cont.
Remote object type. Remote objects are passed differently from the local objects. When a client invokes a remote method with a parameter of some remote object type, the stub of the remote object is passed. The server receives the stub and manipulates the parameter through the stub.
Liang, Introduction to Java Programming, Eighth Edition, (c) 2011 Pearson Education, Inc. All rights reserved. 0132130807
4
The Differences between RMI and Traditional Client/Server Approach
Chapter 43 Remote Method Invocation
Liang, Introduction to Java Programming, Eighth Edition, (c) 2011 Pearson Education, Inc. All rights reserved. 0132130807
8
Passing Parameters, cont.
Remote object type. Remote objects are passed differently from the local objects. When a client invokes a remote method with a parameter of some remote object type, the stub of the remote object is passed. The server receives the stub and manipulates the parameter through the stub.
Liang, Introduction to Java Programming, Eighth Edition, (c) 2011 Pearson Education, Inc. All rights reserved. 0132130807
4
The Differences between RMI and Traditional Client/Server Approach
Chapter 43 Remote Method Invocation
Liang, Introduction to Java Programming, Eighth Edition, (c) 2011 Pearson Education, Inc. All rights reserved. 0132130807
java语言程序设计-基础篇--原书第八版--课件-PPT(第十二章)
Label
Text Check Radio
field Box
Button
Button
// Create a text field with text "Type Name Here" JTextField jtfName = new JTextField("Type Name Here");
// Create a check box with text bold JCheckBox jchkBold = new JCheckBox("Bold");
Applet
JApplet
Window
Frame Dialog
JFrame JDialog
JComponent
Swing Components in the javax.swing package
Lightweight
6
Container Classes
Object
Dimension Font
LayoutManager 1
JComponent
JPanel
Swing Components in the javax.swing package
Lightweight
8
JComponent
Swing GUI Components
JC heckBo xM e nuIte m
AbstractButton
JM enuIte m JButton JToggleButton
// Create a radio button with text red JRadioButton jrbRed = new JRadioButton("Red");
Text Check Radio
field Box
Button
Button
// Create a text field with text "Type Name Here" JTextField jtfName = new JTextField("Type Name Here");
// Create a check box with text bold JCheckBox jchkBold = new JCheckBox("Bold");
Applet
JApplet
Window
Frame Dialog
JFrame JDialog
JComponent
Swing Components in the javax.swing package
Lightweight
6
Container Classes
Object
Dimension Font
LayoutManager 1
JComponent
JPanel
Swing Components in the javax.swing package
Lightweight
8
JComponent
Swing GUI Components
JC heckBo xM e nuIte m
AbstractButton
JM enuIte m JButton JToggleButton
// Create a radio button with text red JRadioButton jrbRed = new JRadioButton("Red");
java语言程序设计 基础篇 原书第八版 课件 PPT(第十三章)
Liang, Introduction to Java Programming, Eighth Edition, (c) 2011 Pearson Education, Inc. All rights reserved. 0132130807
2
Objectives
Show runtime error
Quotient Run
Fix it using an if statement
QuotientWithIf Run
What if the runtime error occurs in a called method?
QuotientWithException Run
System errors are thrown by JVM and represented in the Error class. The Error class describes internal system errors. Such errors rarely occur. If one does, there is little you can do beyond notifying the user and trying to terminate the program gracefully.
Now you see the advantages of using exception handling. It enables a method to throw an exception to its caller. Without this capability, a method must handle the exception or terminate the program.
Java程序设计(高校系列教材课件).ppt
1.21
高等学校计算机应用人才培养系列教材
常量、关键字和标识符
常量
常量代表某一特定类型的具体值，常量有数字常量、 布尔常量、字符常量和字符串常量之分。
数字常量包括两种：整型常量和浮点型常量。常用的 整型常量都是十进制的。整型常量还有另外两种进制 ，八进制和十六进制。在Java中，八进制的值通过在 它的前面加一个前导0来表示，而通过前导的0x或0X来 表示一个十六进制的值。
） 分布式（Distributed）
高等学校计算机应用人才培养系列教材
1.7
Java和Internet
在使用Java时，用户将从Internet下载Java字节码并在自 己的计算机上运行。在Web网页中运行的Java程序叫做 Applet。要使用Applet，需要有支持Java的浏览器，它可 以解释字节码。
True或false
1.19
高等学校计算机应用人才培养系列教材
Java的数据类型和变量
变量
变量是Java的一个基本存储单元。在Java中，在使用变量之前需要先 声明变量。变量声明通常包括三部分：变量类型、变量名、初始值， 其中变量的初始值是可选的。
以下是几个各种变量声明的例子，有一些包括了变量的初始化。
char
boolean
所占用字节数 1 2 4 8 4 8
2
1
范围 -128到127 -32,768到32, 767 -2,147,483,648到2,147,483,647 -9,223,372,036,854,775,808到 -9,223,372,036,854,775,807 大约 ±3.4+38 大约 ±1.7E+308
1.10
高等学校计算机应用人才培养系列教材
《Java程序设计》电子课件
this.copper=c; // 给类成员变量z赋值
}
2024/10/20
宋波，李晋，李妙妍，张悦
String getModel( ) { return “金牌 = ”+gold+“ 银牌
=”+silver+“ 铜牌="+copper; }
2024/10/20
宋波，李晋，李妙妍，张悦
public static void main( String args[ ]) {
5. return color;
6. }
7. public float count(){ 8. int num; 9. if(num<0)
• 错误语句，因为局 部变量num还没有
10. return 0;
被赋值就使用
11. else
12. return price*num;
13. } 2024/10/20
2024/10/20
宋波，李晋，李妙妍，张悦
2. 类体
① 构造和初始化新对象的构造方法； ② 表示类及其对象状态的变量； ③ 实现类及其对象的方法； ④ 进行对象清除的finalize()方法。
2024/10/20
宋波，李晋，李妙妍，张悦
3.1.2 成员变量与局部变量
• 成员变量（类）：
➢ 在类体中声明的变量，且不属于任何 一个方法时。
Olympics2 o2=new Olympics2( );
System.out.println("Before changModel:"+o2.getModel());
o2.changeModel(100,100,100);
System.out.println("After changeModel:"+o2.getModel());
java语言程序设计 进阶篇 原书第八版 课件 PPT(第四十二章)
11
XML serialization/deserialization
Can you pass an argument of any type between a client and a Web service? No. SOAP only supports primitive types, wrapper types, arrays, String, Date, Time, List, and several other types. It also supports certain custom classes. An object that is sent to or from a server is serialized into XML. The process of serializing/deserialization objects, called XML serialization/deserialization, is performed automatically. For a custom class to be used with Web methods, the class must meet the following requirements:
C lien t W eb ser v ice p ro x y o b je ct S er v er
In ter n e t
W eb ser v ice
Liang, Introduction to Java Programming, Eighth Edition, (c) 2011 Pearson Education, Inc. All rights reserved. 0132130807
5
Creating Web Services Using NetBeans
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1
Objectives
To
Байду номын сангаас
understand the concept of database and database management systems (§37.2). To understand the relational data model: relational data structures, constraints, and languages (§37.2). To use SQL to create and drop tables, and to retrieve and modify data (§37.3). To learn how to load a driver, connect to a database, execute statements, and process result sets using JDBC (§37.4). To use prepared statements to execute precompiled SQL statements (§37.5). To use callable statements to execute stored SQL procedures and functions (§37.6). To explore database metadata using the DatabaseMetaData and ResultSetMetaData interfaces (§37.7).
Liang, Introduction to Java Programming, Eighth Edition, (c) 2011 Pearson Education, Inc. All rights reserved. 0132130807
5
Relational Structure
A relational database consists of a set of relations. A relation has two things in one: a schema and an instance of the schema. The schema defines the relation and an instance is the content of the relation at a given time. An instance of a relation is nothing more than a table with rows and named columns. For convenience with no confusion, we refer instances of relations as just relations or tables.
3
Database Application Systems
Application Users
Application Programs
Database Management System
…
Database Management System
…
…
database
Liang, Introduction to Java Programming, Eighth Edition, (c) 2011 Pearson Education, Inc. All rights reserved. 0132130807
4
Rational Database and Relational Data Model
Most of today’s database systems are relational database systems, based on the relational data model. A relational data model has three key A relational data model has three key components: structure, integrity and languages.
Liang, Introduction to Java Programming, Eighth Edition, (c) 2011 Pearson Education, Inc. All rights reserved. 0132130807
7
Student Table
Student Table ssn 444111110 444111111 444111112 444111113 444111114 444111115 444111116 444111117 444111118 444111119 444111120 firstName Jacob John George Frank Jean Josh Josh Joy Toni Patrick Rick mi lastName R K K E K R R P R R R Smith Stevenson Smith Jones Smith Woo Smith Kennedy Peterson Stoneman Carter phone 9129219434 9129219434 9129213454 9125919434 9129219434 7075989434 9129219434 9129229434 9129229434 9129229434 9125919434 birthDate street zipCode deptID BIOL BIOL CS BIOL CHEM CHEM BIOL CS MATH MATH BIOL 1985-04-09 99 Kingston Street 31435 null 100 Main Street 31411 31419 31411 31411 31411 31411 31412 31412 31411 1974-10-10 1200 Abercorn St. 1970-09-09 100 Main Street 1970-02-09 100 Main Street 1970-02-09 555 Franklin St. 1973-02-09 100 Main Street 1974-03-19 103 Bay Street 1964-04-29 103 Bay Street 1986-04-09 19 West Ford St.
Liang, Introduction to Java Programming, Eighth Edition, (c) 2011 Pearson Education, Inc. All rights reserved. 0132130807
Liang, Introduction to Java Programming, Eighth Edition, (c) 2011 Pearson Education, Inc. All rights reserved. 0132130807
2
What is a Database System?
Application Users
1969-04-29 101 Washington St. 31435
Liang, Introduction to Java Programming, Eighth Edition, (c) 2011 Pearson Education, Inc. All rights reserved. 0132130807
Course Table Tuples/ Rows
courseId 11111 11112 11113 11114 11115 11116 11117 11118
subjectId CSCI CSCI CSCI CSCI MATH MATH EDUC ITEC
courseNumber 1301 1302 3720 4750 2750 3750 1111 1344
Liang, Introduction to Java Programming, Eighth Edition, (c) 2011 Pearson Education, Inc. All rights reserved. 0132130807
6
Course Table
Relation/Table Name Columns/Attributes
Chapter 37 Java Database Programming
Liang, Introduction to Java Programming, Eighth Edition, (c) 2011 Pearson Education, Inc. All rights reserved. 0132130807
Application Programs System Users Database Management System (DBMS)
e.g., Access, MySQL, Oracle, and MS SQL Server
database
Liang, Introduction to Java Programming, Eighth Edition, (c) 2011 Pearson Education, Inc. All rights reserved. 0132130807
9
Liang, Introduction to Java Programming, Eighth Edition, (c) 2011 Pearson Education, Inc. All rights reserved. 0132130807
Table vs. File
NOTE: A table or a relation is not same as a file. Most of the relational database systems store multiple tables in a file.