本章主要采用分组讨论和课堂讲授方法。 第二章Data and Expressions (一)目的与要求 1.Discuss the use of character strings,concatenation,and escape Sequences. 2.Explore the declaration and use of variables 3.Describe the Java primitive data types. 4.Discuss the syntax and processing of expressions. 5.Define the types of data conversions and the mechanisms for Accomplishing them. 6.Introduce the Scanner class to create interactive programs. (二)教学内容 第一节Character strings 1.主要内容 (1)The print and printIn Methods (2)String Concatenation (3)Escape Sequences 2.基本概念和知识点 (1)The print and println methods represent two services provided by the System.out object. (2)An escape sequence can be used to represent a character that would otherwise cause compilation problems 3.问题与应用（能力要求） 掌握字符串的使用方法，包括连接符与转义符 第二节Variables and Assignment 1.主要内容 (1)Variables (2)The Assignment Statement (3)Constants 2.基本概念和知识点 (1)A variable is a name for a memory location used to hold a value of a particular data type. (2)Accessing data leaves it intact in memory,but an assignment statement overwrites the old data.5 本章主要采用分组讨论和课堂讲授方法。 第二章 Data and Expressions （一）目的与要求 1．Discuss the use of character strings, concatenation, and escape Sequences. 2．Explore the declaration and use of variables. 3．Describe the Java primitive data types. 4．Discuss the syntax and processing of expressions. 5．Define the types of data conversions and the mechanisms for Accomplishing them. 6．Introduce the Scanner class to create interactive programs. （二）教学内容 第一节 Character Strings 1．主要内容 (1) The print and println Methods (2) String Concatenation (3) Escape Sequences 2．基本概念和知识点 (1) The print and println methods represent two services provided by the System.out object. (2) An escape sequence can be used to represent a character that would otherwise cause compilation problems. 3．问题与应用（能力要求） 掌握字符串的使用方法，包括连接符与转义符 第二节 Variables and Assignment 1．主要内容 (1) Variables (2) The Assignment Statement (3) Constants 2．基本概念和知识点 (1) A variable is a name for a memory location used to hold a value of a particular data type. (2) Accessing data leaves it intact in memory, but an assignment statement overwrites the old data