a2水 Lecture4 4-1 Java语言基础 Programming in Java JAVA
4-1 Programming in Java Java 语言基础 Lecture4
a2水 提纲 4-2 ·Java程序剖析 ·Java语言基础 >字符集 >类型 》语句 Programming in Java JAVA
4-2 Programming in Java 提纲 • Java 程序剖析 • Java 语言基础 ➢ 字符集 ➢ 类型 ➢ 语句
简单的Java程序 4-3 Java源程序由类定义组成，每个程序中可以 定义若干个类，但只有一个是主类 ·程序类：该类的一个对象定义程序应该做的 工作 ·主类：告诉Java解释器如何运行程序 Programming in Java JAVA
4-3 Programming in Java 简单的Java 程序 • Java 源程序由类定义组成，每个程序中可以 定义若干个类，但只有一个是主类 • 程序类: 该类的一个对象定义程序应该做的 工作 • 主类: 告诉 Java 解释器 如何运行程序
a2k 一个简单的美的定义 4-4 Choose a name public class ClassName Data field declarations (constants and variables) Constructor declarations Method declarations Stored in a file called ClassName.java Programming in Java JAVA
4-4 Programming in Java public class { } 一个简单的类的定义 Choose a name ClassName Data field declarations (constants and variables) Constructor declarations Method declarations Stored in a file called ClassName.java
孟昊的定义 4-5 public class ClassNameRunner public static void main(String[]args) Statements to construct a program object and ask it to perform computations ] Stored in a file called ClassNameRunner.java Programming in Java JAVA
4-5 Programming in Java public class { public static void main(String[] args) { } } 主类的定义 ClassNameRunner Statements to construct a program object and ask it to perform computations Stored in a file called ClassNameRunner.java