java 门户网站代码，功能齐全，说明完备，是学习的好资料

alter table tbl_name add col_name type 例如,给表增加一列weight mysql>alter table pet add weight int 删除列 alter table tbl_name drop col_name 例如，删除列weight： mysql>alter table pet drop weight 改变列 alter table tbl_name modify col_name type 例如，改变weight的类型： mysql> alter table pet modify weight samllint 另一种方法是： alter table tbl_name change old_col_name col_name type 例如： mysql> alter table pet change weight weight samllint 给列更名 mysql>alter table pet change weight wei 给表更名 alter table tbl_name rename new_tbl 例如，把pet表更名为animal mysql>alter table pet rename animal -alter table tbl_name add col_name type for example, to form an increase in weight mysql> alter table pet add weight int Remove Columns alter table tbl_name drop col_name For example, the deletion of column weight: mysql> alter table pet drop weight change out alter table tbl_name modify col_name type for example, the type of weight change: mysql> alter table pet modify w

简单的甘特图 数据库用XML -simple Gantt database using XML

introduct java program for the java starters.

实现上述图形化界面，点击 open file 按扭，打开文件对话框，选择文件，在文本框中输出所选文件的路径；-To achieve the above graphical interface, click the open file button, open the file dialog box, select the file, in the text box and the output of the selected file path

Jvm 规范说明。The Java Virtual Machine was designed to support the Java programming language. Some concepts and vocabulary from the Java language are thus necessary to understand the virtual machine. This chapter gives enough of an overview of Java to support the discussion of the Java Virtual Machine to follow. Its material has been condensed from The Java Language Specification, by James Gosling, Bill Joy, and Guy Steele. For a complete discussion of the Java language, or for details and examples of the material in this chapter, refer to that book. Readers familiar with that book may wish to skip this chapter. Readers familiar with Java, but not with The Java Language Specification, should at least skim this chapter for the terminology it introduces.-JVM specification. The Java Virtual Machine was designed to support the Java programming language. Some concepts and vocabulary from the Java language are thus necessary to understand the virtual machine. This chapter gives enough of an overv

java课程指导设计J2-jisaofnaufhauifhaoifhaiufhafauifhaui

这里面包含了一百多个JAVA源文件，适合初学有耐性的朋友仔细观看！-contains more than 100 Java source files, suitable for beginners patient friend to watch carefully!

BlogJava 备份文章阅读器(含源码,SWT)-BlogJava backup article reader (including source code, SWT)

复数计算程序，实现复数的加，减乘除计算-program of calculate complex number,carry out the complex number s addition,subtract and multiply and divide.

这是一个用Java socket实现的一个简单的聊天系统 比较简单 对初学者很有帮助-This is a online chatting system by Java Socket. It is a good stuff for new learners.