1.如何将建立eclipse的快捷方式?在桌面单击右键选择新建启动器,填上名字和命令的路径(即/opt/eclipse/eclipse).2.如何显示行号?答:选择Window->Preferences,然后选择General->Editors->Text Editors,把show line numbers选项勾上3.如何改变java源文件字体大小?答:选择Window->
JS自带函数
concat
将两个或多个字符的文本组合起来，返回一个新的字符串。
var a = "hello";
var b = ",world";
var c = a.concat(b);
alert(c);
//c = "hello,world"
indexOf
返回字符串中一个子串第一处出现的索引（从左到右搜索）
1、端口被占用
Several ports (8005, 8080, 8009) required by Tomcat v6.0 Server at localhost are already in use. The server may already be running in another process, or a system process may be using the port
