JavaScript从另一个变量填充值

Question

大家好我正在使用JavaScript来填充值。我使用这个脚本

String Vegs[]= request.getParameterValues("Vegs"); 
String qty_carrot=request.getParameter("quantity_carrot"); 
String qty_tomato=request.getParameter("quantity_tomato"); 
String qty_cabbage=request.getParameter("quantity_cabbage"); 
String qty[]; 
qty[0]=qty_carrot; 
qty[1]=qty_tomato; 
qty[2]=qty_cabbage; 

，但它说，错误的局部变量数量是尚未初始化..

还当我的代码更改为这个

String qty[]=new array(3); 
qty[0]=qty_carrot; 
qty[1]=qty_tomato; 
qty[2]=qty_cabbage; 

它说阵列不能为分辨率为

堆栈轨迹：@aravind

堆栈轨迹：

org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:103) 
    org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:199) 
    org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:446) 
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:361) 
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:336) 
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:323) 
    org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:564) 
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:357) 
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:405) 
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:349) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:725) 
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) 
    org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:88) 

Answer 1

你必须这样创建数组：

String qty[] = new String[3];//<-- 3 is the size of array, you may change it