double num1=Double.parseDouble(request.getParameter("num1"));
double num2=Double.parseDouble(request.getParameter("num2"));
double result=biz.add(num1, num2);
request.setAttribute("result", result);《The method setAttribute(String, Object) in the type ServletRequest is not applicable for the arguments (String, double)》该怎么把double转换成Object类型? 在线等!!谢谢!!
double num2=Double.parseDouble(request.getParameter("num2"));
double result=biz.add(num1, num2);
request.setAttribute("result", result);《The method setAttribute(String, Object) in the type ServletRequest is not applicable for the arguments (String, double)》该怎么把double转换成Object类型? 在线等!!谢谢!!
double result=biz.add(num1, num2);Double doub = new Double(result);request.setAttribute("result", doub);
Window>Preferences>Java>Java Compiler, 目标设置成1.5或1.6
如果是项目设置
Project>Preference>后面一样
Double num2=Double.parseDouble(request.getParameter("num2"));
Double result=biz.add(num1, num2);
request.setAttribute("result", result);
add方法这样写。
public Double add(Double num1,Double num2){
return (Double)(num1+num2);
}