Question

Return type for the method is missing怎么回事

import java.util.Vector;
class MyCircle
{
//private double m_r,m_hou;
private double m_r;
private double m_hou;
public MyCirlce(double r,double hou)
{
//r=m_r;
//hou=m_hou;
m_r=r;
m_hou=hou;
}
public MyCirlce(double r)
{
//r=m_r;
//m_hou=0.1;
m_r=r;
m_hou=0.1;
}
public double getTiji()
{
return Math.PI*m_r*m_r*m_hou;
}
}
public class App1
{
public static void main(String[] args)
{
Vector a=new Vector();
//MyCircle a=new MyCircle(2.5,0.6);
//MyCircle a=new MyCircle(2.5);
a.add(new MyCircle(2.5,0.2));
a.add(new MyCircle(2.5));

for(int i;i<a.size();i++)
{
MyCircle x=(MyCircle)a.get(i);
System.out.println("Circle"+x.getTiji());
}
}

}
程序代码
哈哈，我知道啦！我简直无语了，太粗心了，也缺乏考察，对不住大家。

Answer 1

我刚要问....