看看这个怎么错了???

[taciya]

class shape{}
class circle extends shape{}
class square extends shape{}
class triangle extends shape{}
public class shapes{
public static shape randshape(int i){
shape switch(i%3){
default:
case 0:return circle;
case 1:return square;
case 2:return triangle;
}
}
public static void main(String args[]){
shape[] s=new shape();
for(int i=0;i<s.length;i++)
s[i]=randshape[i];
}
}
错误信息是
method does not return a value

[chinajava]

default应该放在最后吧
放在最后试试

[forest]

default是可以放在前面的。
错误在于default行没有返回shape对象。

[syl79]

改了一下，看看会不会有帮助：
class shape{}
class circle extends shape{}
class square extends shape{}
class triangle extends shape{}
public class shapes
{
static final int len = 5;
public static shape randshape(int i)
{
switch(i%3) {
default:
case 0:return new circle ();
case 1:return new square ();
case 2:return new triangle ();
}
}
public static void main(String args[])
{
shape s[]=new shape [len];
for(int i=0;i<len;i++) {
s[i]=new shape();
s[i]=randshape(i);
}
}
}