java 怎么遍历多个vector

Vector ready=new Vector();
Vector block=new Vector();
Vector finish=new Vector();
ready.addElement(P1);
ready.addElement(P2);
ready.addElement(P3);//P1,P2,P3是实例化的3个类
Vector myvector=new Vector();
myvector.addElement(ready);
myvector.addElement(block);
myvector.addElement(finish);
现在我想通过FOR循环遍历myvector输出每个类P1,P2,P3的相关属性.
不能用3个FOR循环遍历 ready,block,finish,因为每个类P1,P2,P3的相关属性
太多了.急,请给出FOR(){...}的具体代码.谢谢

for (int i=0; i<myvector.size(); i++) {
for (int j=0; j<myvector.get(i).size(); j++) {
//......
}
}