遇到了無法攻克的難題，為什么我的測試類有錯(cuò)?。空埓笊駧蛶兔?！感激不盡
package package2;
public abstract class Shape {
public abstract void zhouchang();
public abstract void mianji();
}
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package package2;
public class Rectangle extends Shape{
@Override
public void zhouchang() {
// TODO Auto-generated method stub
double length=10;
double wide=10;
double perimeter=(length+wide)*2;
}
@Override
public void mianji() {
// TODO Auto-generated method stub
double length=10;
double wide=10;
double area=length*wide;
}
}
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package package2;
public class Circle extends Shape{
@Override
public void zhouchang() {
// TODO Auto-generated method stub
double radius=5;
? ? final double P=3.14;
double perimeter=2*P*radius;
}
@Override
public void mianji() {
// TODO Auto-generated method stub
double radius=5;
? ? final double P=3.14;
double area=P*radius*radius;
}
}
-------------------------------------
package package2;
public class test {
? ?Shape Rec=new Rectangle();
? ?Rec.zhouchang();
? ?Rec.mianji();
? ?Shape Cir=new Circle();
? ?Cir.zhouchang();
? ?Cir.mianji();
}
2018-10-18
你方法里沒寫輸出語句
2018-10-23
你沒有主方法，子類里面沒有輸出語句