問題如上，小白求一個好的方法來實作。不太懂java相關語法。
public class Rectangle
{
private int length;
private int width;
public Rectangle(int length, int width)
{
this.length = length;
this.width = width;
}
public int calArea()
{
return length * width;
}
}
public class Cube extends Rectangle
{
private int height;
public Cube(int length, int width, int height)
{
//在此處添加代碼為類的所有屬性賦值;在提交函式實作代碼時，請洗掉此注釋
}
public int calArea()
{
//在此處添加代碼，回傳Cube的體積；在提交函式實作代碼時，請洗掉此注釋
}
}
uj5u.com熱心網友回復：
這不是 java 最基礎的知識嗎？public class Rectangle
{
private int length;
private int width;
public Rectangle(int length, int width)
{
this.length = length;
this.width = width;
}
public int calArea()
{
return length * width;
}
}
public class Cube extends Rectangle
{
private int height;
public Cube(int length, int width, int height)
{
super(length, width); //呼叫父類構造方法
this.height = height;
}
public int calArea()
{
return super.calArea()*height; //呼叫父類算面積的方法
}
}
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標籤：Java相關