close
程式碼:
package inheritance;
public class Inheritance
{
private int x;
public int getX()
{
return x;
}
public Inheritance()
{
this.x=0; //沒有傳參數的初始化
}
public Inheritance(int y)
{
this.x=y; //有傳參數的初始化
}
public static void main(String [] args)
{
Inheritance t1=new Inheritance(3);
Inheritance t2=new Inheritance(3);
if(!t1.equals(t2))
System.out.println("they're not equal");
else
{
System.out.println("they're equal");
}
if(t1 instanceof Object)
System.out.println("t1's an Object");
}
public boolean equals(Object o)
{
return this.x==((Inheritance)o).getX();
}
}
顯示結果:
they're equal
t1's an Object
2. 程式碼:
class Fother
{
public void Fothersay()
{
System.out.println("today is sunday");
}
}
class Son extends Fother
{
public void Sonsay()
{
System.out.println("I want drink ice tea!");
}
}
public class Inheritance
{
public static void main(String[] args)
{
Fother Hank=new Fother();
Hank.Fothersay();
Son Mark=new Son();
Mark.Fothersay();
Mark.Sonsay();
}
}
顯示結果:
顯示結果:
today is sunday
today is sunday
I want drink ice tea!
範例 3.
class Fother
{
public void Fothersay()
{
System.out.println("today is sunday");
}
}
class SonMark extends Fother
{
public void Sonsay()
{
System.out.println("I want drink ice tea!");
}
}
class SonTank extends Fother
{
public void Sonsay()
{
System.out.println("I want drink ice tea!");
}
}
public class Inheritance
{
public static void main(String[] args)
{
SonMark grandsonHarry=new SonMark();
//子物件
SonTank grandsonTarry=new SonTank();
//子物件
say(grandsonHarry);
say(grandsonTarry);
}
//父參考控制子物件
public static void say(Fother Hank)
{
Hank.Fothersay();
}
}
顯示結果:
today is sunday
today is sunday
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