?? polytesster.java.bak
字號:
abstract class SuperClass
{
abstract int display();
}
class SubClassA extends SuperClass
{
private int n;
public SubClassA (int n){
this.n=n;
}
public int display(){
return (1+n)*n/2;
}
}
class SubClassB extends SuperClass
{
private int n;
public SubClassB (int n){
this.n=n;
}
public int display(){
int ji=1;
int i;
for (i=1;i<=n ;i++ )
{
ji*=i;
}
return ji;
}
}
public class PolyTesster
{
public static void main(String args[])
{
SuperClass array[]=new SuperClass[2];
array[0]=new SubClassA(6);
array[1]=new SubClassB(6);
for (int in=1;in<2;in++ ){
System.out.println("這是和"+array[0].display());
System.out.println("這是積"+array[1].display());
}
}
}
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -