笔记：两种不同类型的简单Stack实现（Java）

public class FixedCapacityStackOfStrings {
private String[] a;
private int N;
public FixedCapacityStackOfStrings(int cap){
a=new String[cap];
}
public boolean isEmpty(){return N==0;}
public int size()		{return N;}

public void push(String item){
a[N++]=item;
}

public String pop(){

return a[--N];
}
}

public class FixedCapacityStack<Item> {
private Item[] a;
private int N;

public FixedCapacityStack(int cap){
a=(Item[]) new Object[cap];
}
public boolean isEmpty(){
return N==0;
}
public int size(){
return N;
}
public void push(Item item){
a[N++]=item;
}
public Item pop(){
return a[--N];
}
}

array=(Item[]) new Object[size]