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public class KStack
{
private KNode head;
private int length;
public KStack()
{
length = 0;
}
public int[] peek()
{
return head.getData();
}
public int[] pop()
{
int[] output = head.getData();
head = head.getNext();
length--;
return output;
}
public void push(int[] i)
{
head = new KNode(i,head);
length++;
}
public boolean hasNext()
{
return head != null;
}
public int getLength()
{
return length;
}
public String toString()
{
String output = "";
for(KNode tmp = head; tmp != null; tmp=tmp.getNext())
{
output += tmp.getData() + " ";
}
return output;
}
public int[][] toArray()
{
int[][] output = new int[length][4];
int i = length-1;
for(KNode tmp = head; tmp != null; tmp = tmp.getNext())
{
output[i] = tmp.getData();
i--;
}
return output;
}
}
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