45 lines
735 B
Java
45 lines
735 B
Java
public class SimpleList{
|
|
|
|
private class Node{
|
|
public Object elem;
|
|
public Node next;
|
|
}
|
|
|
|
public SimpleList(){
|
|
node=null;
|
|
len=0;
|
|
}
|
|
|
|
public boolean isEmpty(){
|
|
return node==null;
|
|
}
|
|
|
|
public int size(){
|
|
return len;
|
|
}
|
|
|
|
public Object head(){
|
|
if(node==null)
|
|
return null;
|
|
else
|
|
return node.elem;
|
|
}
|
|
|
|
public void addHead(Object nuovo){
|
|
Node tmp=new Node();
|
|
tmp.elem=nuovo;
|
|
tmp.next=node;
|
|
node=tmp;
|
|
len++;
|
|
}
|
|
|
|
public void remHead(){
|
|
if(node!=null){
|
|
node=node.next;
|
|
len--;
|
|
}
|
|
}
|
|
|
|
protected Node node;
|
|
protected int len;
|
|
} |