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Copy pathStackSLinked.java
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57 lines (45 loc) · 1.02 KB
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package Stack;
import NodeList.SLNode;
public class StackSLinked implements Stack {
private SLNode top;
private int size;
public StackSLinked() {
// TODO Auto-generated constructor stub
top=null;
size=0;
}
@Override
public int getSize() {
// TODO Auto-generated method stub
return size;
}
@Override
public boolean isEmpty() {
// TODO Auto-generated method stub
return size==0;
}
@Override
public void push(Object e) {
// TODO Auto-generated method stub
SLNode q=new SLNode(e,top);
top=q;
size++;
}
@Override
public Object pop() throws StackEmptyException {
// TODO Auto-generated method stub
if(size<1)
throw new StackEmptyException("错误，空栈");
Object obj=top.getData();
top=top.getNext();
size--;
return obj;
}
@Override
public Object peek() throws StackEmptyException {
// TODO Auto-generated method stub
if(size<1)
throw new StackEmptyException("错误，空栈");
return top.getData();
}
}