手動實現單向鏈表

public class SingleLinkDemo {
	public static void main(String[] args) {
		SingleLink link = new SingleLink();
		link.addNode("1");
		link.addNode("2");
		link.addNode("3");
		link.addNode("4");
		link.printNode();
		link.deleteNode("3");
		link.printNode();
		
	}
}

class SingleLink{
	class Node{
		private Node next;
		private String data;
		
		public Node(String data){
			this.data = data;
		}
		
		public void add(Node newNode){
			if(this.next==null){
				this.next = newNode;
			}else{
				this.next.add(newNode);
			}
		}
		
		public void print(){
			System.out.println(this.data);
			if(this.next!=null){
				this.next.print();
			}
		}
		
		public boolean search(String data){
			if(data.equals(this.data)){
				return true;
			}else{
				if(this.next!=null){
					return this.next.search(data);
				}else{
					return false;
				}
			}
		}
		
		public void delete(Node prev,String data){
			if(data.equals(this.data)){
				prev.next = this.next;
			}else{
				if(this.next!=null){
					this.next.delete(this, data);
				}
			}
		}
	}
	private Node root;
	public void addNode(String data){
		Node newNode = new Node(data);
		if(this.root==null){
			this.root = newNode;
		}else{
			this.root.add(newNode);
		}
	}
	
	public void printNode(){
		if(this.root!=null){
			this.root.print();
		}
	}
	
	public boolean contains(String data){
		return this.root.search(data);
	}
	
	public void deleteNode(String data){
		if(this.contains(data)){
			if(this.root.data.equals(data)){
				this.root = this.root.next;
			}else{
				this.root.next.delete(root, data);
			}
		}
	}
}