我们如何创建双链表节点到以逗号分隔的字符串？ [英] How do we create double linked list nodes to a string separated by comma?

问题描述

我一直在研究一个项目，它要求我在双链接列表接口中生成一个toString（）。我们可以使用StringBuilder和追加方法，但我想通过返回它们而不使用任何内置的java方法来使它有点基本。



我是什么尝试过：

I've been working on a project, and it requires me to generate a toString() in a Double Linked List Interface. We could use a StringBuilder, and appending method, but I wanted to make it a bit basic by just returning them without any inbuilt java method.

What I have tried:

@Override
	public String toString()
	{
		String result = "";
		DoubleLinkedNode currentNode = this.firstNode;
		while(currentNode != null) {
			System.out.print(current.data + ",  "); 
			result += currentNode.data.toString() +" , ";
			currentNode = currentNode.next;
		}
		String now = " .";
		
		
		return result + now; // this is returned in case bag is empty.
		
		
	}

预计：

Expected :

"a", "q", "%", "asdf"

输出：

Output:

asdf,  123,  q,  a,  asdf , 123 , q , a ,  .

推荐答案

引用：

他们说我们可以使用StringBuilder和追加方法，但是我想通过返回它们而没有任何内置的java方法来使它有点基础

They said that we could use a StringBuilder, and appending method, but I wanted to make it a bit basic by just returning them without any inbuilt java method

它们是对的，然而。

使用StringBuilder可以使您的代码更加清晰，高效并且可能正确。

请参阅：例如： string - 何时在Java中使用StringBuilder - Stack Overflow [ ^ ]。

They are right, however.
Using the StringBuilder would make your code more clear, efficient and possibly correct.
See, for instance: string - When to use StringBuilder in Java - Stack Overflow[^].

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