如何在Java中正确覆盖toString（）？ [英] How to override toString() properly in Java?

问题描述

听起来有点愚蠢，但我需要帮助我的 toString（）方法，这非常令人讨厌。
我尝试在网上查询，因为 toString 是一个搞砸了，没有找到Kid构造函数＃2，即使它在那里，我会甚至做其他事情，但它不起作用。
好​​的很多，所以这里是我的代码：

Sounds a little stupid, but I need help on my toString() method and it is very irking. I tried looking up online because the toString is the one where it is screwing up and "not finding Kid constructor #2" even though it is there and I would even do something else and it doesn't work. Ok that was a lot so here is my code:

import java.util.*; 
   class Kid {  
      String name; 
      double height; 
      GregorianCalendar bDay; 

      public Kid () { 
         this.name = "HEAD";
         this.height = 1; 
         this.bDay = new GregorianCalendar(1111,1,1); 
      } 

      public Kid (String n, double h, String date) {
      // method that toString() can't find somehow
         StringTokenizer st = new StringTokenizer(date, "/", true);
         n = this.name;
         h = this.height;
      } 

      public String toString() { 
         return Kid(this.name, this.height, this.bDay);
      } 
   } //end class 

好的我上面的toString（我知道，我的第三个参数是关闭的，应该是一个String）关闭。如果我硬编码第三件事的价值就会变得混乱，并说它找不到这个（上面的）。那么我该如何获取日期并将其分解？

Ok So my toString above (I know, my third parameter is off, should be a String) is off. If I hardcode a value in for the third thing it goes haywire and says it can't find this (up above). So how can I get the date and break it up?

调用此类的课程在

class Driver {   
   public static void main (String[] args) {   
      Kid kid1 = new Kid("Lexie", 2.6, "11/5/2009");   
      System.out.println(kid1.toString());
   } //end main method 
} //end class  

我试过研究多个构造函数，它确实没有帮助。
我尝试研究 toString（）方法，并尝试使用我创建的先前 toString（）方法逻辑以前，但这是全新的，所以它从来没有奏效。

I tried researching multiple constructors and it really didn't help. I tried researching toString() methods, and tried using previous toString() methods logic that I created previous but this is brand new so it never worked.

帮助？

推荐答案

toString 应返回 String 。

public String toString() { 
    return "Name: '" + this.name + "', Height: '" + this.height + "', Birthday: '" + this.bDay + "'";
} 

我建议您利用IDE的功能生成 toString 方法。不要手工编写代码。

I suggest you make use of your IDE's features to generate the toString method. Don't hand-code it.

例如，如果只需右键单击源代码并选择 Source>，Eclipse就可以这样做;生成toString

For instance, Eclipse can do so if you simply right-click on the source code and select Source > Generate toString

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