为什么java中的toString方法似乎对数组不起作用 [英] Why does the toString method in java not seem to work for an array

问题描述

我想使用 java 中的 toString() 方法将字符数组转换为字符串对象.这是我使用的测试代码片段:

I want to convert a character array to a string object using the toString() method in java. Here is a snippet of the test code I used:

import java.util.Arrays;
class toString{
    public static void main(String[] args){
        char[] Array = {'a', 'b', 'c', 'd', 'e', 'f'};
        System.out.println(Array.toString());
        }
}

原则上应该打印abcdef，但它打印的是[C@6e1408或[C@e53108之类的随机乱码> 每次程序执行时.我不需要其他选择，但想知道为什么会发生这种情况.

In principle, it should print abcdef, but it is printing random gibberish of the likes of [C@6e1408 or [C@e53108 each time the program executes. I don't need an alternative out of this but want to know why this is happening.

推荐答案

要获得人类可读的 toString()，您必须使用 Arrays.toString()，像这样:

To get a human-readable toString(), you must use Arrays.toString(), like this:

System.out.println(Arrays.toString(Array));

Java 对数组的 toString() 是打印 [，后跟一个表示数组元素类型的字符(在您的情况下为 Ccode> 表示 char)，然后是 @，然后是数组的身份哈希码"(把它想象成内存地址").

Java's toString() for an array is to print [, followed by a character representing the type of the array's elements (in your case C for char), followed by @ then the "identity hash code" of the array (think of it like you would a "memory address").

这种可悲的事态通常被认为是 Java 的错误".

This sad state of affairs is generally considered as a "mistake" with java.

有关其他错误"的列表，请参阅此答案.

See this answer for a list of other "mistakes".

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