我在试验 toCharArray()
并发现了一些奇怪的行为.
I was experimenting with toCharArray()
and found some strange behavior.
假设 private static final char[] HEX_CHARS = "0123456789abcdef".toCharArray();
System.out.println(HEX_CHARS);
/* prints 0123456789abcdef */
System.out.println("this is HEX_CHARS "+HEX_CHARS);
/* prints [C@19821f */
这背后有什么理论上的原因吗?
Any theoretical reason behind this?
这是因为两次调用中println
的参数不同.
It is because the parameter to println
is different in the two calls.
第一个参数用 char[]
调用,第二个参数用字符串调用,其中 HEX_CHARS
通过调用 .toString() 进行转换
.
The first parameter is called with char[]
and the second is called with a string, where HEX_CHARS
is converted with a call to .toString()
.
println()
有一个接受 charArray 的重写方法.
The println()
have an overriden method that accepts a charArray.
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