整数到字符串的时间效率-Timeefficiencyofintegertostring

1  

It is highly recommended and encouraged to go through javadocs and source code.

强烈建议并鼓励我们浏览javadoc和源代码。

First of all, StringBuilder sb = new StringBuilder(i); will create a StringBuilder of size i with no value. So correct one is new StringBuilder(String str) to create a new StringBuilder of same value as str

首先,StringBuilder sb = new StringBuilder(i);将创建一个大小为i的StringBuilder,没有任何值。所以正确的一个是新的StringBuilder(String str)来创建一个与str相同值的新StringBuilder

Second, + operator uses toString() method of objects to convert the argument to string.

其次,+运算符使用toString()方法将对象转换为字符串。

Third, Integer.toString(i); and String.valueOf(i); are same. Under the hood String.valueof(int i) invokes Integer.toString(i)

三,Integer.toString(i);和String.valueOf(i);是一样的。在引擎盖下String.valueof(int i)调用Integer.toString(i)

So using Integer.toString(i) make more sense as it'll be more readable and indicating the intent of changing an integer to string.

所以使用Integer.toString(i)更有意义,因为它更具可读性,并指示将整数更改为字符串的意图。