String strI = String.valueOf(i);

String string = Integer.toString(i);

两种方法都是正确的。

尝试简单的类型转换

char c = (char) i;

Mostly ditto on SimonJ. I really dislike the ""+i idiom. If you say String.valueOf(i), Java converts the integer to a string and returns the result. If you say ""+i, Java creates a StringBuilder object, appends an empty string to it, converts the integer to a string, appends this to the StringBuilder, then converts the StringBuilder to a String. That's a lot of extra steps. I suppose if you do it once in a big program, it's no big deal. But if you're doing this all the time, you're making the computer do a bunch of extra work and creating all these extra objects that then have to be cleaned up. I don't want to get fanatic about micro-optimization, but I don't want to be pointlessly wasteful either.

String strI = String.valueOf(i);

String string = Integer.toString(i);

两种方法都是正确的。

将整数转换为字符串的方法有很多:

1)

Integer.toString(10);

2)

 String hundred = String.valueOf(100); // You can pass an int constant
 int ten = 10;
 String ten = String.valueOf(ten)

3)

String thousand = "" + 1000; // String concatenation

4)

String million = String.format("%d", 1000000)

就我个人而言，我没有看到这段代码有什么不好的地方。

当您想记录一个int值，而记录器只接受一个字符串时，它非常有用。我想说，当你需要调用一个接受String的方法，但你有一个int值时，这样的转换是很方便的。

至于整数之间的选择。toString或String。这完全是个人品味的问题。 .．.内部是字符串。valueOf调用Integer。顺便说一下toString方法。：）