使用Integer.toString (tmpInt) .trim ();

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.

这是可以接受的，但我从来没有写过这样的东西。我更喜欢这样:

String strI = Integer.toString(i);

这取决于你想如何使用你的String。这可以帮助:

String total =  Integer.toString(123) + Double.toString(456.789);

我知道的另一种方法来自Integer类:

Integer.toString(int n);
Integer.toString(int n, int radix);

一个具体的例子(尽管我认为你不需要):

String five = Integer.toString(5); // returns "5"

它也适用于其他基本类型，例如Double.toString。

请看这里了解更多细节。

尝试简单的类型转换

char c = (char) i;