将ASCII值32-126作为对象或通过Java中的for循环保存

Question

I'm trying to have all the ASCII characters from 32-126 held as an object in java. Is there a way to hold them through a for loop in Java instead of writing all of them out?

ex. String characters = "abcdefg"; etc.

Answer 1

Remember that chars are just small integers, so you can use a char as an index variable in a loop. There are several possible ways to go about this.

Here's one that gives a char[] result:

char[] carr = new char[95]; // 95 = 126-32+1
for(char ch = 32; ch <= 126; ++ch) 
    carr[ch-32] = ch;
// for a `String` result, add the following line:
String printableAscii = new String(carr);

Here's another way, that ends up with a String result:

StringBuilder sb = new StringBuilder();
for (char ch = 32; ch <= 126; ++ch)
    sb.append(ch);
String printableAscii = sb.toString();