Is there a way to concatenate char
to form a String
in Java?
Example:
String str;
Char a, b, c;
a = 'i';
b = 'c';
c = 'e';
str = a + b + c; // thus str = "ice";
This question is related to
java
Use str = ""+a+b+c;
Here the first +
is String
concat, so the result will be a String
. Note where the ""
lies is important.
Or (maybe) better, use a StringBuilder
.
Use the Character.toString(char)
method.
If the size of the string is fixed, you might find easier to use an array of chars. If you have to do this a lot, it will be a tiny bit faster too.
char[] chars = new char[3];
chars[0] = 'i';
chars[1] = 'c';
chars[2] = 'e';
return new String(chars);
Also, I noticed in your original question, you use the Char class. If your chars are not nullable, it is better to use the lowercase char type.
Try this:
str = String.valueOf(a)+String.valueOf(b)+String.valueOf(c);
Output:
ice
You can use StringBuilder:
StringBuilder sb = new StringBuilder();
sb.append('a');
sb.append('b');
sb.append('c');
String str = sb.toString()
Or if you already have the characters, you can pass a character array to the String constructor:
String str = new String(new char[]{'a', 'b', 'c'});
Source: Stackoverflow.com