How to Convert a Char Array Back to a String?
I Have a Char Array: Char[] a = {'H', 'E', 'L', 'L', 'O', ' ', 'W', 'O', 'R', 'L', 'D'}; My Current Solution Is to Do String B = New String(A); but Surely...
I have a char array:
char[] a = {'h', 'e', 'l', 'l', 'o', ' ', 'w', 'o', 'r', 'l', 'd'};
My current solution is to do
String b = new String(a);
But surely there is a better way of doing this?
No, that solution is absolutely correct and very minimal.
Note however, that this is a very unusual situation: Because String is handled specially in Java, even "foo" is actually a String. So the need for splitting a String into individual chars and join them back is not required in normal code.
Compare this to C/C++ where "foo" you have a bundle of chars terminated by a zero byte on one side and string on the other side and many conversions between them due do legacy methods.
String text = String.copyValueOf(data);
or
String text = String.valueOf(data);
is arguably better (encapsulates the new String call).
This will convert char array back to string:
char[] charArray = {'a', 'b', 'c'};
String str = String.valueOf(charArray);
String str = "wwwwww3333dfevvv";
char[] c = str.toCharArray();
Now to convert character array into String , there are two ways.
Arrays.toString(c);
Returns the string [w, w, w, w, w, w, 3, 3, 3, 3, d, f, e, v, v, v].
And:
String.valueOf(c)
Returns the string wwwwww3333dfevvv.
In Summary: pay attention to Arrays.toString(c), because you'll get "[w, w, w, w, w, w, 3, 3, 3, 3, d, f, e, v, v, v]" instead of "wwwwww3333dfevvv".
A String in java is merely an object around an array of chars. Hence a
char[]
is identical to an unboxed String with the same characters. By creating a new String from your array of characters
new String(char[])
you are essentially telling the compiler to autobox a String object around your array of characters.
Just use String.value of like below;
private static void h() {
String helloWorld = "helloWorld";
System.out.println(helloWorld);
char [] charArr = helloWorld.toCharArray();
System.out.println(String.valueOf(charArr));
}
package naresh.java;
public class TestDoubleString {
public static void main(String args[]){
String str="abbcccddef";
char charArray[]=str.toCharArray();
int len=charArray.length;
for(int i=0;i<len;i++){
//if i th one and i+1 th character are same then update the charArray
try{
if(charArray[i]==charArray[i+1]){
charArray[i]='0';
}}
catch(Exception e){
System.out.println("Exception");
}
}//finally printing final character string
for(int k=0;k<charArray.length;k++){
if(charArray[k]!='0'){
System.out.println(charArray[k]);
} }
}
}
//Given Character Array
char[] a = {'h', 'e', 'l', 'l', 'o', ' ', 'w', 'o', 'r', 'l', 'd'};
//Converting Character Array to String using String funtion
System.out.println(String.valueOf(a));
//OUTPUT : hello world
Converting any given Array type to String using Java 8 Stream function
String stringValue =
Arrays.stream(new char[][]{a}).map(String::valueOf).collect(Collectors.joining());
Try to use java.util.Arrays. This module has a variety of useful methods that could be used related to Arrays.
Arrays.toString(your_array_here[]);
Try this
Arrays.toString(array)
String output = new String(charArray);
Where charArray is the character array and output is your character array converted to the string.
Try this:
CharSequence[] charArray = {"a","b","c"};
for (int i = 0; i < charArray.length; i++){
String str = charArray.toString().join("", charArray[i]);
System.out.print(str);
}
You can also use StringBuilder class
String b = new StringBuilder(a).toString();
Use of String or StringBuilder varies with your method requirements.
1 alternate way is to do:
String b = a + "";
Sarah Jenkins is a veteran tech journalist with over 12 years of experience covering artificial intelligence, mobile innovations, and digital ethics. Her insights have appeared in leading technology publications worldwide.
