Java Copy String to Array Urgent!

[louboulos]

Hello everyone!

I'm new to java obviously.. :p
I have a question that troubles me 2 days.. :mad:

I have a String s = "Hello".

and an array: String c[] = new String[5];

how can i copy the "H" from String s.charAt(0) to the array c in position c[0] etc etc etc.... ? :D


Thanks in advance masterminds!!! :D :D

[sehudson]

unless you know for sure that your string(in this case 'Hello') is going to be 5 characters long, you shouldnt hard code the size of the string array. Here is what you can do.

String x  =  "hello"

int size = x.length();

String[] charArray = new String[size];

for (int i=0; i<size; i++){
String[i] = x.CharAt(i);
}

[louboulos]

Thx for your reply mate! :D


I did the following but i have a red line under "x.charAt(i);"

import java.util.*;

public class Class1 {
    public static void main(String[] args) {
        
    Scanner keyb = new Scanner( System.in );
    
        String x  =  keyb.next();

        int size = x.length();

        String[] charArray = new String[size];

        for (int i=0; i<size; i++){
            
        charArray[i] = x.charAt(i);
            
        }

[Fubarable]

The error message is telling you exactly what's wrong. You call your variable charArray, but it isn't in fact a charArray, but rather a String array. charAt(...) returns a char not a String. So change the array type.

One other thing, please don't mark your threads as urgent as it implies that you feel your question is more important than any other question in the forum, and many will refuse to answer such questions. I almost didn't.

[louboulos]

you have a point there... but I didn't mean that it was more important than others! It is urgent for me only.. :)

Anyway I'm sorry and thanks for your help!

[Fubarable]

You're welcome. Best of luck.

[sehudson]

so should they cast the character that .charAt(i) returns as a string?

[Fubarable]

so should they cast the character that .charAt(i) returns as a string?

No, you can't cast a primitive char as a String, and while you could change it to a String via the String.valueOf(...) method you certainly don't want to do this. Again, the simplest and correct thing to do is to change the array type of charArray from String[] to char[].

[louboulos]

That doesn't help.... I don't know what is wrong but although the red line is gone, the mistake is the same: "Unexpected Type"

import java.util.*;



public class Class1 {
    public static void main(String[] args) {
        
    Scanner keyb = new Scanner( System.in );
    
        String x  =  keyb.next();

        int size = x.length();

        char[] z = new char[size];

        System.out.println(x.length());
        System.out.println(z.length);
        
          for (int i=0; i < size; i++){
              
           x.charAt(i) = z[i];
            
        }
          }
    }

[Fubarable]

That doesn't help....

How doesn't it help? It fixed your original problem, but of course it won't stop you from creating a new problem, which is what has happened here.

x.charAt(i) = z[i];

Isn't this a little backwards? Think logically what should be happening here.

[louboulos]

lol I'm an idiot! hahaha :D

Thx so much guys!!