char Array difficulties

Question

I hope the evening finds you well. My problem tonight is that I'm trying to create a char array, but I can't use any of the good ways to do it. I can only use String.length and String.charAt() my code is a miserable sad mess. This kind of combines all the things I've ever been terrible at so far.

Ultimately what I'll be trying to do is find a way to insert, delete, and replace things given certain indexes of a user-input string, but one step at a time, right?

This is what I have right now for my insert method, it's not even close to done obviously. All I'm really trying to figure out here, is how to print out my array, because when I try to print it out right now its just printing blanks. I apologize for my ineptitude.

 public String insert_text(String fromtest){


    System.out.println(fromtest.length());

    System.out.println(fromtest);
    for(int i=0;i<fromtest.length();i++){
        text=new char[fromtest.charAt(i)];
        System.out.println(text[i]);
    }

    System.out.println("* Enter the starting position:");
    int startpos=k.nextInt();

    System.out.println("* Enter the text you want to insert:");
    String instring=k.next();

    return fromtest;

}

I'm not sure why, but the prompt just say that the only things we can use are Sting.Length and String.charAt and store them to an array which I forgot to mentioned should be private char [] text.

Convert first you string in char array using toArray function. — Java_Alert
– Java_Alert, Commented Dec 10, 2013 at 5:36
new char[fromtest.charAt(i)] does not make any sense at all. You're using the int value of a character as the size of an array. Why? What are you trying to accomplish with that for loop? For that matter, what exactly is this entire method supposed to do? — Matt Ball
– Matt Ball, Commented Dec 10, 2013 at 5:39
This seems like homework? i'm guessing your not permitted to use the toCharArray() method? — Paperwaste
– Paperwaste, Commented Dec 10, 2013 at 5:39
You are correct, not allowed to use toCharArray(), it indeed is homework I swear I'm not looking for answers just guidance. — Nicholas Brandon
– Nicholas Brandon, Commented Dec 10, 2013 at 5:42

Sameer Sawla · Accepted Answer · 2013-12-10 05:39:48Z

1

String.toCharArray() is the function that you are looking for. It converts the String into equivalent Char array.

Convert an input String to char[] as the following sample code:

public static void main(String args[])
{
 String str = "Sameer";
 char[] cArray = str.toCharArray();
 //Now perform functions with your charArray
}

Hope this helps.

answered Dec 10, 2013 at 5:39

Sameer Sawla

7396 silver badges21 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Elliott Frisch · Accepted Answer · 2013-12-10 06:24:43Z

0

Why can't you use

char [] input = fromtest.toCharArray(); // get's the character array as called...

if you can't use toCharArray you could try

char [] array = new char[fromtest.length()];
for (int i = 0; i < fromtest.length(); i++) {
  array[i] = fromtest.charAt(i);
}

edited Dec 10, 2013 at 6:24

answered Dec 10, 2013 at 5:35

Elliott Frisch

202k20 gold badges166 silver badges265 bronze badges

2 Comments

Nicholas Brandon Over a year ago

I'm not sure, that is just part of the parameter that I'm getting. I believe the goal is to learn more about Arrays and get a good grasp on them (it's homework). I've been trying hard for hours. I tried hitting it, I tried yelling at it, I even tried calling it names, but nothing has seemed to work so far.

Nicholas Brandon Over a year ago

You are my hero, that's kind of what I was going for, I just clearly did a terrible job. Thank you so much for your help. That syntax will help me so much moving forward.

Nishan · Accepted Answer · 2013-12-10 05:37:24Z

0

You can print each char by :

System.out.println(fromtest.charAt(i));

answered Dec 10, 2013 at 5:37

Nishan

2,9014 gold badges28 silver badges36 bronze badges

1 Comment

Nicholas Brandon Over a year ago

Thank you very much, that will be quite useful.

Java_Alert · Accepted Answer · 2013-12-10 05:39:10Z

0

         public String insert_text(String fromtest){


          Char[] charArray = fromtest.toCharArray();
           // do whateveryou want;   
          return fromtest;
   }

answered Dec 10, 2013 at 5:39

Java_Alert

1,1796 gold badges25 silver badges51 bronze badges

Comments

Sarz · Accepted Answer · 2013-12-10 05:41:57Z

0

So far i understand your problem is you need to make dynamic array of what String is passed in this function,

use char[] charArray = string.toCharArray();

but what you are doing i prefer you stack and queues

answered Dec 10, 2013 at 5:41

Sarz

1,9764 gold badges23 silver badges44 bronze badges

1 Comment

Nicholas Brandon Over a year ago

Thats true, but it is my understanding that we are not allowed to use to.CharArray();

Collectives™ on Stack Overflow

char Array difficulties

5 Answers 5

Comments

2 Comments

1 Comment

Comments

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

5 Answers 5

Comments

2 Comments

1 Comment

Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related