Java cannot find symbol for any Arrays?

Question

So, It's so annoying.

I made 2 programs.

Number #1 :

class Arrays2 {
public static void main(String[] args){
    
    String sentenceBest[] = {"This is the first sentence!"};
    
    char chR[] = sentenceBest.toCharArray();        
    
    for (int counter = 0; counter < chR.length; counter++){
        char now = chR[counter];
        if (now != ' ') {
            System.out.println(now);
        }else {
            System.out.println('.');
        }
    }



}
  }

And for this program it says:

Arrays_ToCjarArray(not working).java:6: cannot find symbol
symbol  : method toCharArray()
location: class java.lang.String[]
char chR[] = sentenceBest.toCharArray();        
                             ^
 1 error

Number #2 Program:

class Arrays_3 {
public static void main(String[] args){
    
    boolean numbers[] [] = new boolean[10] [10];
    
    numbers[9] [8] = true;
    
    System.out.println(numbers[9][8] + "!!!");
    
    
    String names[] = {"Marton", "Balint", "Thomas", "David", "John", "Peter", "Andy", "Daniel", "Josh", "James", "Erling", "Romeo", "Vincent", "Fabian"};
    
    System.out.println("The origional order: ");
    for (int counter = 0; counter < names.length; counter++){
        String newName = names[counter];
        System.out.println(counter + ": " + newName);
    }
    
    
    System.out.println("The Alphabetical order: ");
    
    Arrays.sort(names);
    
    for (int counter2 = 0; counter2 < names.length; counter2++) {
        System.out.println(counter2 + ": " + names);
    }
    
    
}
       }

And the same thing. Cannot find Symbol. Sooo annoying.

Arrays_3.java:21: cannot find symbol
symbol  : variable Arrays
location: class Arrays_3
Arrays.sort(names);
    ^
1 error

I really don't understand this because this source code was from a great(so far) book called Sams teach you Java in 24 hours. So I really don't understand this. Any help would be apreciated well.

Jigar Joshi · Accepted Answer · 2013-07-08 17:50:57Z

12

1.toCharArray() is for String not String[]

2.You need to import Arrays by adding

import java.util.Arrays;

answered Jul 8, 2013 at 17:50

Jigar Joshi

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Luiggi Mendoza · Accepted Answer · 2013-07-08 17:52:46Z

1

In program 1:

String sentenceBest[] = {"This is the first sentence!"};
char chR[] = sentenceBest.toCharArray();

sentenceBest is a String array, not a single String. You should call the toCharArray method from one of the Strings contained in the array. For this case, it should work with:

char chR[] = sentenceBest[0].toCharArray();

In program 2:

Class Arrays comes from java.util.Arrays that looks you haven't imported. Just add the clause:

import java.util.Arrays;

answered Jul 8, 2013 at 17:52

Luiggi Mendoza

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1 Comment

user2547460 Over a year ago

Yeahhh!!! Thanks, it works perfectly by now, you are a great programmer!!! Thanks again!!!

nanofarad · Accepted Answer · 2013-07-08 17:51:16Z

0

You're calling toCharArray on an array. Arrays do not support this. Instead you must call the method on the string with:

char chR[] = sentenceBest[0].toCharArray();

You also need to import java.util.Arrays and figure out what that Arrays on a line by itself is doing.

answered Jul 8, 2013 at 17:51

nanofarad

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1 Comment

user2547460 Over a year ago

Alright, thanks for answering, and now it works! thanks for spending your time solving my problem!! thanks again!!!

jason · Accepted Answer · 2013-07-08 17:56:49Z

0

For your first error, you're trying to invoke String.toCharArray on a String[]. That's not happening because there is not any toCharArray method defined on arrays.

For your second error, you need to import java.util.Arrays.

Sooo annoying.

Sorry, but you have to read the error messages.

I really don't understand this because this source code was from a great(so far) book called Sams teach you Java in 24 hours.

First, they probably leave off the import statements for brevity in the book, but include them in the source code that you can obtain elsewhere (online, included DVD, etc.). Second, are you sure that you typed everything in correctly. Check again.

edited Jul 8, 2013 at 17:56

answered Jul 8, 2013 at 17:51

jason

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