Removing Characters from String

[Conrad McLaughlin]

What is the best way to remove unwanted characters from a string?

* So if the user enters String A, String B is created with unwanted characters removed from A.


String A = "Hello. How Are You?";
THEN
String B = "Hello How Are You";


I have tried something like this:

    
String delimiters = ("[]!?,'");
String B = A.split(delimiters,0);

But I get an lang string array error for some reason.

[Conrad McLaughlin]

Ok. I went on a website and looked at replaceAll method. But when I compile this why is String A is exactly the same?

    
String A = "hello. This is a test";
A.replaceAll(".","");
System.out.println("\n"+A);

[Conrad McLaughlin]

Ok. I went on a website and looked at replaceAll method. But when I compile this why is String A is exactly the same?

    
String A = "hello. This is a test";
A.replaceAll(".","");
System.out.println("\n"+A);

[Keith Lynn]

Strings are immutable. You need to capture the output of the method.

[memati bas]

Hello,
Maybe this methods help you to understand the logic.

 
public void removeChar(char c, String s)
{
String s = "";
for(int a = 0; a < s.length(); a++ )

if(s.charAt(a) != c)
s += c;

}

[memati bas]

Originally posted by memati bas:
Hello,
Maybe this methods help you to understand the logic.

 
public void removeChar(char c, String s)
{
String s = "";
for(int a = 0; a < s.length(); a++ )

if(s.charAt(a) != c)
s += c;

}

Oh soory for the wrong code. The developed codes is at the below.

 
public String removeChar(char c, String s)
{
String s = "";
for(int a = 0; a < s.length(); a++ )

if(s.charAt(a) != c)
s += c;
return s;
}

[fred rosenberger]

To state it a little more explicitly, once a string is created, it CANNOT be changed. So what good are all those "replaceAll()" type methods???

simple. they RETURN a NEW string. so when you call

A.replaceAll(".","");

string A is not changed,, but a brand new string is created where the "." have been replaced with "". you need some new variable, say "String B", and then write this:

String B = A.replaceAll(".","");

A will still contain the original string, and B will be the string you want.