How to add chars to a String

Hi,
I want to construct a string by adding characters to it.
How can I do this ?

Never mind, yes it will work (except that you have to
initialize the string first, like s = "something";)
before using +=. Sorry.actually, you don't. s += "foo" is really shorthand for s = s + "foo".
since the reference s is equal to null, the value null is converted to the String "null".
therefore, String s = null;
s += "foo";has the same effect as
String s = "null" + "foo";so, strictly speaking, you don't have to initialize s to a non-null value, but if you don't, you're not going to get anything you'd like...
and, StringBuffer is definitely the way to go here; otherwise, each time you concatenate a character to your String, you're creating a new Character object and a new String object.
Larry

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sirs,
i have written a method in java which will return a randomly generated string of a fixed length. i am creating one one character and inserting it into char array.
at last i am converting it to string
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if i am doing like this..
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import javax.swing.text.*;
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import java.awt.Font;
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regards
Tim

How to get a char from a String Class?

How to get a char from a String Class?

Use charAt(int index), like this for example:
String s = "Java";
char c = s.charAt(2);
System.out.println(c);

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1234
instead of 1236
So when i press a button on the JWindow... it should display
123
so that i can enter 6 now.
I tried to display the string "123 " instead over "1234" but it is not working when the no background is specified. but works fine when a background color is specified.
The string is displayed as
Graphics2D g = (Graphics2D)window.getGraphics();
AttributedString as = new AttributedString(string, map);
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Deja vu. I saw this kind of post before, and I'm sure
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