Preserve linebreaks from text to html
Hi,
I am using a JTextArea to allow the user to type in text, which is then displayed alongwith some other text in a JEditorPane.
The content type for the JEditorPane is text/html
The content is displayed with all the formatting that I am applying, but the linebreaks entered by the user are lost.
Anyway that I can preserve these? I cant use String.replace() because that only takes chars, not Strings. Else I might have tried to replace "\n" with "
"
Any ideas?...
[548 byte] By [
dewangs] at [2007-9-26 2:37:25]
use this string replace method.
public static String replaceString( String source, String replaceThis, String withThis, boolean all ) {
StringBuffer result = new StringBuffer();
int length = source.length();
int lengthThis = replaceThis.length();
int index, lastIndex = 0;
do {
index = source.indexOf( replaceThis, lastIndex );
if( index < 0 ) break;
result.append( source.substring( lastIndex, index ) );
result.append( withThis );
lastIndex = index + lengthThis;
} while( all );
if( lastIndex < length ) {
result.append( source.substring( lastIndex ) );
}
return new String( result );
}
well, you can try this code but you should debug it first ...
String result = ....;
do
{
int i = result.indexOf( '\n' );
if( i != -1 )
{
String t1 = result.substring( 0, i );
String t2 = result.substring( i+1 );
result = t1 + "
" + t2;
}
} while( i != -1 );
// use result ...
Better suggestions ?
If you are filtering very long strings with plenty of newLines, you could consider using StringBuffer.
igarn at 2007-6-29 10:06:43 >
Very similar to other posts:
StringTokenizer st = new StringTokenizer(yourString, "\n".intern());
int resultLen = yourString.length() + (st.countTokens() * 3); //
- \n
StringBuffer sb = new StringBuffer(resultLen);
sb.append(st.nextToken());
while (st.hasMoreTokens()) {
sb.append("
".intern());
sb.append(st.nextToken());
}
String result = sb.toString();
Here I tried to be as carefull as I can with the use of Strings, so I've used the intern() method and StringBuffer.
[nobr]hey, thanks!
I sat to think about it and came up with pretty much the same thing myself!
public static String htmlFormatLineBreaks(String text)
{
StringTokenizer st = new StringTokenizer(text,"\n");
StringBuffer buf = new StringBuffer(text.length());
if(st.countTokens() == 1)
{
return text;
}
else
{
int ct = 0;
while(st.hasMoreTokens())
{
if(ct > 0)
{
buf.append("<BR>");
}
buf.append(st.nextToken());
ct++;
}
return buf.toString();
}
}
U063667,
Your code does include the length of the BR in the StringBuffer size, I hadnt added that...
What exactly is the string.intern() ? I have not used that before.[/nobr]
intern() is a String's method to get the canonical representation of a String.The String class keeps a pool of strings that you can reuse, saving time and memory. One thing not to forget is that object creation in Java is a very expensive task.
