line feed

[Jim Frank]

I am getting a String from a TextArea. Ascii 10 and 9 convert to blocks
[]. I want to convert these blocks to the unicode linefeed and tab, put cannot. How would I replace these blocks with the proper unicode characters. I am using 1.3, and cannot change. Thanks

[Stan James]

In 1.3 you don't get String.replace() but you can write your own using indexOf() and substring() to find the delimiters and break up the bits. Here's part of one I did in my first J++ project:

lBegin = aSource.indexOf( aOld );
while ( lBegin >= 0 )
{
   StringBuffer strbfr = new StringBuffer();
   strbfr.append( source.substring( 0,begin ) );     // copy from start up to replacement point.
   strbfr.append( new);                              // add the replacement string
   strbfr.append( aSource.substring( begin+size ) ); // add the rest of the statement
   source = strbfr.toString();
   begin  = aSource.indexOf( old );
}

Ouch, this is pretty bad! See if you can make it a lot better by keeping the output separate from the input. This also loops until the heap explodes if "new" contains "old", eg replace "BERT" by "ROBERT".

[Niki Nono]

 
String newS="";
String oldS="a[]b[]c";
int f1=0,f2=0;
String replStr=" ";
while(true)
{
f1=oldS.indexOf('[',f2);
if(f1==-1)
{
newS+=oldS.substring(f2);
break;
}
newS+=oldS.substring(f2,f1) + replStr;
f2=f1+1;
}
System.out.println("Old=" + oldS);
System.out.println("New=" + newS);
 

the above snippet replaces the '[' character. you can customise it accordingly to replace whichever character you want.

[Jim Frank]

Thanks. I can replace the block, but the Unicode character comes out as a block too. I converted to a byte array and the value is 10, but it still comes out as a block in the String. Is this a problem with 1.2, 1.3?
I use \n and other unicode values to replace what is in there.