Need a string helper function

[Monoj Roy]

String s ="tHis is A TEST String"

String modify(String s){
String modifiedString =s ;

//do some modification and return.

return modifiedString
}

output Should be : This Is A Test String

That is what ever I give it to the
modify function it should return me the string formated with all leters caps for each first word.

Can anybody please help me .

[Sagar Rohankar]

Serch API for a method which takes a string and make it into lowercase OR uppercase !

[Monoj Roy]

I have done with it .It may can help others

 
 

public class Test {
 
/**
 * @param args
 */
public static void main(String[] args) {

String myTestString = "thiS is My expectesd String";
Test newtest = new Test();
StringBuffer st = newtest.initCap(myTestString);
System.out.println(st);
}
 
public StringBuffer initCap(String str) {


// TODO Auto-generated method stub
StringBuffer retBuff = new StringBuffer("") ;
String testString = str ;
String input = testString.toLowerCase();
String allWords [] = input.split(" ");

for (int i = 0; i < allWords.length; i++) {
if (allWords[i] == null)
break;
Character ch = new  Character(allWords[i].charAt(0));
String modified = ch.toString().toUpperCase().toString()+allWords[i];


StringBuffer strBuf = new StringBuffer(modified) ;
strBuf.deleteCharAt(1);
//System.out.println(strBuf.toString());
retBuff.append(strBuf.append(" ").toString());
}

return retBuff;

 

}


}
 

 

[Campbell Ritchie]

More of a beginner's question.

What you forget is that Strings are immutable; if you return the same String you started with you won't see any changes.
Agree that StringBuffer is a better way to alter Strings than using the String class' methods (actually you ought to be using StringBuilder). To get the return type to String all you have to do is

public String initCap(String str)
{
   . . .
   return retBuff.toString();
}

I think some of the method names were not very well chosen; initCap does nothing which could be called "init" nor "cap."

[Ulf Dittmer]

That's also what org.apache.commons.lang.WordUtils.capitalize does (after the string has been lowercased first).

I recommend to familiarize yourself with the Commons Lang library, particularly the various *Utils classes. They can be huge time savers.

As an aside, instead of

StringBuffer retBuff = new StringBuffer("")

it'd be better to use

StringBuffer retBuff = new StringBuffer(str.length())

There's no point in allocating a StringBuffer that is too small (and thus might need to be resized), since you already know how long the result is going to be.
[ August 01, 2008: Message edited by: Ulf Dittmer ]