String Replacement

Hi, I'm going to start to learn Java outside of college. Learning Java in making own programs etc. Not scholar programs.
But I have a problem in getting text back. What do I need to add to this text?

package ontsleuteling1;

public class Replace
{
public static String replacement(String args[])
{
String str="ryhhf,MleiDffkwstkGyyoFfwTloIyykFbols2.Pyykfm RsuLwGlzosksiFihlisdlyOfkSsiKswsiligGsfbsip.RsoItm mskLz978.245.823.456Gkfso,Gfivf";


str.replaceAll( "F","O" );
str.replaceAll( "f","o" );

str.replaceAll( "G","G" );
str.replaceAll( "g","g" );

str.replaceAll( "H","L" );
str.replaceAll( "h","l" );

str.replaceAll( "I","N" );
str.replaceAll( "i","n" );

str.replaceAll( "R","H" );
str.replaceAll( "r","h" );

str.replaceAll( "V","Z" );
str.replaceAll( "v","z" );

str.replaceAll( "Y","A" );
str.replaceAll( "y","a" );

return str;
// System.out.print(str); --> doesn't work, why not?


}

}

replaceAll method returns another string. So your code should look like

str=str.replaceAll( "F","O" );

okay, thanks. I replaced. Could you tell me why I can't put the System.out.println("str"); there?

You have a return statement before that, so the flow control will never reach to that line. You may put that print statement before return.

Console : Exception in thread "main" java.lang.NoSuchMethodError: main

Have you coded the main function in your class?

it works now :)

package ontsleuteling1;

public class Replace
{
public static void main(String args[])
{

String str="ryhhf,MleiDffkwstkGyyoFfwTloIyykFbols2.Pyykfm RsuLwGlzosksiFihlisdlyOfkSsiKswsiligGsfbsip.RsoItm mskLz978.245.823.456Gkfso,Gfivf";


str = str.replaceAll( "F","O" );
str = str.replaceAll( "f","o" );

str = str.replaceAll( "G","G" );
str = str.replaceAll( "g","g" );

str = str.replaceAll( "H","L" );
str = str.replaceAll( "h","l" );

str = str.replaceAll( "I","N" );
str = str.replaceAll( "i","n" );

str = str.replaceAll( "R","H" );
str = str.replaceAll( "r","h" );

str = str.replaceAll( "V","Z" );
str = str.replaceAll( "v","z" );

str = str.replaceAll( "Y","A" );
str = str.replaceAll( "y","a" );

System.out.println( str + "");


}

}

okay, I want to translate that sentence. But it doesn't work proper on this way.

Do you know how to add this in an array or something? I think that that must help.

Im not sure.