Replacing "PING" with "PONG" in string.

Googie85

I am a newb to processing and have migrated from LiveCode. Just a quick question, not asking for a spoonfeed, just a general idea I should be looking at. The string contains PING and I am trying to replace it with PONG.

Many Thanks Guys!!

Matt.

TechWiz777

Hey there. Well first you have to set your indicator. When do you want the string to change from Ping To Pong? Afterwards, say it's after a mousePressed. Then you would just do this:

String PingOrPong = " ";

void setup(){
size(100,100);
}

void draw(){
PingOrPong = "Ping";
if(mousePressed){
PingOrPong = "Pong";
}
println(PingOrPong);
}

Or if you want to permanently change it to Pong after mouse clicked....

String PingOrPong = " ";

void setup(){
size(100,100);
PingOrPong = "Ping";
}

void draw(){
println(PingOrPong);
}

void mouseReleased(){
PingOrPong = "Pong"; 
}

Or if you want to make it happen after a certain amount of time:

String PingOrPong = " ";

void setup(){
size(100,100);
PingOrPong = "Ping";
}

void draw(){
println(PingOrPong);
if(millis()>=3000){
  PingOrPong = "Pong";
}
}

after 3 seconds in this case.

So basically its all about resetting the initial value of your String variable. Hope it helps!

~TW7 :D

Googie85

Thanks for your reply!! I meant to say that PING is among the characters of a string and i am trying to replace it in the string with PONG.

Many Thanks,

Matthew.

GoToLoop

http://docs.Oracle.com/javase/8/docs/api/java/lang/String.html#replace-java.lang.CharSequence-java.lang.CharSequence-

fuzzySi

use str.indexOf("Ping") to find where "Ping" starts, then concatenate a new string from the bits before, the word Pong & the bits after.

    String PingOrPong = "helloPinghello ";
    int place = PingOrPong.indexOf("Ping");
    String newString = PingOrPong.substring(0, place);
    newString += "Pong";
    newString += PingOrPong.substring(place + 4, PingOrPong.length());;
    println(PingOrPong);
    println(newString);

TechWiz777

Oh, hey there yes, the replies that were given are both what you're looking for, PingOrPong.indexOf is what you need. Sorry about missing the point, but i'm glad it got fixed.

fuzzySi

Thanks GoToLoop, that's much easier.

    String PingOrPong = "helloPinghello ";    
    String newerString = PingOrPong.replace("Ping", "Pong");
    println(newerString);

koogs

replace() will only do the first. replaceAll() will do all instances, should that be what you need.

koogs

String PingOrPong

Java naming conventions would use pingOrPong here. Classes start with an uppercase letter, members with a lowercase letter

GoToLoop

replace() will only do the first.

Alas! Please read the link before stating that: L-)
http://docs.Oracle.com/javase/8/docs/api/java/lang/String.html#replace-java.lang.CharSequence-java.lang.CharSequence-

Replaces each substring of this string that matches the literal target sequence with the specified literal replacement sequence. The replacement proceeds from the beginning of the string to the end, for example, replacing "aa" with "b" in the string "aaa" will result in "ba" rather than "ab".