Beginner Java: Replace method solved

Question

Hi all,
Having some issues in java, decided to take an intro to programming this semester
I want to use the replace method to replace multiple integers with characters,
public class ReplacementTester
public static void main(String[] args)
String greeting = "H3770, 371t3 hack3r!";
// your work here
// call the replace method four times
System.out.println(modifiedGreeting);
System.out.println("Expected: Hello, elite hacker!");
I think I need to use
String modifiedGreeting = greeting.replace("7", "l");
in there, which works, but I don't know how to continue it to put more replacements in it. I cant seem to use the same argument again like this, it seems to ignore the second line.
String modifiedGreeting = greeting.replace("7", "l");
String modifiedGreeting = greeting.replace("3", "e");
I know I gotta be missing something relatively simple,
Any ideas?
Last edited by proxima_centauri (2009-01-15 22:33:45)

Answer 1

You keep recreating the modifiedGreeting reference, so the previous String objects stored their (edit: there) get deleted. I haven't used Java in a long time, but assuming your description of the replace method is correct, the following should work:
public class ReplacementTester {
public static void main(String[] args) {
String greeting = "H3770, 371t3 hack3r!";
String modifiedGreeting = greeting.replace("7", "l");
modifiedGreeting = modifiedGreeting.replace("3", "e");
System.out.println(modifiedGreeting);
System.out.println("Expected: Hello, elite hacker!");
or to be more concise:
public class ReplacementTester {
public static void main(String[] args) {
String greeting = "H3770, 371t3 hack3r!";
String modifiedGreeting = greeting.replace("7", "l").replace("3", "e");
System.out.println(modifiedGreeting);
System.out.println("Expected: Hello, elite hacker!");
Last edited by dsr (2009-01-15 21:44:55)