Lassen Sie eine Funktion einige Daten erfassen und zurücksenden ⇐ Java

[Guest]

Ich versuche, eine Java-Funktion dazu zu bringen, Eingaben entgegenzunehmen, sie zu ändern und zurückzusenden. Normalerweise müssten Sie varName zurückgeben; oder so, aber hier funktioniert es nicht. Meine Frage lautet: Wie kann ich eine benutzerdefinierte Methode erstellen, um eine Variable „nameRaw“ aufzunehmen und sie innerhalb der Funktion „nameChanger()“ zu ändern und dann den geänderten Namen in die Variable „nameChanged“ auszugeben?

Ich habe IDEONE.com verwendet, um den Code anzuzeigen und zu verarbeiten, daher ist hier der Link: http://ideone.com/cdj6Cd

Wenn Sie zufälligen Links nicht vertrauen, dann ist das so finden und völlig verständlich. Ich werde es also auch hier einfügen, gehe aber einfach davon aus, dass der Benutzer als Eingabe nur „Test“ eingegeben hat.

Code:

Code: Select all

/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
public static void main (String[] args) throws java.lang.Exception {
System.out.println("*INTENDED* Function of this-To create a custom method to take in a variable 'nameRaw' and change it within the function 'nameChanger()' then out put the changed name to variable: 'nameChanged'.\nProblem: the name changes within the function 'nameChanger()' only, therefore I cannot call the variable 'nameChanged' elsewhere, such as in main().........\n\n\n");
// Initalize the Java Scanner
Scanner in = new Scanner(System.in);

// Initalizes a completely empty string with name "nameChanged"
String nameChanged = null;

System.out.println("Please enter a username for yourself below:");
System.out.println("Test"); // Fake input to make me feel good I guess, it just looks better

// Sets "nameRaw" to "Test"
String nameRaw = in.nextLine();

// Spits out the untouched value that the user has entered
System.out.println("\nRaw name before passing to custom method: " + nameRaw);

// Puts "nameRaw" into the custom method "nameChanger()" to change the, "s" in, "Test" to a "z" by default
nameChanger(nameRaw, nameChanged);

// Spits out the touched and changed nameChanged variable from "nameChanger()"
if(nameChanged == null) {
System.out.println("\nHere is the failed changed name: " + nameChanged);
System.out.println("\nARE YOU KIDDING ME! WHY DOES THIS NOT WORK?!?! PLEASE HELP!!!!");
} else {
System.out.println("Here is the successfuly changed name: " + nameChanged);
System.out.println("\nWhoever solved this problem is a god..");
}

} // Closes method main()

// Custom method named "nameChanger" that will need a variable named "nameRaw" *which is set* within its () to function
private static String nameChanger(String nameRaw, String nameChanged) {

//// Initalizes a completely empty string with name "nameChanged"
//String nameChanged = null;

// States the set name *unchanged* from the main method on line 17
System.out.println("\t#\tName unchanged read and displayed by the nameChanger custom method: " + nameRaw);

// The name by default "Test" does contain an "s" so the if statement is satisfied
if(nameRaw.contains("s")) {

// The variable "nameRaw should be running through here and having it's "s" replaced with a "z"
nameChanged = nameRaw.replace("s", "z");

// Output the changed name *if all goes right*
System.out.println("\t#\tName changed *still in custom function* is: " + nameChanged);

// The else statement is just for testing purposes, such as changing "Test" as the input to "Demo" to dis-satisfy the if statemtent
} else {
System.out.println("\t#\tFor reference, here is the unchanged name raw: " + nameRaw);
System.out.println("\t#\tAlso for reference, here is the null value 'nameChanged': " + nameChanged);
}

// One more time to show my hate toward Java, output the changed variable "nameChanged".  Take note that the "s" is a "z".....
System.out.println("\t#\tPlease don't be null or have an 's' in it: " + nameChanged);

// To output to main() that nameChanged is now not null *if all goes right*, but "Tezt" should be the output
return nameChanged;
} // Close custom method, nameChanger()
}

Danke Leute, ich hoffe, das überfordert euch nicht zu sehr :p,
Aaron