/* 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);
 
		nameChanged = 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()
}

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VGVzdAo=

Test