Java Question
Return string in Java does nothing in compiler
first time poster and Java newbie. I am working on practice code to skill up. The problem I am running into is that return new_string; does not return any value to my compiler.
My goal is to reverse a string from "def" to "fed."
In this example (below), the value of new_string is not returned. Literally, the console appears blank.
public class ReverseString {
public String reverse(String input) {
String new_string = "";
int iterator = 0;
int length = input.length();
while(iterator < length){
char string_input = input.charAt(iterator);
new_string = string_input + new_string;
iterator ++;
}
return new_string;
}
public static void main(String[] args){
ReverseString test = new ReverseString();
test.reverse("def");
}
}
However, when I change my code to do a system print, I get the correct result "fed."
public class ReverseString {
public void reverse(String input) {
String new_string = "";
int iterator = 0;
int length = input.length();
while(iterator < length){
char string_input = input.charAt(iterator);
new_string = string_input + new_string;
iterator ++;
}
System.out.println(new_string);
}
public static void main(String[] args){
ReverseString test = new ReverseString();
test.reverse("def");
}
}
Any help would be much appreciated. Searched everywhere for an answer but could not figure this out!
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Answer Source
You probably wanted something like this? Return a string variable. Print it out.
public class ReverseString {
public String reverse(String input) {
String new_string = "";
int iterator = 0;
int length = input.length();
while(iterator < length){
char string_input = input.charAt(iterator);
new_string = string_input + new_string;
iterator ++;
}
return new_string;
}
public static void main(String[] args){
ReverseString test = new ReverseString();
System.out.println(test.reverse("def"));
}
}
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