How to swap two values in visualforce page

Question

In this visualforce page there are two inputs and one button. How to swap the values in given two inputs from input-1 to input-2 and input-2 to input-1. Please provide suggestions

I tried the above code

VF code:-

<apex:page controller="Swap_Values">
<apex:form >
<apex:outputLabel >Enter Value</apex:outputLabel>
<apex:inputText value="{!x}"/>
<apex:inputText value="{!y}"/>
<apex:commandButton value="Swap" action="{!SV}"/>
</apex:form>
</apex:page>

Apex code:-

public class Swap_Values {

    public String y { get; set; }

    public String x { get; set; }

    public PageReference SV() {
        x=y;
        y=x;
        return null;
    }

}

Please provide suggestions to do this swap functionality

Answer 1

Once you do x=y; you're overwriting the value stored into x, so its previous value is lost, then y=x; just store into y its own value.
In order to swap values, you must save the value into a temporary variable:

String tmp = x;
x = y;
y = tmp;