How to swap two strings without using the third variable ?
How to swap two strings without using the third variable ?
How to swap two strings without using the third variable ?
Program
Before swapping....The first String = one
The second String = two
After swapping....
The first String = two
The second String = one
public class Main
{
public static void main(String[] args)
{
String s1 = "One";
String s2 = "Two";
// Print String before swapping
System.out.println("Strings before swap: s1 = " +s1 + " and s2 = "+s2);
// append 2nd string to 1st
s1 = s1 + s2;
// store initial string a in string b
s2 = s1.substring(0,s1.length()-s2.length());
// store initial string b in string a
s1 = s1.substring(s2.length());
// print String after swapping
System.out.println("Strings after swap: s1 = " + s1 + " and s2 = " + s2);
}
}
Output:
Strings before swap: s1 = One and s2 = Two
Strings after swap: s1 = Two and s2 = One
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