Swap two Strings without using temp/third variable - Java Interview Questions -9
Swap two Strings without using temp/third variable:
Algorithm:
1) Append second string to first string and
store in first string:
a = a + b
2) call the method substring(int beginindex, int endindex)
by passing beginindex as 0 and endindex as,
a.length() - b.length():
b = substring(0,a.length()-b.length());
3) call the method substring(int beginindex) by passing
b.length() as argument to store the value of initial
b string in a
a = substring(b.length());
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