[Algo] 649. String Replace (basic)
Given an original string input, and two strings S and T, replace all occurrences of S in input with T.
Assumptions
- input, S and T are not null, S is not empty string
Examples
- input = "appledogapple", S = "apple", T = "cat", input becomes "catdogcat"
- input = "laicode", S = "code", T = "offer", input becomes "laioffer"
public class Solution { public String replace(String input, String source, String target) { // Write your solution here StringBuilder sb = new StringBuilder(); int start = 0; int match = input.indexOf(source, start); while (match != -1) { // append end index exclusive sb.append(input, start, match).append(target); start = match + source.length(); match = input.indexOf(source, start); } sb.append(input, start, input.length()); return sb.toString(); } }
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