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Stringbuilder inside loop efficiency?

原文 2017-06-08 01:00:32 4 1 java

Consider using something like

StringBuilder sb = new StringBuilder();
for(int i = 0; i < n; i++){
  sb.append('a');
}

Is the efficiency of the code O(N^2) or O(N) ?

1 answers

它是O（N），这意味着要花n变量多大的代价。

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