String連結に使ったソースコード

StrPlus.java

public class StrPlus {

    public static void main(String[] args) {
        int roopCount = 100000;
        String word = "a";

        usePlus(10000, word);

        long start = System.currentTimeMillis();
        usePlus(roopCount, word);
        long end = System.currentTimeMillis();

        System.out.println((end - start));

    }


    private static void usePlus(int roopCount, String word) {
        String resultStr = "";

        for (int count= 0; count < roopCount; count++) {
            resultStr = resultStr + word;
        }
    }

}