package JavaCoreTechMooc.fin;

/**

* Created by Edwin Xu on 5/8/2020 10:23 PM

*/

public class StringUpdate {

public static void main(String[] args) {

final int N = 100000;

long b = System.currentTimeMillis();

String res ="";

for (int i = 0; i < N; i++) {

res+=i;

}

long e = System.currentTimeMillis();

System.out.println(e-b); //4431

b = System.currentTimeMillis();

StringBuffer sb = new StringBuffer();

for (int i = 0; i < N; i++) {

sb.append(i);

}

e = System.currentTimeMillis();

System.out.println(e-b); //62

b = System.currentTimeMillis();

StringBuilder sbl = new StringBuilder();

for (int i = 0; i <N ; i++) {

sbl.append(i);

}

e = System.currentTimeMillis();

System.out.println(e-b); //3

}

}