Learning/Java/JavaOCA/StringBuilders.java at main · maikcosta/Learning · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
publicclassStringBuilders {
publicstaticvoidmain(String[] args) {

//Menos performatico.
longtempoInicial = System.currentTimeMillis();
Stringalpha = "a";

for (charcurrent = 'b'; current <= 'z';current ++){
alpha += current;
 }
System.out.println(alpha);
longtempoFinal = System.currentTimeMillis();
System.out.printf("%.3f ms%n", (tempoFinal - tempoInicial) / 1000d);


//Mais performatico.
longtempoInicial1 = System.currentTimeMillis();
StringBuildersb = newStringBuilder();
for (charcurrent = 'a'; current <= 'z'; current++){
sb.append(current);
 }
System.out.println(sb);
longtempoFinal1 = System.currentTimeMillis();
System.out.printf("%.3f ms%n", (tempoFinal1 - tempoInicial1) / 1000d);
 }
}