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@Test | |
public void testString(){ | |
System.out.println("--------------------Operador + -----------------------------"); | |
String textoOperador = ""; | |
Date date = new Date(System.currentTimeMillis()); | |
DateFormat formatter = new SimpleDateFormat("HH:mm:ss:SSS"); | |
String initOperador = formatter.format(date); | |
System.out.println(initOperador); | |
for(int i = 0; i < 100000; i++){ | |
textoOperador = textoOperador + "text" + i + "text"; | |
} | |
date = new Date(System.currentTimeMillis()); | |
String fimOperador = formatter.format(date); | |
System.out.println(fimOperador); | |
BigDecimal a = new BigDecimal(initOperador.replaceAll(":", "")); | |
BigDecimal b = new BigDecimal(fimOperador.replaceAll(":", "")); | |
System.out.println("tempo : " + b.subtract(a) ); | |
System.out.println("-------------------String Format----------------------------"); | |
String textoFormat = ""; | |
date = new Date(System.currentTimeMillis()); | |
String initFormat = formatter.format(date); | |
System.out.println(initFormat); | |
for(int i = 0; i < 100000; i++){ | |
textoFormat = String.format("%s text %s text", textoFormat, i); | |
} | |
date = new Date(System.currentTimeMillis()); | |
String fimFormat = formatter.format(date); | |
System.out.println(fimFormat); | |
BigDecimal c = new BigDecimal(initFormat.replaceAll(":", "")); | |
BigDecimal d = new BigDecimal(fimFormat.replaceAll(":", "")); | |
System.out.println(String.format("tempo : %s", d.subtract(c)) ); | |
System.out.println("-------------------String concat----------------------------"); | |
String textoConcat = ""; | |
date = new Date(System.currentTimeMillis()); | |
String initConcat = formatter.format(date); | |
System.out.println(initConcat); | |
for(int i = 0; i < 100000; i++){ | |
textoConcat = new String().concat(textoConcat).concat("text").concat(String.valueOf(i)).concat("text"); | |
} | |
date = new Date(System.currentTimeMillis()); | |
String fimConcat = formatter.format(date); | |
System.out.println(fimConcat); | |
BigDecimal e = new BigDecimal(initConcat.replaceAll(":", "")); | |
BigDecimal f = new BigDecimal(fimConcat.replaceAll(":", "")); | |
System.out.println(new String("tempo : ").concat(f.subtract(e).toPlainString())); | |
System.out.println("-------------------String Builder---------------------------"); | |
StringBuilder textoBuilder = new StringBuilder(); | |
date = new Date(System.currentTimeMillis()); | |
String initStringBuilder = formatter.format(date); | |
System.out.println(initStringBuilder); | |
for(int i = 0; i < 100000; i++){ | |
textoBuilder = textoBuilder.append(String.valueOf(i)).append("text"); | |
} | |
date = new Date(System.currentTimeMillis()); | |
String fimStringBuilder = formatter.format(date); | |
System.out.println(fimStringBuilder); | |
BigDecimal g = new BigDecimal(initStringBuilder.replaceAll(":", "")); | |
BigDecimal h = new BigDecimal(fimStringBuilder.replaceAll(":", "")); | |
System.out.println(new StringBuilder("tempo : ").append(h.subtract(g))); | |
System.out.println("-------------------String Buffer---------------------------"); | |
StringBuffer textoBuffer = new StringBuffer(); | |
date = new Date(System.currentTimeMillis()); | |
String initStringBuffer = formatter.format(date); | |
System.out.println(initStringBuffer); | |
for(int i = 0; i < 100000; i++){ | |
textoBuffer = textoBuffer.append("text").append(String.valueOf(i)).append("text"); | |
} | |
date = new Date(System.currentTimeMillis()); | |
String fimStringBuffer = formatter.format(date); | |
System.out.println(fimStringBuffer); | |
BigDecimal i = new BigDecimal(initStringBuffer.replaceAll(":", "")); | |
BigDecimal j = new BigDecimal(fimStringBuffer.replaceAll(":", "")); | |
System.out.println(new StringBuffer("tempo: ").append(j.subtract(i)) ); | |
} | |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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--------------------Operador + ----------------------------- | |
16:57:38:651 | |
16:58:41:453 | |
tempo : 102802 | |
-------------------String Format---------------------------- | |
16:58:41:455 | |
17:00:45:106 | |
tempo : 4203651 | |
-------------------String concat---------------------------- | |
17:00:45:106 | |
17:02:30:415 | |
tempo : 185309 | |
-------------------String Builder--------------------------- | |
17:02:30:416 | |
17:02:30:444 | |
tempo : 28 | |
-------------------String Buffer--------------------------- | |
17:02:30:444 | |
17:02:30:483 | |
tempo: 39 |
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