[java] Java에서 메소드 실행 시간을 어떻게 설정합니까?

가능한 모든 방법을 한 곳에 모았습니다.

데이트

Date startDate = Calendar.getInstance().getTime();
long d_StartTime = new Date().getTime();
Thread.sleep(1000 * 4);
Date endDate = Calendar.getInstance().getTime();
long d_endTime = new Date().getTime();
System.out.format("StartDate : %s, EndDate : %s \n", startDate, endDate);
System.out.format("Milli = %s, ( D_Start : %s, D_End : %s ) \n", (d_endTime - d_StartTime),d_StartTime, d_endTime);

체계. currentTimeMillis ()

long startTime = System.currentTimeMillis();
Thread.sleep(1000 * 4);
long endTime = System.currentTimeMillis();
long duration = (endTime - startTime);  
System.out.format("Milli = %s, ( S_Start : %s, S_End : %s ) \n", duration, startTime, endTime );
System.out.println("Human-Readable format : "+millisToShortDHMS( duration ) );

인간이 읽을 수있는 형식

public static String millisToShortDHMS(long duration) {
    String res = "";    // java.util.concurrent.TimeUnit;
    long days       = TimeUnit.MILLISECONDS.toDays(duration);
    long hours      = TimeUnit.MILLISECONDS.toHours(duration) -
                      TimeUnit.DAYS.toHours(TimeUnit.MILLISECONDS.toDays(duration));
    long minutes    = TimeUnit.MILLISECONDS.toMinutes(duration) -
                      TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS.toHours(duration));
    long seconds    = TimeUnit.MILLISECONDS.toSeconds(duration) -
                      TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(duration));
    long millis     = TimeUnit.MILLISECONDS.toMillis(duration) -
                      TimeUnit.SECONDS.toMillis(TimeUnit.MILLISECONDS.toSeconds(duration));

    if (days == 0)      res = String.format("%02d:%02d:%02d.%04d", hours, minutes, seconds, millis);
    else                res = String.format("%dd %02d:%02d:%02d.%04d", days, hours, minutes, seconds, millis);
    return res;
}

구아바 : 구글 스톱워치 ^JAR « 스톱워치 의 목적은 경과 시간을 나노초 단위로 측정하는 것입니다.

com.google.common.base.Stopwatch g_SW = Stopwatch.createUnstarted();
g_SW.start();
Thread.sleep(1000 * 4);
g_SW.stop();
System.out.println("Google StopWatch  : "+g_SW);

Apache Commons Lang ^JAR
« StopWatch 는 타이밍에 편리한 API를 제공합니다.

org.apache.commons.lang3.time.StopWatch sw = new StopWatch();
sw.start();
Thread.sleep(1000 * 4);
sw.stop();
System.out.println("Apache StopWatch  : "+ millisToShortDHMS(sw.getTime()) );

요다 시간

public static void jodaTime() throws InterruptedException, ParseException{
    java.text.SimpleDateFormat ms_SDF = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss.SSS");
    String start = ms_SDF.format( new Date() ); // java.util.Date

    Thread.sleep(10000);

    String end = ms_SDF.format( new Date() );
    System.out.println("Start:"+start+"\t Stop:"+end);

    Date date_1 = ms_SDF.parse(start);
    Date date_2 = ms_SDF.parse(end);
    Interval interval = new org.joda.time.Interval( date_1.getTime(), date_2.getTime() );
    Period period = interval.toPeriod(); //org.joda.time.Period

    System.out.format("%dY/%dM/%dD, %02d:%02d:%02d.%04d \n",
        period.getYears(), period.getMonths(), period.getDays(),
        period.getHours(), period.getMinutes(), period.getSeconds(), period.getMillis());
}

Java 8의 Java 날짜 시간 API « Duration 객체는 두 Instant 객체 사이의 시간을 나타냅니다 .

Instant start = java.time.Instant.now();
    Thread.sleep(1000);
Instant end = java.time.Instant.now();
Duration between = java.time.Duration.between(start, end);
System.out.println( between ); // PT1.001S
System.out.format("%dD, %02d:%02d:%02d.%04d \n", between.toDays(),
        between.toHours(), between.toMinutes(), between.getSeconds(), between.toMillis()); // 0D, 00:00:01.1001 

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Spring Framework 는Java에서 경과 시간을 측정하기 위해 StopWatch 유틸리티 클래스를제공합니다.

StopWatch sw = new org.springframework.util.StopWatch();
sw.start("Method-1"); // Start a named task
    Thread.sleep(500);
sw.stop();

sw.start("Method-2");
    Thread.sleep(300);
sw.stop();

sw.start("Method-3");
    Thread.sleep(200);
sw.stop();

System.out.println("Total time in milliseconds for all tasks :\n"+sw.getTotalTimeMillis());
System.out.println("Table describing all tasks performed :\n"+sw.prettyPrint());

System.out.format("Time taken by the last task : [%s]:[%d]",
        sw.getLastTaskName(),sw.getLastTaskTimeMillis());

System.out.println("\n Array of the data for tasks performed « Task Name: Time Taken");
TaskInfo[] listofTasks = sw.getTaskInfo();
for (TaskInfo task : listofTasks) {
    System.out.format("[%s]:[%d]\n",
            task.getTaskName(), task.getTimeMillis());
}

산출:

Total time in milliseconds for all tasks :
999
Table describing all tasks performed :
StopWatch '': running time (millis) = 999
-----------------------------------------
ms     %     Task name
-----------------------------------------
00500  050%  Method-1
00299  030%  Method-2
00200  020%  Method-3

Time taken by the last task : [Method-3]:[200]
 Array of the data for tasks performed « Task Name: Time Taken
[Method-1]:[500]
[Method-2]:[299]
[Method-3]:[200]

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답변