http://openjdk.java.net/projects/code-tools/jmh/jmh-core/: The jmh is a Java harness for building, running, and analysing nano/micro/macro benchmarks written in Java and other languages targeting the JVM. (Oracle)
  • Aleksey Shipilev (Oracle/Sun, Red Hat)
  • Sergey Kuksenko (Oracle/Sun)
  • Anders Astrand (Oracle/BEA)
  • Staffan Friberg (Oracle/BEA)
  • Henrik Loef (Oracle/BEA) 
public class org.openjdk.jmh.util.Version
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.openjdk.jmh.util.Version
  super_class: java.lang.Object
{
  private static final int UPDATE_INTERVAL;
    descriptor: I
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 180

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.openjdk.jmh.util.Version this
         0: .line 38
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // org.openjdk.jmh.util.Version this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/openjdk/jmh/util/Version;

  public static java.lang.String getVersion();
    descriptor: ()Ljava/lang/String;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=3, locals=2, args_size=0
         0: .line 46
            new java.io.StringWriter
            dup
            invokespecial java.io.StringWriter.<init>:()V
            astore 0 /* sw */
        start local 0 // java.io.StringWriter sw
         1: .line 47
            new java.io.PrintWriter
            dup
            aload 0 /* sw */
            invokespecial java.io.PrintWriter.<init>:(Ljava/io/Writer;)V
            astore 1 /* pw */
        start local 1 // java.io.PrintWriter pw
         2: .line 49
            aload 1 /* pw */
            invokestatic org.openjdk.jmh.util.Version.printVersion:(Ljava/io/PrintWriter;)V
         3: .line 50
            aload 1 /* pw */
            invokevirtual java.io.PrintWriter.close:()V
         4: .line 51
            aload 0 /* sw */
            invokevirtual java.io.StringWriter.toString:()Ljava/lang/String;
            areturn
        end local 1 // java.io.PrintWriter pw
        end local 0 // java.io.StringWriter sw
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            1    5     0    sw  Ljava/io/StringWriter;
            2    5     1    pw  Ljava/io/PrintWriter;

  public static java.lang.String getPlainVersion();
    descriptor: ()Ljava/lang/String;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=2, locals=3, args_size=0
         0: .line 58
            new java.util.Properties
            dup
            invokespecial java.util.Properties.<init>:()V
            astore 0 /* p */
        start local 0 // java.util.Properties p
         1: .line 59
            ldc Lorg/openjdk/jmh/util/Version;
            ldc "/jmh.properties"
            invokevirtual java.lang.Class.getResourceAsStream:(Ljava/lang/String;)Ljava/io/InputStream;
            astore 1 /* s */
        start local 1 // java.io.InputStream s
         2: .line 60
            aload 1 /* s */
            ifnonnull 4
         3: .line 61
            ldc "-"
            areturn
         4: .line 64
      StackMap locals: java.util.Properties java.io.InputStream
      StackMap stack:
            aload 0 /* p */
            aload 1 /* s */
            invokevirtual java.util.Properties.load:(Ljava/io/InputStream;)V
         5: .line 65
            goto 12
      StackMap locals:
      StackMap stack: java.io.IOException
         6: pop
         7: .line 68
            aload 1 /* s */
            invokestatic org.openjdk.jmh.util.FileUtils.safelyClose:(Ljava/io/Closeable;)V
         8: .line 66
            ldc "-"
            areturn
         9: .line 67
      StackMap locals:
      StackMap stack: java.lang.Throwable
            astore 2
        10: .line 68
            aload 1 /* s */
            invokestatic org.openjdk.jmh.util.FileUtils.safelyClose:(Ljava/io/Closeable;)V
        11: .line 69
            aload 2
            athrow
        12: .line 68
      StackMap locals:
      StackMap stack:
            aload 1 /* s */
            invokestatic org.openjdk.jmh.util.FileUtils.safelyClose:(Ljava/io/Closeable;)V
        13: .line 70
            aload 0 /* p */
            ldc "jmh.version"
            invokevirtual java.util.Properties.get:(Ljava/lang/Object;)Ljava/lang/Object;
            checkcast java.lang.String
            astore 2 /* version */
        start local 2 // java.lang.String version
        14: .line 71
            aload 2 /* version */
            ifnonnull 16
        15: .line 72
            ldc "-"
            areturn
        16: .line 74
      StackMap locals: java.lang.String
      StackMap stack:
            aload 2 /* version */
            areturn
        end local 2 // java.lang.String version
        end local 1 // java.io.InputStream s
        end local 0 // java.util.Properties p
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            1   17     0        p  Ljava/util/Properties;
            2   17     1        s  Ljava/io/InputStream;
           14   17     2  version  Ljava/lang/String;
      Exception table:
        from    to  target  type
           4     5       6  Class java.io.IOException
           4     7       9  any

  private static void printVersion(java.io.PrintWriter);
    descriptor: (Ljava/io/PrintWriter;)V
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=7, locals=8, args_size=1
        start local 0 // java.io.PrintWriter pw
         0: .line 78
            new java.util.Properties
            dup
            invokespecial java.util.Properties.<init>:()V
            astore 1 /* p */
        start local 1 // java.util.Properties p
         1: .line 79
            ldc Lorg/openjdk/jmh/util/Version;
            ldc "/jmh.properties"
            invokevirtual java.lang.Class.getResourceAsStream:(Ljava/lang/String;)Ljava/io/InputStream;
            astore 2 /* s */
        start local 2 // java.io.InputStream s
         2: .line 81
            aload 2 /* s */
            ifnonnull 5
         3: .line 82
            aload 0 /* pw */
            ldc "Cannot figure out JMH version, no jmh.properties"
            invokevirtual java.io.PrintWriter.print:(Ljava/lang/String;)V
         4: .line 83
            return
         5: .line 87
      StackMap locals: java.util.Properties java.io.InputStream
      StackMap stack:
            aload 1 /* p */
            aload 2 /* s */
            invokevirtual java.util.Properties.load:(Ljava/io/InputStream;)V
         6: .line 88
            goto 14
      StackMap locals:
      StackMap stack: java.io.IOException
         7: pop
         8: .line 89
            aload 0 /* pw */
            ldc "Cannot figure out JMH version"
            invokevirtual java.io.PrintWriter.print:(Ljava/lang/String;)V
         9: .line 92
            aload 2 /* s */
            invokestatic org.openjdk.jmh.util.FileUtils.safelyClose:(Ljava/io/Closeable;)V
        10: .line 90
            return
        11: .line 91
      StackMap locals:
      StackMap stack: java.lang.Throwable
            astore 3
        12: .line 92
            aload 2 /* s */
            invokestatic org.openjdk.jmh.util.FileUtils.safelyClose:(Ljava/io/Closeable;)V
        13: .line 93
            aload 3
            athrow
        14: .line 92
      StackMap locals:
      StackMap stack:
            aload 2 /* s */
            invokestatic org.openjdk.jmh.util.FileUtils.safelyClose:(Ljava/io/Closeable;)V
        15: .line 95
            aload 1 /* p */
            ldc "jmh.version"
            invokevirtual java.util.Properties.get:(Ljava/lang/Object;)Ljava/lang/Object;
            checkcast java.lang.String
            astore 3 /* version */
        start local 3 // java.lang.String version
        16: .line 96
            aload 3 /* version */
            ifnonnull 19
        17: .line 97
            aload 0 /* pw */
            ldc "Cannot read jmh.version"
            invokevirtual java.io.PrintWriter.print:(Ljava/lang/String;)V
        18: .line 98
            return
        19: .line 101
      StackMap locals: java.lang.String
      StackMap stack:
            aload 0 /* pw */
            new java.lang.StringBuilder
            dup
            ldc "JMH "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 3 /* version */
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            ldc " "
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokevirtual java.io.PrintWriter.print:(Ljava/lang/String;)V
        20: .line 103
            aload 1 /* p */
            ldc "jmh.buildDate"
            invokevirtual java.util.Properties.get:(Ljava/lang/Object;)Ljava/lang/Object;
            checkcast java.lang.String
            astore 4 /* time */
        start local 4 // java.lang.String time
        21: .line 104
            aload 4 /* time */
            ifnonnull 24
        22: .line 105
            aload 0 /* pw */
            ldc "(cannot read jmh.buildDate)"
            invokevirtual java.io.PrintWriter.print:(Ljava/lang/String;)V
        23: .line 106
            return
        24: .line 109
      StackMap locals: java.lang.String
      StackMap stack:
            aload 0 /* pw */
            ldc "(released "
            invokevirtual java.io.PrintWriter.print:(Ljava/lang/String;)V
        25: .line 111
            new java.text.SimpleDateFormat
            dup
            ldc "yyyy/MM/dd"
            getstatic java.util.Locale.ROOT:Ljava/util/Locale;
            invokespecial java.text.SimpleDateFormat.<init>:(Ljava/lang/String;Ljava/util/Locale;)V
            aload 4 /* time */
            invokevirtual java.text.SimpleDateFormat.parse:(Ljava/lang/String;)Ljava/util/Date;
            astore 5 /* parse */
        start local 5 // java.util.Date parse
        26: .line 112
            invokestatic java.lang.System.currentTimeMillis:()J
            aload 5 /* parse */
            invokevirtual java.util.Date.getTime:()J
            lsub
            getstatic java.util.concurrent.TimeUnit.DAYS:Ljava/util/concurrent/TimeUnit;
            lconst_1
            invokevirtual java.util.concurrent.TimeUnit.toMillis:(J)J
            ldiv
            lstore 6 /* diff */
        start local 6 // long diff
        27: .line 113
            lload 6 /* diff */
            lconst_0
            lcmp
            ifle 32
        28: .line 114
            aload 0 /* pw */
            ldc "%d days ago"
            iconst_1
            anewarray java.lang.Object
            dup
            iconst_0
            lload 6 /* diff */
            invokestatic java.lang.Long.valueOf:(J)Ljava/lang/Long;
            aastore
            invokestatic java.lang.String.format:(Ljava/lang/String;[Ljava/lang/Object;)Ljava/lang/String;
            invokevirtual java.io.PrintWriter.print:(Ljava/lang/String;)V
        29: .line 115
            lload 6 /* diff */
            ldc 180
            lcmp
            ifle 36
        30: .line 116
            aload 0 /* pw */
            ldc ", please consider updating!"
            invokevirtual java.io.PrintWriter.print:(Ljava/lang/String;)V
        31: .line 118
            goto 36
        32: .line 119
      StackMap locals: java.util.Date long
      StackMap stack:
            aload 0 /* pw */
            ldc "today"
            invokevirtual java.io.PrintWriter.print:(Ljava/lang/String;)V
        end local 6 // long diff
        end local 5 // java.util.Date parse
        33: .line 121
            goto 36
      StackMap locals: java.io.PrintWriter java.util.Properties java.io.InputStream java.lang.String java.lang.String
      StackMap stack: java.text.ParseException
        34: pop
        35: .line 122
            aload 0 /* pw */
            aload 4 /* time */
            invokevirtual java.io.PrintWriter.print:(Ljava/lang/String;)V
        36: .line 124
      StackMap locals:
      StackMap stack:
            aload 0 /* pw */
            ldc ")"
            invokevirtual java.io.PrintWriter.print:(Ljava/lang/String;)V
        37: .line 125
            return
        end local 4 // java.lang.String time
        end local 3 // java.lang.String version
        end local 2 // java.io.InputStream s
        end local 1 // java.util.Properties p
        end local 0 // java.io.PrintWriter pw
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0   38     0       pw  Ljava/io/PrintWriter;
            1   38     1        p  Ljava/util/Properties;
            2   38     2        s  Ljava/io/InputStream;
           16   38     3  version  Ljava/lang/String;
           21   38     4     time  Ljava/lang/String;
           26   33     5    parse  Ljava/util/Date;
           27   33     6     diff  J
      Exception table:
        from    to  target  type
           5     6       7  Class java.io.IOException
           5     9      11  any
          25    33      34  Class java.text.ParseException
    MethodParameters:
      Name  Flags
      pw    
}
SourceFile: "Version.java"