Manually parsed by hand

hexdump -C Test.class

00000000 |ca fe ba be|00 00|00 3b |00 0d|0a.00 02.00 03|07. |.......;........|
00000010  00 04|0c.00 05.00 06|01 .00 10.6a 61 76 61 2f 6c  |..........java/l|
00000020  61 6e 67 2f 4f 62 6a 65  63 74|01.00 06.3c 69 6e  |ang/Object...<in|
00000030  69 74 3e|01.00 03.28 29  56|07.00 08|01.00 04.54  |it>...()V......T|
00000040  65 73 74|01.00 04.43 6f  64 65|01.00 0f.4c 69 6e  |est...Code...Lin|
00000050  65 4e 75 6d 62 65 72 54  61 62 6c 65|01.00 0a.53  |eNumberTable...S|
00000060  6f 75 72 63 65 46 69 6c  65|01.00 09.54 65 73 74  |ourceFile...Test|
00000070  2e 6a 61 76 61|00 21|00  07|00 02|00 00|00 00|00  |.java.!.........|
00000080  01|00 01.00 05.00 06.00  01:00 09.00 00 00 1d.00  |................|
00000090  01.00 01.00 00 00 05.2a  b7 00 01 b1.00 00.00 01: |.......*........|
000000a0  00 0a.00 00 00 06.00 01 :00 00.00 01|00 01|00 0b. |................|
000000b0  00 00 00 02.00 0c                                 |......|
000000b6


Magic: ca fe ba be
Minor: 00 00
Major: 00 3b
CpCount: 00 0d (13) (13 - 1 = 12)
Cp: [
    1: {
        tag: 0a (10, MethodRef)
        class_index: 00 02 (2)
        name_and_type_index: 00 03
    }
    2: {
        tag: 07 (7, Class)
        name_index: 00 04 (4) (java/lang/Object)
    }
    3: {
        tag: 0c (12, NameAndType)
        name_index: 00 05 (05)
        descriptor_index: 00 06
    }
    4: {
        tag: 01 (1, Utf8)
        length: 00 10 (16)
        string: 6a 61 76 61 2f 6c 61 6e 67 2f 4f 62 6a 65 63 74 (java/lang/Object)
    }
    5: {
        tag: 01 (1, Utf8)
        length: 00 06 (6)
        string: 3c 69 6e 69 74 3e (<init>)
    }
    6: {
        tag: 01 (1, Utf8)
        length: 00 03 (3)
        bytes: 28 29 56 (()V)
    }
    7: {
        tag: 07 (7, Class)
        name_index: 00 08 (8) (Test)
    }
    8: {
        tag: 01 (1, Utf8)
        length: 00 04 (4)
        bytes: 54 65 73 74 (Test)
    }
    9: {
        tag: 01 (1, Utf8)
        length: 00 04 (4)
        bytes: 43 6f 64 65 (Code)
    }
    10: {
        tag: 01 (1, Utf8)
        length: 00 0f (15)
        bytes: 4c 69 6e 65 4e 75 6d 62 65 72 54 61 62 6c 65 (LineNumberTable)
    }
    11: {
        tag: 01 (1, Utf8)
        length: 00 0a (10)
        bytes: 53 6f 75 72 63 65 46 69 6c 65 (SourceFile)
    }
    12: {
        tag: 01 (1, Utf8)
        length: 00 09 (9)
        bytes: 54 65 73 74 2e 6a 61 76 61 (Test.java)
    }
]
access_flags: 00 21
this_class: 00 07 (Test)
super_class: 00 02 (java/lang/Object)
interfaces_count: 00 00
interfaces: []
fields_count: 00 00
fields: []
methods_count: 00 01
methods: [
    {
        access_flags: 00 01
        name_index: 00 05
        descriptor_index: 00 06
        attributes_count: 00 01
        attributes: [
            {
                name_index: 00 09 (Code)
                attribute_length: 00 00 00 1d (29)
                max_stack: 00 01
                max_locals: 00 01
                code_length: 00 00 00 05
                code: 2a b7 00 01 b1
                exception_table_length: 00 00
                exception_table: []
                attributes_count: 00 01
                attributes: [
                    {
                        attribute_name_index: 00 0a (LineNumberTable)
                        attribute_length: 00 00 00 06
                        line_number_table_length: 00 01
                        line_number_table: [
                            {
                                start_pc: 00 00
                                line_number: 00 01
                            }
                        ]
                    }
                ]
            }
        ]
    }
]
attributes_count: 00 01
attributes: [
    {
        attribute_name_index: 00 0b (SourceFile)
        attribute_length: 00 00 00 02
        sourcefile_index: 00 0c
    }
]