Java virtual machine: Difference between revisions

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{{Blockquote|[[Sun Microsystems|We]] intend that this specification should sufficiently document the Java Virtual Machine to make possible compatible clean-room implementations. Oracle provides tests that verify the proper operation of implementations of the Java Virtual Machine.}}
 
The most commonly used Java virtual machine is Oracle's [[HotSpot (virtual machine)|HotSpot]].
One of Oracle's JVMs is named HotSpot; the other, inherited from [[BEA Systems]], is [[JRockit]]. Oracle owns the Java trademark and may allow its use to certify implementation suites as fully compatible with Oracle's specification.
 
One of Oracle's JVMs is named HotSpot; the other, inherited from [[BEA Systems]], is [[JRockit]]. Oracle owns the Java trademark and may allow its use to certify implementation suites as fully compatible with Oracle's specification.
 
===Garbage collectors===
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! Version !! Default GC !! Available GCs
|-
| 8 || Parallel6u14 || rowspan="2" | Serial /<br />Parallel ([[Multiprocessor system architecture|MP]]) || Serial, Parallel, [[Concurrent mark sweep collector|CMS]], ''[[Garbage-first collector|G1]] (E)''
|-
| 97u4 -10 8 || rowspan="82" | Serial, Parallel, CMS, G1
|-
| 9 - 10 || rowspan="9" | G1
|-
| 11 || Serial, Parallel, CMS, G1, ''Epsilon (E)'', ''ZGC (E)''
| 9-10 || rowspan="8" | G1
|-
| 1112 - 13 || Serial, Parallel, CMS, G1, ''Epsilon (E)'', ''ZGC (E)'', ''EpsilonShenandoah (E)''
|-
| 12-1314 || Serial, Parallel, CMS, G1, ''ZGCEpsilon (E)'', ''EpsilonZGC (E)'', ''Shenandoah (E)''
|-
| 1415 - 20 || Serial, Parallel, G1, ''ZGCEpsilon (E)'', ''Epsilon (E)''ZGC, ''Shenandoah (E)''
|-
| 1521 -20 22 || Serial, Parallel, G1, ZGC, ''Epsilon (E)'', ZGC, Shenandoah, ''GenZGC (E)''
|-
| 21-2223 || Serial, Parallel, G1, ZGC, ''Epsilon (E)'', ZGC, Shenandoah, ''GenZGC (Edefault ZGC)''
|-
| 2324 || Serial, Parallel, G1, ZGC, ''Epsilon (E)'', Shenandoah, GenZGC, (default''GenShen ZGC(E)''
|-
| 2425 || Serial, Parallel, G1, ''Epsilon (E)'', Shenandoah, GenZGC, ''GenShenandoah (E)''GenShen
|-
| colspan="3" | <small> ''(E)'' = ''experimental''</small>
|}