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)''

|-

| 12 - 13 || Serial, Parallel, CMS, G1, ''Epsilon (E)'', ''ZGC (E)'', ''Shenandoah (E)''

| 9-10 || rowspan="8" | G1

|-

| 11 14 || Serial, Parallel, CMS G1, G1''Epsilon (E)'', ''ZGC (experimentalE)'', ''Shenandoah (E)''

|-

| 1215 -13 20 || Serial, Parallel, CMS, G1, ZGC''Epsilon (experimentalE)'', ZGC, Shenandoah (experimental)

|-

| 1421 - 22 || Serial, Parallel, G1, ZGC''Epsilon (experimentalE)'', ZGC, Shenandoah, ''GenZGC (experimentalE)''

|-

| 15-2023 || Serial, Parallel, G1, ''Epsilon (E)'', ZGC, Shenandoah, GenZGC (default ZGC)

|-

| 21-2224 || Serial, Parallel, G1, ZGC''Epsilon (E)'', Shenandoah, GenZGC, ''GenShen (experimentalE)''

|-

| 2325 || Serial, Parallel, G1, ZGC''Epsilon (E)'', Shenandoah, GenZGC, (default ZGC)GenShen

|-

| 24 colspan="3" || Serial,<small> Parallel,''(E)'' G1,= Shenandoah, GenZGC, GenShenandoah (''experimental)''</small>

|}