Caching mechanism of Java Integer Auto-boxing

See Code validation

/*** Integer caching mechanism * The following caches are only useful when auto-boxing (Autobox). New object is useless*/ Public classIntegertypecache { Public Static voidMain (string[] args) {/*** Run log when greater than 127, the Autobox reference is judged to be false*/         for(inti = 0; I < 200; i++) {            /*** Integer Cache Test * * Caches Default-128 to 127, range may be modified by-xx:autoboxcachemax=size */Integer Integer1=NewInteger (i); Integer Integer2=NewInteger (i); Integer Integer3=i; Integer Integer4=i; BooleanRESULT1 = Integer1 = =Integer2; BooleanRESULT2 = Integer3 = =integer4; System.out.println ("Integer1" + integer1 + "= integer2" + integer2 + "result is" +RESULT1); System.out.println ("Integer3" + integer3 + "= integer4" + integer4 + "result is" +result2); /*** Long Cache Test * Cache range from-128 to 127*/Long long1=NewLong (i); Long long2=NewLong (i); Integer Long3=i; Integer Long4=i; BooleanRESULT3 = Long1 = =long2; BooleanRESULT4 = Long3 = =Long4; System.out.println ("Long1" + long1 + "= long2" + long2 + "result is" +RESULT3); System.out.println ("Long3" + long3 + "= Long4" + Long4 + "result is" +RESULT4); /***short Cache Test * Caches range from 128 to 127*/Short Short1=NewShort (( Short) (i); Short Short2=NewShort (( Short) (i); Short Short3= ( Short) I; Short Short4= ( Short) I; BooleanRESULT5 = Short1 = =Short2; BooleanResult6 = Short3 = =Short4; System.out.println ("Short1" + short1 + "= short2" + short2 + "result is" +RESULT5); System.out.println ("Short3" + short3 + "= short4" + short4 + "result is" +result6);        System.out.println (); }        /*** Character Cache size is Unicode 0-127*/Character Character1=NewCharacter (' 1 ');//UnicodeCharacter character2 = ' 1 '; Character Character3= ' 1 '; System.out.println ("Character1 = = Character2" + (Character1 = = Character2));//falseSystem.out.println ("Character3 = = character4" + (Character2 = = Character3));//trueCharacter character4=NewCharacter (' big ');//unicode>127Character Character7 =NewCharacter (' big ')); Character Character5= ' big '; Character Character6= ' big '; System.out.println ("Character4 = = Character5" + (character4 = = Character5));//falseSystem.out.println ("Character5 = = Character6" + (Character5 = = Character6));//falseSystem.out.println ("character4 = = Character7" + (character4 = = Character7));//false        /*** Byte Cache size is 128 to 127 * Autobox Reference comparison is all true*/         for(bytei = Byte.min_value; i < Byte.max_value; i++) {Byte byte1=NewByte (i); Byte Byte2=NewByte (i); Byte Byte3=i; Byte byte4=i; System.out.println ("Byte1" + byte1 + "= = Byte2" + Byte2 + "is" + (byte1 = Byte2));//falseSystem.out.println ("Byte3" + byte3 + "= = Byte4" + byte4 + "is" + (Byte3 = = byte4));//trueSystem.out.println (); }    }}

Caching mechanism of Java Integer Auto-boxing