\u9593\u9055\u3048\u3066\u307e\u305b\u3093\u3088\u306d\uff01<\/strong><\/font><\/p>\n

\u4eca\u3055\u3089\u3067\u3059\u304c\u3001\u3053\u308c\u3089\u306f Integer.valueOf() \u30e1\u30bd\u30c3\u30c9\u304c\u4f7f\u308f\u308c\u3066 -128 \u304b\u3089 127 \u307e\u3067\u306f IntegerCache \u30af\u30e9\u30b9\u3067\u3042\u3089\u304b\u3058\u3081\u7528\u610f\u3055\u308c\u3066\u3044\u308b\u3082\u306e\u304c\u4f7f\u308f\u308c\u308b\u3002<\/p>\n

\u5c0f\u3055\u306a\u89aa\u5207\u3001\u5927\u304d\u306a\u304a\u4e16\u8a71<\/strong><\/font>\u3068\u3044\u3046\u3084\u3064\u3067\u3059\uff01<\/p>\n

\u3067\u3082\u3001\u7528\u610f\u3057\u3066\u3042\u308b\u7269\u306f\u4f7f\u308f\u306a\u304f\u3066\u306f\u640d\u3067\u3059\u3088\u306d\u3002<\/p>\n

\u3058\u3083\u3042\u3001\u3069\u3046\u3057\u3066\u3082\u3063\u3068\u3044\u3063\u3071\u3044\u4f5c\u3063\u3066\u7528\u610f\u3057\u3066\u304a\u3044\u3066\u304f\u308c\u306a\u3044\u306e\uff1f\u3063\u3066\u8a00\u3046\u3042\u306a\u305f\u306b<\/p>\n

JVM \u306e\u5b9f\u884c\u6642\u5f15\u6570\u306b\u3088\u308b\u5236\u5fa1\u3082\u53ef\u80fd\u3067\u3059\u3002<\/p>\n

-Djava.lang.Integer.IntegerCache.high=128 \u3068\u8a2d\u5b9a\u3057\u3066\u5b9f\u884c\u3059\u308b\u3068\u5148\u307b\u3069\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u7d50\u679c\u306f<\/p>\n

\u3061\u306a\u307f\u306b IntegerCache \u306e\u6700\u5c0f\u5024\u306e\u8a2d\u5b9a\u65b9\u6cd5\u306f\u79c1\u306f\u77e5\u308a\u307e\u305b\u3093\u3002(;\u309c\u30ed\u309c)<\/p>\n

\u4ee5\u4e0a\u3001\u3088\u304f\u3042\u308b\u30cd\u30bf\u7d42\u4e86\u3067\u3059\u3002<\/p>\n

Hatena \u30bf\u30b0: Java<\/a><\/div>\n
<\/p>\n
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<\/p>\n
<\/p>\n
<\/p>\n
<\/font><\/strong> <\/p>\n
<\/font><\/strong><\/p>\n
\n $\u3053\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u3092\u306f\u3066\u306a\u30d6\u30c3\u30af\u30de\u30fc\u30af\u306b\u8ffd\u52a0$ <\/a><\/div>\n
$Facebook \u306b\u30b7\u30a7\u30a2$ <\/a><\/div>\n
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Tweet<\/a><\/div>\n <\/div>\n
\n","protected":false},"excerpt":{"rendered":"
\u6614\u304b\u3089\u3088\u304f\u3042\u308b Java \u30d1\u30ba\u30eb\u3067\u30d6\u30ed\u30b0\u306e\u66f4\u65b0\u3092\u4e45\u3057\u3076\u308a\u306b\u3057\u3066\u304a\u304d\u307e\u3059\u3002 \u6b21\u306e\u30b3\u30fc\u30c9\u306e\u7d50\u679c\u306f\u3069\u3046\u306a\u308b\u3067\u3057\u3087\u3046\uff1f package jp.yucchi.integercachedemo; public class IntegerCacheDemo { public static void main(String[] args) { Integer i = 127; Integer j = 127; System.out.println(i == j); Integer k = 128; Integer l = 128; System.out.println(k == l); Integer m =\u2026<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[17],"class_list":["post-2131","post","type-post","status-publish","format-standard","hentry","category-java","tag-java"],"_links":{"self":[{"href":"http:\/\/yucchi.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts\/2131","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/yucchi.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/yucchi.jp\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/yucchi.jp\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/yucchi.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2131"}],"version-history":[{"count":2,"href":"http:\/\/yucchi.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts\/2131\/revisions"}],"predecessor-version":[{"id":2134,"href":"http:\/\/yucchi.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts\/2131\/revisions\/2134"}],"wp:attachment":[{"href":"http:\/\/yucchi.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2131"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/yucchi.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2131"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/yucchi.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2131"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}