{"id":297123,"date":"2024-05-20T16:18:56","date_gmt":"2024-05-20T08:18:56","guid":{"rendered":""},"modified":"2024-05-20T16:19:03","modified_gmt":"2024-05-20T08:19:03","slug":"%e7%bc%96%e5%86%99java-%e6%97%b6%ef%bc%8c%e5%a6%82%e4%bd%95%e8%ae%be%e7%bd%ae%e5%a4%a7%e5%86%99%e9%94%ae","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/297123.html","title":{"rendered":"\u7f16\u5199java \u65f6\uff0c\u5982\u4f55\u8bbe\u7f6e\u5927\u5199\u952e"},"content":{"rendered":"

\"\u7f16\u5199java<\/p>\n

\u5728Java\u7f16\u7a0b\u4e2d\uff0c\u8c03\u6574\u5b57\u7b26\u7684\u5927\u5c0f\u5199\u901a\u5e38\u6d89\u53ca\u5230\u5b57\u7b26\u4e32\u5904\u7406\u3002\u82e5\u60a8\u7684\u76ee\u7684\u662f\u8bbe\u7f6e\u5927\u5199\u952e\uff0c\u53ef\u4ee5\u7406\u89e3\u4e3a\u9700\u8981\u5c06\u5b57\u7b26\u4e32\u4e2d\u7684\u5b57\u7b26\u5168\u90e8\u6216\u90e8\u5206\u8f6c\u6362\u4e3a\u5927\u5199\u3002\u5b9e\u73b0\u8fd9\u4e00\u529f\u80fd\uff0c\u6709\u51e0\u79cd\u5e38\u89c1\u7684\u65b9\u6cd5\uff0c\u5305\u542b\u4f46\u4e0d\u9650\u4e8e\u4f7f\u7528String\u7c7b\u7684toUpperCase()\u65b9\u6cd5\u3001\u4f7f\u7528Character\u7c7b\u7684toUpperCase(char c)\u65b9\u6cd5\u548c\u4f7f\u7528ASCII\u7801\u76f4\u63a5\u8f6c\u6362\u3002\u5176\u4e2d\uff0c\u4f7f\u7528String\u7c7b\u7684toUpperCase()\u65b9\u6cd5\u6700\u4e3a\u76f4\u63a5\u548c\u5e38\u7528\uff0c\u56e0\u4e3a\u5b83\u80fd\u591f\u76f4\u63a5\u5c06\u4e00\u4e2a\u5b57\u7b26\u4e32\u4e2d\u7684\u6240\u6709\u5b57\u7b26\u8f6c\u6362\u6210\u5927\u5199\u5f62\u5f0f<\/strong>\u3002\u8fd9\u79cd\u65b9\u6cd5\u4e0d\u4ec5\u9002\u7528\u6027\u597d\u3001\u6613\u4e8e\u5b9e\u73b0\uff0c\u800c\u4e14\u7531\u4e8e\u662fString\u7c7b\u7684\u5185\u7f6e\u65b9\u6cd5\uff0c\u56e0\u6b64\u5728\u8fdb\u884c\u5b57\u7b26\u4e32\u64cd\u4f5c\u65f6\u975e\u5e38\u9ad8\u6548\u548c\u76f4\u89c2\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u4f7f\u7528String\u7c7b\u7684toUpperCase()\u65b9\u6cd5<\/h3>\n<\/p>\n

String\u7c7b\u63d0\u4f9b\u7684toUpperCase()\u65b9\u6cd5\u662f\u5b9e\u73b0\u5927\u5199\u8f6c\u6362\u7684\u9996\u9009\u65b9\u6cd5<\/strong>\u3002\u8fd9\u4e2a\u65b9\u6cd5\u4e0d\u63a5\u53d7\u4efb\u4f55\u53c2\u6570\uff0c\u80fd\u591f\u8fd4\u56de\u5f53\u524d\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5927\u5199\u540e\u7684\u65b0\u5b57\u7b26\u4e32\uff0c\u539f\u5b57\u7b26\u4e32\u4e0d\u4f1a\u88ab\u4fee\u6539\u3002<\/p>\n<\/p>\n

public class UpperCaseExample {<\/p>\n
    public static void mAI<\/a>n(String[] args) {<\/p>\n
        String originalString = "Hello World!";<\/p>\n
        String upperCaseString = originalString.toUpperCase();<\/p>\n
        System.out.println("Original: " + originalString);<\/p>\n
        System.out.println("Upper Case: " + upperCaseString);<\/p>\n
    }<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0coriginalString\u662f\u539f\u59cb\u5b57\u7b26\u4e32\uff0c\u901a\u8fc7\u8c03\u7528toUpperCase()\u65b9\u6cd5\uff0c\u5c06\u8fd9\u4e2a\u5b57\u7b26\u4e32\u8f6c\u6362\u6210\u4e86\u5168\u5927\u5199\u7684\u5f62\u5f0f\uff0c\u5e76\u5b58\u50a8\u5728upperCaseString\u53d8\u91cf\u4e2d\u3002<\/p>\n<\/p>\n
\u4e8c\u3001\u4f7f\u7528Character\u7c7b\u7684toUpperCase(char c)\u65b9\u6cd5<\/h3>\n<\/p>\n
\u5f53\u9700\u8981\u5bf9\u5b57\u7b26\u4e32\u4e2d\u7684\u67d0\u4e2a\u7279\u5b9a\u5b57\u7b26\u8fdb\u884c\u5927\u5199\u8f6c\u6362\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528Character\u7c7b\u7684toUpperCase\u65b9\u6cd5\u3002\u8fd9\u4e2a\u65b9\u6cd5\u63a5\u53d7\u4e00\u4e2a\u5b57\u7b26\u4f5c\u4e3a\u53c2\u6570\u5e76\u8fd4\u56de\u5176\u5927\u5199\u5f62\u5f0f\uff0c\u5982\u679c\u8be5\u5b57\u7b26\u6ca1\u6709\u5927\u5199\u5f62\u5f0f\uff0c\u5219\u8fd4\u56de\u539f\u5b57\u7b26\u3002<\/p>\n<\/p>\n
public class CharacterToUpperExample {<\/p>\n
    public static void main(String[] args) {<\/p>\n
        char ch = 'a';<\/p>\n
        char upperCh = Character.toUpperCase(ch);<\/p>\n
        System.out.println("Original Character: " + ch);<\/p>\n
        System.out.println("Upper Case Character: " + upperCh);<\/p>\n
    }<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u4e2a\u4f8b\u5b50\u5c55\u793a\u4e86\u5982\u4f55\u5c06\u4e00\u4e2a\u5c0f\u5199\u5b57\u7b26'a'\u8f6c\u6362\u4e3a\u5b83\u7684\u5927\u5199\u5f62\u5f0f\u3002\u901a\u8fc7Character.toUpperCase(ch)\u83b7\u53d6\u5927\u5199\u5b57\u7b26\u3002<\/p>\n<\/p>\n
\u4e09\u3001\u4f7f\u7528ASCII\u7801\u76f4\u63a5\u8f6c\u6362<\/h3>\n<\/p>\n
\u5bf9\u4e8e\u7ecf\u9a8c\u8f83\u4e3a\u4e30\u5bcc\u7684\u5f00\u53d1\u8005\uff0c\u76f4\u63a5\u64cd\u4f5cASCII\u7801\u662f\u53e6\u4e00\u79cd\u5c06\u5b57\u7b26\u8f6c\u6362\u4e3a\u5927\u5199\u7684\u4f4e\u7ea7\u65b9\u6cd5\u3002\u5c0f\u5199\u5b57\u6bcd\u548c\u5927\u5199\u5b57\u6bcd\u5728ASCII\u8868\u4e2d\u6709\u56fa\u5b9a\u7684\u504f\u79fb\u91cf\uff0c\u901a\u8fc7\u5728\u4ee3\u7801\u4e2d\u52a0\u51cf\u8fd9\u4e2a\u504f\u79fb\u91cf\uff0c\u53ef\u4ee5\u5b9e\u73b0\u5927\u5c0f\u5199\u8f6c\u6362\u3002<\/p>\n<\/p>\n
public class AsciiToUpperExample {<\/p>\n
    public static void main(String[] args) {<\/p>\n
        char ch = 'g';<\/p>\n
        char upperCh = (char) (ch - 'a' + 'A');<\/p>\n
        System.out.println("Original Character: " + ch);<\/p>\n
        System.out.println("Upper Case Character: " + upperCh);<\/p>\n
    }<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u4e2a\u65b9\u6cd5\u76f4\u63a5\u5229\u7528\u4e86\u5c0f\u5199\u5b57\u7b26\u548c\u5927\u5199\u5b57\u7b26\u5728ASCII\u7801\u4e2d\u7684\u6570\u503c\u5173\u7cfb\u6765\u8fdb\u884c\u8f6c\u6362\uff0c\u4f46\u9700\u8981\u6ce8\u610f\u7684\u662f\u8fd9\u79cd\u65b9\u6cd5\u53ea\u9002\u7528\u4e8e\u82f1\u6587\u5b57\u6bcd\u3002<\/p>\n<\/p>\n
\u56db\u3001\u603b\u7ed3<\/h3>\n<\/p>\n
Java\u4e2d\u8bbe\u7f6e\u5927\u5199\u952e\uff0c\u4e3b\u8981\u662f\u901a\u8fc7\u5b57\u7b26\u4e32\u6216\u5b57\u7b26\u7684\u5927\u5c0f\u5199\u8f6c\u6362\u6765\u5b9e\u73b0\u7684\u3002String\u7c7b\u7684toUpperCase()\u65b9\u6cd5\u63d0\u4f9b\u4e86\u4e00\u79cd\u7b80\u4fbf\u7684\u5168\u5b57\u7b26\u4e32\u8f6c\u6362\u65b9\u5f0f\uff0c\u800cCharacter\u7c7b\u7684toUpperCase()\u65b9\u6cd5\u9002\u7528\u4e8e\u5355\u4e2a\u5b57\u7b26\u7684\u8f6c\u6362\u3002\u76f4\u63a5\u64cd\u4f5cASCII\u7801\u867d\u7136\u4e3a\u9ad8\u7ea7\u7528\u6237\u63d0\u4f9b\u4e86\u66f4\u5e95\u5c42\u7684\u64cd\u4f5c\u65b9\u5f0f\uff0c\u4f46\u5176\u5b9e\u9645\u5e94\u7528\u76f8\u5bf9\u8f83\u5c11\u3002\u4e3a\u4e86\u4fdd\u8bc1\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\uff0c\u63a8\u8350\u4f7f\u7528String\u7c7b\u6216Character\u7c7b\u63d0\u4f9b\u7684\u6807\u51c6\u65b9\u6cd5\u6765\u8fdb\u884c\u5927\u5c0f\u5199\u7684\u8f6c\u6362<\/strong>\u3002\u8fd9\u4e9b\u65b9\u6cd5\u4e0d\u4ec5\u63d0\u9ad8\u4e86\u4ee3\u7801\u7684\u5065\u58ee\u6027\uff0c\u4e5f\u4f7f\u5f97\u5b57\u7b26\u4e32\u64cd\u4f5c\u53d8\u5f97\u7b80\u5355\u548c\u76f4\u63a5\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
\u5982\u4f55\u5728Java\u4e2d\u8bbe\u7f6e\u5927\u5199\u952e\uff1f<\/strong><\/p>\n
    \n
  1. \n
    \u5982\u4f55\u5728Java\u4e2d\u68c0\u6d4b\u5927\u5199\u952e\u662f\u5426\u6309\u4e0b\uff1f<\/strong><\/p>\n
    \u5728Java\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528Toolkit<\/code>\u7c7b\u7684getDefaultToolkit()<\/code>\u65b9\u6cd5\u6765\u83b7\u53d6\u9ed8\u8ba4\u7684Toolkit<\/code>\u5bf9\u8c61\uff0c\u7136\u540e\u4f7f\u7528getLockingKeyState()<\/code>\u65b9\u6cd5\u6765\u68c0\u6d4b\u5927\u5199\u952e\u7684\u72b6\u6001\u3002\u8be5\u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u5e03\u5c14\u503c\uff0c\u5982\u679c\u5927\u5199\u952e\u88ab\u6309\u4e0b\uff0c\u5219\u8fd4\u56detrue<\/code>\uff0c\u5426\u5219\u8fd4\u56defalse<\/code>\u3002<\/p>\n
    import java.awt.*;\n\npublic class Main {\n    public static void main(String[] args) {\n        \/\/ \u83b7\u53d6\u9ed8\u8ba4\u7684Toolkit\u5bf9\u8c61\n        Toolkit toolkit = Toolkit.getDefaultToolkit();\n        \n        \/\/ \u68c0\u6d4b\u5927\u5199\u952e\u662f\u5426\u6309\u4e0b\n        boolean isCapsLockOn = toolkit.getLockingKeyState(KeyEvent.VK_CAPS_LOCK);\n        \n        \/\/ \u8f93\u51fa\u7ed3\u679c\n        if (isCapsLockOn) {\n            System.out.println("\u5927\u5199\u952e\u5df2\u6309\u4e0b");\n        } else {\n            System.out.println("\u5927\u5199\u952e\u672a\u6309\u4e0b");\n        }\n    }\n}\n<\/code><\/pre>\n<\/li>\n
  2. \n
    \u5982\u4f55\u5728Java\u4e2d\u8bbe\u7f6e\u5927\u5199\u952e\u7684\u72b6\u6001\uff1f<\/strong><\/p>\n
    \u5728Java\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528Robot<\/code>\u7c7b\u6765\u6a21\u62df\u952e\u76d8\u64cd\u4f5c\uff0c\u5e76\u901a\u8fc7\u8c03\u7528keyPress()<\/code>\u548ckeyRelease()<\/code>\u65b9\u6cd5\u6765\u8bbe\u7f6e\u5927\u5199\u952e\u7684\u72b6\u6001\u3002\u9996\u5148\uff0c\u9700\u8981\u521b\u5efa\u4e00\u4e2aRobot<\/code>\u5bf9\u8c61\uff0c\u7136\u540e\u8c03\u7528keyPress(KeyEvent.VK_CAPS_LOCK)<\/code>\u6765\u6309\u4e0b\u5927\u5199\u952e\uff0c\u518d\u8c03\u7528keyRelease(KeyEvent.VK_CAPS_LOCK)<\/code>\u6765\u91ca\u653e\u5927\u5199\u952e\u3002<\/p>\n
    import java.awt.*;\nimport java.awt.event.KeyEvent;\n\npublic class Main {\n    public static void main(String[] args) throws AWTException {\n        \/\/ \u521b\u5efa\u4e00\u4e2aRobot\u5bf9\u8c61\n        Robot robot = new Robot();\n        \n        \/\/ \u6309\u4e0b\u5927\u5199\u952e\n        robot.keyPress(KeyEvent.VK_CAPS_LOCK);\n        \n        \/\/ \u91ca\u653e\u5927\u5199\u952e\n        robot.keyRelease(KeyEvent.VK_CAPS_LOCK);\n    }\n}\n<\/code><\/pre>\n<\/li>\n
  3. \n
    \u5982\u4f55\u5728Java\u4e2d\u76d1\u542c\u5927\u5199\u952e\u7684\u72b6\u6001\u53d8\u5316\uff1f<\/strong><\/p>\n
    \u5728Java\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528KeyboardFocusManager<\/code>\u7c7b\u6765\u76d1\u542c\u952e\u76d8\u4e8b\u4ef6\uff0c\u4ece\u800c\u5b9e\u65f6\u83b7\u53d6\u5927\u5199\u952e\u7684\u72b6\u6001\u53d8\u5316\u3002\u9996\u5148\uff0c\u9700\u8981\u521b\u5efa\u4e00\u4e2aKeyboardFocusManager<\/code>\u5bf9\u8c61\uff0c\u5e76\u8c03\u7528addKeyEventDispatcher()<\/code>\u65b9\u6cd5\u6765\u6ce8\u518c\u4e00\u4e2aKeyEventDispatcher<\/code>\uff0c\u7136\u540e\u5728dispatchKeyEvent()<\/code>\u65b9\u6cd5\u4e2d\u68c0\u6d4b\u5927\u5199\u952e\u7684\u72b6\u6001\u3002<\/p>\n
    import java.awt.*;\nimport java.awt.event.KeyEvent;\n\npublic class Main {\n    public static void main(String[] args) {\n        \/\/ \u521b\u5efa\u4e00\u4e2aKeyboardFocusManager\u5bf9\u8c61\n        KeyboardFocusManager focusManager = KeyboardFocusManager.getCurrentKeyboardFocusManager();\n        \n        \/\/ \u6ce8\u518c\u4e00\u4e2aKeyEventDispatcher\n        focusManager.addKeyEventDispatcher(new KeyEventDispatcher() {\n            @Override\n            public boolean dispatchKeyEvent(KeyEvent e) {\n                \/\/ \u68c0\u6d4b\u5927\u5199\u952e\u662f\u5426\u6309\u4e0b\n                boolean isCapsLockOn = Toolkit.getDefaultToolkit().getLockingKeyState(KeyEvent.VK_CAPS_LOCK);\n                \n                \/\/ \u8f93\u51fa\u7ed3\u679c\n                if (isCapsLockOn) {\n                    System.out.println("\u5927\u5199\u952e\u5df2\u6309\u4e0b");\n                } else {\n                    System.out.println("\u5927\u5199\u952e\u672a\u6309\u4e0b");\n                }\n                \n                \/\/ \u8fd4\u56defalse\uff0c\u5c06\u4e8b\u4ef6\u5206\u53d1\u7ed9\u5176\u4ed6\u7684KeyEventDispatcher\n                return false;\n            }\n        });\n    }\n}\n<\/code><\/pre>\n<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"\u5728Java\u7f16\u7a0b\u4e2d\uff0c\u8c03\u6574\u5b57\u7b26\u7684\u5927\u5c0f\u5199\u901a\u5e38\u6d89\u53ca\u5230\u5b57\u7b26\u4e32\u5904\u7406\u3002\u82e5\u60a8\u7684\u76ee\u7684\u662f\u8bbe\u7f6e\u5927\u5199\u952e\uff0c\u53ef\u4ee5\u7406\u89e3\u4e3a\u9700\u8981\u5c06\u5b57\u7b26\u4e32\u4e2d\u7684\u5b57\u7b26 […]","protected":false},"author":3,"featured_media":297133,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/297123"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=297123"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/297123\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/297133"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=297123"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=297123"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=297123"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}