{"id":14579,"date":"2024-03-15T22:31:52","date_gmt":"2024-03-15T13:31:52","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%ae%e3%83%ad%e3%82%b0%e3%82%a4%e3%83%b3%e7%94%bb%e9%9d%a2%e3%81%a7%e3%81%ae%e3%83%aa%e3%83%80%e3%82%a4%e3%83%ac%e3%82%af%e3%83%88%e3%81%ae%e5%ae%9f%e8%a3%85%e6%96%b9%e6%b3%95%e3%81%af\/"},"modified":"2025-08-05T22:33:01","modified_gmt":"2025-08-05T13:33:01","slug":"java%e3%81%ae%e3%83%ad%e3%82%b0%e3%82%a4%e3%83%b3%e7%94%bb%e9%9d%a2%e3%81%a7%e3%81%ae%e3%83%aa%e3%83%80%e3%82%a4%e3%83%ac%e3%82%af%e3%83%88%e3%81%ae%e5%ae%9f%e8%a3%85%e6%96%b9%e6%b3%95%e3%81%af","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%ae%e3%83%ad%e3%82%b0%e3%82%a4%e3%83%b3%e7%94%bb%e9%9d%a2%e3%81%a7%e3%81%ae%e3%83%aa%e3%83%80%e3%82%a4%e3%83%ac%e3%82%af%e3%83%88%e3%81%ae%e5%ae%9f%e8%a3%85%e6%96%b9%e6%b3%95%e3%81%af\/","title":{"rendered":"Java\u306e\u30ed\u30b0\u30a4\u30f3\u753b\u9762\u3067\u306e\u30ea\u30c0\u30a4\u30ec\u30af\u30c8\u306e\u5b9f\u88c5\u65b9\u6cd5\u306f\u3069\u3046\u3067\u3059\u304b\u3002"},"content":{"rendered":"<p>Java\u306e\u30ed\u30b0\u30a4\u30f3\u753b\u9762\u306e\u9077\u79fb\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306b\u3001Swing\u306eJFrame\u3068JPanel\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u7c21\u5358\u306a\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u3059\uff1a<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">import<\/span> javax.swing.*;\r\n<span class=\"hljs-keyword\">import<\/span> java.awt.*;\r\n<span class=\"hljs-keyword\">import<\/span> java.awt.event.ActionEvent;\r\n<span class=\"hljs-keyword\">import<\/span> java.awt.event.ActionListener;\r\n\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">LoginFrame<\/span> <span class=\"hljs-keyword\">extends<\/span> <span class=\"hljs-title class_\">JFrame<\/span> {\r\n\r\n    <span class=\"hljs-keyword\">private<\/span> JPanel loginPanel;\r\n    <span class=\"hljs-keyword\">private<\/span> JPanel homePanel;\r\n\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-title function_\">LoginFrame<\/span><span class=\"hljs-params\">()<\/span> {\r\n        <span class=\"hljs-comment\">\/\/ \u8bbe\u7f6e\u7a97\u53e3\u6807\u9898<\/span>\r\n        <span class=\"hljs-built_in\">super<\/span>(<span class=\"hljs-string\">\"\u767b\u5f55\u754c\u9762\"<\/span>);\r\n\r\n        <span class=\"hljs-comment\">\/\/ \u521b\u5efa\u767b\u5f55\u9762\u677f<\/span>\r\n        loginPanel = <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">JPanel<\/span>();\r\n        loginPanel.setLayout(<span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">FlowLayout<\/span>());\r\n\r\n        <span class=\"hljs-comment\">\/\/ \u521b\u5efa\u7528\u6237\u540d\u548c\u5bc6\u7801\u8f93\u5165\u6846<\/span>\r\n        <span class=\"hljs-type\">JTextField<\/span> <span class=\"hljs-variable\">usernameField<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">JTextField<\/span>(<span class=\"hljs-number\">20<\/span>);\r\n        <span class=\"hljs-type\">JPasswordField<\/span> <span class=\"hljs-variable\">passwordField<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">JPasswordField<\/span>(<span class=\"hljs-number\">20<\/span>);\r\n        <span class=\"hljs-type\">JButton<\/span> <span class=\"hljs-variable\">loginButton<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">JButton<\/span>(<span class=\"hljs-string\">\"\u767b\u5f55\"<\/span>);\r\n\r\n        <span class=\"hljs-comment\">\/\/ \u6dfb\u52a0\u767b\u5f55\u6309\u94ae\u7684\u70b9\u51fb\u4e8b\u4ef6\u76d1\u542c\u5668<\/span>\r\n        loginButton.addActionListener(<span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">ActionListener<\/span>() {\r\n            <span class=\"hljs-meta\">@Override<\/span>\r\n            <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title function_\">actionPerformed<\/span><span class=\"hljs-params\">(ActionEvent e)<\/span> {\r\n                <span class=\"hljs-comment\">\/\/ \u6a21\u62df\u767b\u5f55\u6210\u529f<\/span>\r\n                <span class=\"hljs-type\">boolean<\/span> <span class=\"hljs-variable\">loginSuccess<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-literal\">true<\/span>;\r\n\r\n                <span class=\"hljs-keyword\">if<\/span> (loginSuccess) {\r\n                    <span class=\"hljs-comment\">\/\/ \u521b\u5efa\u9996\u9875\u9762\u677f<\/span>\r\n                    homePanel = <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">JPanel<\/span>();\r\n                    homePanel.setLayout(<span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">FlowLayout<\/span>());\r\n\r\n                    <span class=\"hljs-comment\">\/\/ \u521b\u5efa\u6b22\u8fce\u6807\u7b7e<\/span>\r\n                    <span class=\"hljs-type\">JLabel<\/span> <span class=\"hljs-variable\">welcomeLabel<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">JLabel<\/span>(<span class=\"hljs-string\">\"\u6b22\u8fce\u767b\u5f55\uff01\"<\/span>);\r\n                    homePanel.add(welcomeLabel);\r\n\r\n                    <span class=\"hljs-comment\">\/\/ \u79fb\u9664\u767b\u5f55\u9762\u677f\uff0c\u6dfb\u52a0\u9996\u9875\u9762\u677f<\/span>\r\n                    remove(loginPanel);\r\n                    add(homePanel);\r\n                    revalidate();  <span class=\"hljs-comment\">\/\/ \u91cd\u65b0\u5e03\u5c40<\/span>\r\n                    repaint();  <span class=\"hljs-comment\">\/\/ \u91cd\u7ed8\u754c\u9762<\/span>\r\n                } <span class=\"hljs-keyword\">else<\/span> {\r\n                    JOptionPane.showMessageDialog(<span class=\"hljs-literal\">null<\/span>, <span class=\"hljs-string\">\"\u767b\u5f55\u5931\u8d25\uff01\"<\/span>, <span class=\"hljs-string\">\"\u63d0\u793a\"<\/span>, JOptionPane.ERROR_MESSAGE);\r\n                }\r\n            }\r\n        });\r\n\r\n        <span class=\"hljs-comment\">\/\/ \u5c06\u7528\u6237\u540d\u3001\u5bc6\u7801\u8f93\u5165\u6846\u548c\u767b\u5f55\u6309\u94ae\u6dfb\u52a0\u5230\u767b\u5f55\u9762\u677f<\/span>\r\n        loginPanel.add(<span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">JLabel<\/span>(<span class=\"hljs-string\">\"\u7528\u6237\u540d:\"<\/span>));\r\n        loginPanel.add(usernameField);\r\n        loginPanel.add(<span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">JLabel<\/span>(<span class=\"hljs-string\">\"\u5bc6\u7801:\"<\/span>));\r\n        loginPanel.add(passwordField);\r\n        loginPanel.add(loginButton);\r\n\r\n        <span class=\"hljs-comment\">\/\/ \u5c06\u767b\u5f55\u9762\u677f\u6dfb\u52a0\u5230\u7a97\u53e3<\/span>\r\n        add(loginPanel);\r\n\r\n        <span class=\"hljs-comment\">\/\/ \u8bbe\u7f6e\u7a97\u53e3\u5927\u5c0f\u548c\u5173\u95ed\u64cd\u4f5c<\/span>\r\n        setSize(<span class=\"hljs-number\">300<\/span>, <span class=\"hljs-number\">200<\/span>);\r\n        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);\r\n        setVisible(<span class=\"hljs-literal\">true<\/span>);\r\n    }\r\n\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title function_\">main<\/span><span class=\"hljs-params\">(String[] args)<\/span> {\r\n        <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">LoginFrame<\/span>();\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>\u3053\u306e\u4f8b\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001LoginFrame\u30af\u30e9\u30b9\u304cJFrame\u3092\u7d99\u627f\u3057\u3066\u304a\u308a\u3001\u30ed\u30b0\u30a4\u30f3\u753b\u9762\u30a6\u30a3\u30f3\u30c9\u30a6\u5168\u4f53\u3092\u8868\u3057\u3066\u3044\u307e\u3059\u3002\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u5185\u3067\u3001\u307e\u305a\u30ed\u30b0\u30a4\u30f3\u30d1\u30cd\u30ebloginPanel\u3092\u4f5c\u6210\u3057\u3001\u30e6\u30fc\u30b6\u30fc\u540d\u3001\u30d1\u30b9\u30ef\u30fc\u30c9\u5165\u529b\u6b04\u3001\u30ed\u30b0\u30a4\u30f3\u30dc\u30bf\u30f3\u3092\u8a2d\u5b9a\u3057\u3001\u30ed\u30b0\u30a4\u30f3\u30dc\u30bf\u30f3\u306b\u30af\u30ea\u30c3\u30af\u30a4\u30d9\u30f3\u30c8\u30ea\u30b9\u30ca\u30fc\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002\u30ed\u30b0\u30a4\u30f3\u30dc\u30bf\u30f3\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068\u3001\u30ed\u30b0\u30a4\u30f3\u304c\u6210\u529f\u3057\u305f\u5834\u5408\u306f\u30db\u30fc\u30e0\u30d1\u30cd\u30ebhomePanel\u3092\u4f5c\u6210\u3057\u3001remove()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u30ed\u30b0\u30a4\u30f3\u30d1\u30cd\u30eb\u3092\u524a\u9664\u3057\u3001add()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u30db\u30fc\u30e0\u30d1\u30cd\u30eb\u3092\u30a6\u30a3\u30f3\u30c9\u30a6\u306b\u8ffd\u52a0\u3057\u3001\u6700\u5f8c\u306brevalidate()\u3068repaint()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u518d\u914d\u7f6e\u304a\u3088\u3073\u518d\u63cf\u753b\u3057\u307e\u3059\u3002<\/p>\n<p>main() \u30e1\u30bd\u30c3\u30c9\u3067\u3001LoginFrame \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u4f5c\u6210\u3055\u308c\u3001\u30ed\u30b0\u30a4\u30f3\u753b\u9762\u30a6\u30a3\u30f3\u30c9\u30a6\u304c\u958b\u59cb\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n<p>\u4ed6\u306e\u30da\u30fc\u30b8\u306b\u9077\u79fb\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u5bfe\u5fdc\u3059\u308b\u30d1\u30cd\u30eb\u3092\u4f5c\u6210\u3057\u3001remove()\u3068add()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u30d1\u30cd\u30eb\u3092\u5207\u308a\u66ff\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u306e\u30ed\u30b0\u30a4\u30f3\u753b\u9762\u306e\u9077\u79fb\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306b\u3001Swing\u306eJFrame\u3068JPanel\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u7c21\u5358\u306a\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u3059\uff1a import javax.swing.*; import java.awt. 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