{"id":25377,"date":"2024-06-16T08:57:34","date_gmt":"2024-06-15T23:57:34","guid":{"rendered":"http:\/\/www.tyosuke20xx.com\/blog\/?p=25377"},"modified":"2024-06-16T08:57:36","modified_gmt":"2024-06-15T23:57:36","slug":"java-%e3%83%a1%e3%83%a2%e5%b8%b3","status":"publish","type":"post","link":"http:\/\/www.tyosuke20xx.com\/blog\/?p=25377","title":{"rendered":"Java \u30e1\u30e2\u5e33"},"content":{"rendered":"\n<pre class=\"wp-block-code\"><code>import javax.swing.*;\nimport java.awt.*;\nimport java.awt.event.ActionEvent;\nimport java.awt.event.ActionListener;\nimport java.io.BufferedReader;\nimport java.io.FileReader;\nimport java.io.FileWriter;\nimport java.io.IOException;\n\npublic class SimpleNotepad extends JFrame implements ActionListener {\n    private JTextArea textArea;\n    private JMenuItem openItem, saveItem, exitItem;\n\n    public SimpleNotepad() {\n        \/\/ Frame settings\n        setTitle(\"Simple Notepad\");\n        setSize(800, 600);\n        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);\n\n        \/\/ Text area settings\n        textArea = new JTextArea();\n        JScrollPane scrollPane = new JScrollPane(textArea);\n        add(scrollPane, BorderLayout.CENTER);\n\n        \/\/ Menu bar creation\n        JMenuBar menuBar = new JMenuBar();\n        JMenu fileMenu = new JMenu(\"File\");\n        openItem = new JMenuItem(\"Open\");\n        saveItem = new JMenuItem(\"Save\");\n        exitItem = new JMenuItem(\"Exit\");\n\n        openItem.addActionListener(this);\n        saveItem.addActionListener(this);\n        exitItem.addActionListener(this);\n\n        fileMenu.add(openItem);\n        fileMenu.add(saveItem);\n        fileMenu.add(exitItem);\n        menuBar.add(fileMenu);\n        setJMenuBar(menuBar);\n    }\n\n    @Override\n    public void actionPerformed(ActionEvent e) {\n        if (e.getSource() == openItem) {\n            openFile();\n        } else if (e.getSource() == saveItem) {\n            saveFile();\n        } else if (e.getSource() == exitItem) {\n            System.exit(0);\n        }\n    }\n\n    private void openFile() {\n        JFileChooser fileChooser = new JFileChooser();\n        int option = fileChooser.showOpenDialog(this);\n        if (option == JFileChooser.APPROVE_OPTION) {\n            try (BufferedReader reader = new BufferedReader(new FileReader(fileChooser.getSelectedFile()))) {\n                textArea.read(reader, null);\n            } catch (IOException ex) {\n                JOptionPane.showMessageDialog(this, \"File could not be opened\", \"Error\", JOptionPane.ERROR_MESSAGE);\n            }\n        }\n    }\n\n    private void saveFile() {\n        JFileChooser fileChooser = new JFileChooser();\n        int option = fileChooser.showSaveDialog(this);\n        if (option == JFileChooser.APPROVE_OPTION) {\n            try (FileWriter writer = new FileWriter(fileChooser.getSelectedFile())) {\n                textArea.write(writer);\n            } catch (IOException ex) {\n                JOptionPane.showMessageDialog(this, \"File could not be saved\", \"Error\", JOptionPane.ERROR_MESSAGE);\n            }\n        }\n    }\n\n    public static void main(String&#91;] args) {\n        SwingUtilities.invokeLater(() -> {\n            SimpleNotepad notepad = new SimpleNotepad();\n            notepad.setVisible(true);\n        });\n    }\n}\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[76,4],"tags":[75,3],"class_list":["post-25377","post","type-post","status-publish","format-standard","hentry","category-java","category-programming","tag-java","tag-programming"],"aioseo_notices":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"http:\/\/www.tyosuke20xx.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/25377","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.tyosuke20xx.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.tyosuke20xx.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.tyosuke20xx.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.tyosuke20xx.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=25377"}],"version-history":[{"count":1,"href":"http:\/\/www.tyosuke20xx.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/25377\/revisions"}],"predecessor-version":[{"id":25378,"href":"http:\/\/www.tyosuke20xx.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/25377\/revisions\/25378"}],"wp:attachment":[{"href":"http:\/\/www.tyosuke20xx.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=25377"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.tyosuke20xx.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=25377"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.tyosuke20xx.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=25377"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}