简介
简单的文本编译器,可以通过弹出对话框打开文件,进行编写并保存文件。
代码
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package Code.a; import java.io.*; import javax.swing.*; import java.awt.event.*; public class Editor implements ActionListener{ JFrame f; JTextArea ta; JScrollPane sp; JMenuBar menubar; JMenu menu; JMenuItem openItem,saveItem,closeItem,exitItem; FileReader fr; FileWriter fw; JFileChooser fc; File file; //构造界面,本类作为监听类; public Editor(){ f = new JFrame( "简易文本编辑器" ); ta = new JTextArea(); sp = new JScrollPane(ta); //滚轮 f.add(sp); menubar = new JMenuBar(); //菜单栏 menu = new JMenu( "File" ); openItem = new JMenuItem( "Open" ); //四个选项 saveItem = new JMenuItem( "Save" ); closeItem = new JMenuItem( "Close" ); exitItem = new JMenuItem( "Exit" ); menu.add(openItem); menu.add(saveItem); menu.add(closeItem); menu.add(exitItem); menubar.add(menu); f.setJMenuBar(menubar); f.setSize( 400 , 300 ); f.setVisible( true ); //四个选项事件函数; openItem.addActionListener( this ); saveItem.addActionListener( this ); closeItem.addActionListener( this ); exitItem.addActionListener( this ); } public void actionPerformed(ActionEvent e) { //异常 try { //点击打开选项时,弹出打开文件对话框; if (e.getActionCommand()== "Open" ) { fc = new JFileChooser(); if (fc.showOpenDialog( null ) == JFileChooser.APPROVE_OPTION) { file = fc.getSelectedFile(); fr = new FileReader(file); int c; while ((c = fr.read()) != - 1 ) { ta.append(String.valueOf(( char ) c)); } fr.close(); } } //点击保存选项时,弹出保存文件对话框; else if (e.getActionCommand()== "Save" ) { String str = ta.getText(); fc = new JFileChooser(); if (fc.showSaveDialog( null ) == JFileChooser.APPROVE_OPTION) { file = fc.getSelectedFile(); fw = new FileWriter(file); fw.write(str); fw.close(); } } //点击关闭选项时,清空文本框; else if (e.getActionCommand() == "Close" ) { ta.setText( "" ); } //点击退出选项时,退出当前界面; else if (e.getActionCommand() == "Exit" ) { System.exit( 0 ); } } //处理异常; catch (IOException exp) { exp.printStackTrace(); } } public static void main(String[] args) { Editor e = new Editor(); } } |
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/qq_43533435/article/details/109562114