package vacc;
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.KeyStroke;
import javax.swing.filechooser.FileNameExtensionFilter;
public class TestNotepad {
private JFrame jframe;// 主窗体
JPanel jpanel;// 面板
JMenuBar jmenuBar = new JMenuBar();// 菜单面板
JMenu jmenuFile, jmenuEdit;// 主菜单
JMenuItem jmenuItemOpen, jmenuItemNew, jmenuItemSave, jmenuItemSaveAs,
jmenuItemExit;// 菜单中的子菜单
JTextArea jtextArea;// 文本框
JScrollPane jscrollPane;// 带滑动条的
JFileChooser jfileChooser;//文件选择器
File currentFile;
public TestNotepad() {
// TODO Auto-generated constructor stub
jframe = new JFrame("我的记事本");
jpanel = new JPanel();
jmenuBar = new JMenuBar();
jtextArea = new JTextArea();
jtextArea.setLineWrap(true);//设置自动换行
jscrollPane = new JScrollPane(jtextArea);
jfileChooser = new JFileChooser();
jfileChooser.setFileFilter(new FileNameExtensionFilter("文本文件(*.txt)", "txt"));
jmenuFile = new JMenu("文件(F)");
jmenuFile.setMnemonic('F');
jmenuEdit = new JMenu("编辑(E)");
jmenuEdit.setMnemonic('E');
jmenuItemNew = new JMenuItem("新建(N)", 'N');
jmenuItemNew.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N, InputEvent.CTRL_DOWN_MASK));
jmenuItemOpen = new JMenuItem("打开(O)", 'O');
jmenuItemOpen.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O, InputEvent.CTRL_DOWN_MASK));
jmenuItemOpen.addActionListener(new ActionListener() {
