java insertseparator_java编写记事本

末蓝、 2022-11-03 11:13 201阅读 0赞

al = new ArrayList();

private int set = 0;

private JFrame jf = new JFrame("Notepad");

private JTextArea jta = new JTextArea(20,40);

JScrollPane jsp = new JScrollPane(jta);

private JTextField jtf = new JTextField(10);

private JTextField jtft = new JTextField(10);

private JPopupMenu pp = new JPopupMenu();

private String target = null;

private JDialog jd = new JDialog(jf, "警告");

public void actionPerformed(ActionEvent e) \{

String comm = e.getActionCommand();

if (comm.equals("新建...")) \{

if(!jta.getText().equals(""))\{

jd.setLocation(300, 300);

jd.setVisible(true);

\}else\{

jta.setText("1234548882");

if(comm.equals("否"))\{

jta.setText("");

jd.dispose();

if(comm.equals("取消"))\{

jd.dispose();

if (comm.equals("保存") || comm.equals("另存...")||comm.equals("是")) \{

if(comm.equals("是")) jd.dispose();

FileDialog fd = new FileDialog(jf, "打开...", FileDialog.SAVE);

fd.setFilenameFilter(new FilenameFilter() \{

public boolean accept(File dir, String name) \{

return name.endsWith(".txt") || name.endsWith(".java");

\});

if (target == null || "另存...".equals(comm)) \{

fd.setVisible(true);

if (fd.getFile() != null) \{

target = fd.getFile();

try \{

FileOutputStream fos = new FileOutputStream(fd

.getDirectory()

\+ target);

byte\[\] b = jta.getText().getBytes();

for (byte by : b) \{

fos.write(by);

fos.close();

\} catch (IOException e1) \{

e1.printStackTrace();

if (comm.equals("打开...")) \{

al.add(jta.getText());

FileDialog fd = new FileDialog(jf, "打开...", FileDialog.LOAD);

fd.setFilenameFilter(new FilenameFilter() \{

public boolean accept(File dir, String name) \{

return name.endsWith(".txt") || name.endsWith(".java");

\});

fd.setVisible(true);

// 以下是打开文件

target = fd.getFile();

String str = fd.getDirectory() + target;

if (fd.getFile() != null) \{

try \{

String res = "";

FileInputStream fis = new FileInputStream(str);

byte\[\] b = new byte\[1024\];

int count;

while ((count = fis.read(b)) != -1) \{

res = res + new String(b, 0, count);

fis.close();

jta.setText(res);

\} catch (IOException e1) \{

e1.printStackTrace();

if (comm.equals("退出")) \{

System.exit(0);

if (comm.equals("撤销")) \{

if(!al.isEmpty())\{

jta.setText(al.get(al.size()-1));

al.remove(al.size()-1);

if (comm.equals("剪切")) \{

al.add(jta.getText());

jta.cut();

if (comm.equals("复制")) \{

al.add(jta.getText());

jta.copy();

if (comm.equals("粘贴")) \{

al.add(jta.getText());

jta.paste();

if (comm.equals("删除")) \{

al.add(jta.getText());

jta.cut();

if ("查找...".equals(comm) || "替换...".equals(comm)) \{

JDialog jdct = new JDialog(jf,comm);

String label = comm.substring(0, 2);

JButton jb = new JButton(label);

jb.addActionListener(this);

jdct.setLayout(new FlowLayout());

jdct.add(jtf);

if ("替换...".equals(comm)) \{

JLabel jlt = new JLabel(">");

jdct.add(jlt);

jdct.add(jtft);

jdct.add(jb);

if ("替换...".equals(comm)) \{

JButton jball = new JButton("替换全部");

jball.addActionListener(this);

jdct.add(jball);

jdct.pack();

jdct.setResizable(false);

jdct.setLocation(400, 240);

jdct.setVisible(true);

if (comm.equals("全选")) \{

jta.selectAll();

if (comm.equals("关于...")) \{

JDialog jdgy = new JDialog(jf, "关于我...");

jdgy.setLayout(new FlowLayout());

JLabel jl = new JLabel("制作者: xxx ");

JLabel j2 = new JLabel("Email:xxxx@.com ");

jdgy.add(jl);

jdgy.add(j2);

jdgy.setSize(180, 100);

jdgy.setResizable(false);

jdgy.setLocation(400, 240);

jdgy.setVisible(true);

//查找实现

if (comm.equals("查找")) \{

String str = jtf.getText();

String strall = jta.getText();

int n = strall.indexOf(str, set);

if (n != -1) \{

set = n + 1;

jta.setSelectionStart(n);

jta.setSelectionEnd(n + str.length());

//替换实现

if (comm.equals("替换") || comm.equals("替换全部")) \{

al.add(jta.getText());

String str = jtf.getText();

String strall = jta.getText();

if (comm.equals("替换全部")) \{

int n1 = 0;

while (true) \{

set = strall.indexOf(str, n1);

if (set == -1)

break;

n1 = set + 1;

jta.setSelectionStart(set);

jta.setSelectionEnd(set + str.length());

jta.replaceSelection(jtft.getText());

set = 0;

int n = strall.indexOf(str, set);

if (n == -1) \{

set = 0;

\} else \{

set = n + 1;

jta.setSelectionStart(n);

jta.setSelectionEnd(n + str.length());

jta.replaceSelection(jtft.getText());

public Notepad() \{//构造器

jta.setLineWrap(true);

jta.addMouseListener(this);

JMenuBar jmb = new JMenuBar();

JMenu jm1 = new JMenu("文件");

String\[\] label1 = \{ "新建...", "打开...", "保存", "另存...", "退出" \};

JMenuItem\[\] jmi1 = new JMenuItem\[label1.length\];

for (int i = 0; i < jmi1.length; i++) \{

jmi1\[i\] = new JMenuItem(label1\[i\]);

jm1.add(jmi1\[i\]);

jmi1\[i\].addActionListener(this);

jm1.insertSeparator(1);

jm1.insertSeparator(3);

jm1.insertSeparator(6);

JMenu jm2 = new JMenu("编辑");

String\[\] label2 = \{ "撤销", "剪切", "复制", "粘贴", "删除", "查找...", "替换...",

"全选" \};

JMenuItem\[\] jmi2 = new JMenuItem\[label2.length\];

for (int i = 0; i < jmi2.length; i++) \{

jmi2\[i\] = new JMenuItem(label2\[i\]);

jm2.add(jmi2\[i\]);

jmi2\[i\].addActionListener(this);

jm2.insertSeparator(1);

jm2.insertSeparator(5);

jm2.insertSeparator(7);

jm2.insertSeparator(10);

JMenu jm3 = new JMenu("帮助");

JMenuItem jmi3 = new JMenuItem("关于...");

jm3.add(jmi3);

jmi3.addActionListener(this);

jmb.add(jm1);

jmb.add(jm2);

jmb.add(jm3);

jf.setJMenuBar(jmb);

jf.addWindowListener(new WindowAdapter() \{

public void windowClosing(WindowEvent e) \{

jf.removeAll();

jf.dispose();

\});

//鼠标右健弹出菜单

JMenuItem jmi11, jmi22, jmi33, jmi44;

pp.add(jmi11 = new JMenuItem("剪切"));

pp.add(jmi22 = new JMenuItem("复制"));

pp.add(jmi33 = new JMenuItem("粘贴"));

pp.addSeparator();

pp.add(jmi44 = new JMenuItem("全选"));

jmi11.addActionListener(this);

jmi22.addActionListener(this);

jmi33.addActionListener(this);

jmi44.addActionListener(this);

jf.add(pp);

//新建菜单

jd.setLayout(new FlowLayout());

JButton jb1 = new JButton("是");

JButton jb2 = new JButton("否");

JButton jb3 = new JButton("取消");

jd.add(new JLabel("您当前编辑未保存,是否保存?"));

jb1.addActionListener(this);

jb2.addActionListener(this);

jb3.addActionListener(this);

jd.add(jb1);

jd.add(jb2);

jd.add(jb3);

jd.pack();

jf.add(jsp);

jf.pack();

jf.setLocation(300, 200);

jf.setVisible(true);

jf.setDefaultCloseOperation(JFrame.EXIT\_ON\_CLOSE);

public static void main(String\[\] args) \{

new Notepad();

public void mouseClicked(MouseEvent e) \{

if (e.getButton() == 3) \{

pp.setVisible(true);

pp.show(e.getComponent(), e.getX(), e.getY());

public void mouseEntered(MouseEvent e) \{

public void mouseExited(MouseEvent e) \{

public void mousePressed(MouseEvent e) \{

public void mouseReleased(MouseEvent e) \{

java insertseparator_java编写记事本

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