java, myeclipse工具编写的文本编辑器，实现文本编辑的基本功能

/* * TextEditor1.java * * Created on __DATE__, __TIME__ */ package text; import java.awt.Color; import java.awt.Font; import java.io.*; import java.sql.Struct; import javax.swing.JColorChooser; import javax.swing.JFileChooser; import javax.swing.JOptionPane; import javax.swing.text.AttributeSet.FontAttribute; import javax.swing.text.StyleConstants.FontConstants; import org.omg.CORBA.PUBLIC_MEMBER; import sun.awt.FontConfiguration; import com.sun.org.apache.bcel.internal.generic.NEW; import com.sun.org.apache.bcel.internal.generic.RETURN; import com.sun.xml.internal.txw2.Document; import font.JFontChooser; import font.LHFont; /** * * @author __USER__ */ public class TextEditor1 extends javax.swing.JFrame { /** Creates new form TextEditor1 */ public TextEditor1() { initComponents(); } /** This method is called from within the constructor to * initialize the form. * WARNING: Do NOT modify this code. The content of this method is * always regenerated by the Form Editor. */ //GEN-BEGIN:initComponents // <editor-fold defaultstate="collapsed" desc="Generated Code"> private void initComponents() { jScrollPane1 = new javax.swing.JScrollPane(); jTextArea1 = new javax.swing.JTextArea(); jLabel2 = new javax.swing.JLabel(); jMenuBar1 = new javax.swing.JMenuBar(); jMenu1 = new javax.swing.JMenu(); jMenuItem1 = new javax.swing.JMenuItem(); jMenuItem2 = new javax.swing.JMenuItem(); jMenuItem3 = new javax.swing.JMenuItem(); jMenuItem4 = new javax.swing.JMenuItem(); jMenuItem5 = new javax.swing.JMenuItem(); jMenu2 = new javax.swing.JMenu(); jMenuItem8 = new javax.swing.JMenuItem(); jMenuItem6 = new javax.swing.JMenuItem(); jMenuItem7 = new javax.swing.JMenuItem(); setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); jTextArea1.setColumns(20); jTextArea1.setRows(5); jScrollPane1.setViewportView(jTextArea1); jMenu1.setText("\u6587\u4ef6"); jMenuItem1.setText("\u65b0\u5efa"); jMenuItem1.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jMenuItem1ActionPerformed(evt); } }); jMenu1.add(jMenuItem1); jMenuItem2.setText("\u6253\u5f00"); jMenuItem2.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jMenuItem2ActionPerformed(evt); } }); jMenu1.add(jMenuItem2); jMenuItem3.setText("\u4fdd\u5b58"); jMenuItem3.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jMenuItem3ActionPerformed(evt); } }); jMenu1.add(jMenuItem3); jMenuItem4.setText("\u53e6\u5b58\u4e3a"); jMenuItem4.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jMenuItem4ActionPerformed(evt); } }); jMenu1.add(jMenuItem4); jMenuItem5.setText("\u9000\u51fa"); jMenuItem5.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jMenuItem5ActionPerformed(evt); } }); jMenu1.add(jMenuItem5); jMenuBar1.add(jMenu1); jMenu2.setText("\u8bbe\u7f6e"); jMenuItem8.setText("\u8bbe\u7f6e\u524d\u666f\u8272"); jMenuItem8.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jMenuItem8ActionPerformed(evt); } }); jMenu2.add(jMenuItem8); jMenuItem6.setText("\u8bbe\u7f6e\u80cc\u666f\u8272"); jMenuItem6.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jMenuItem6ActionPerformed(evt); } }); jMenu2.add(jMenuItem6); jMenuItem7.setText("\u8bbe\u7f6e\u5b57\u4f53"); jMenuItem7.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jMenuItem7ActionPerformed(evt); } }); jMenu2.add(jMenuItem7); jMenuBar1.add(jMenu2); setJMenuBar(jMenuBar1); javax.swing.GroupLayout layout = new javax.swing.GroupLayout( getContentPane()); getContentPane().setLayout(layout); layout .setHorizontalGroup(layout .createParallelGroup( javax.swing.GroupLayout.Alignment.LEADING) .addGroup( layout .createSequentialGroup() .addContainerGap() .addGroup( layout .createParallelGroup( javax.swing.GroupLayout.Alignment.LEADING) .addComponent( jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 649, Short.MAX_VALUE) .addComponent( jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 270, javax.swing.GroupLayout.PREFERRED_SIZE)) .addContainerGap())); layout .setVerticalGroup(layout .createParallelGroup( javax.swing.GroupLayout.Alignment.LEADING) .addGroup( javax.swing.GroupLayout.Alignment.TRAILING, layout .createSequentialGroup() .addContainerGap(38, Short.MAX_VALUE) .addComponent( jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 370, javax.swing.GroupLayout.PREFERRED_SIZE) .addPreferredGap( javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(jLabel2).addGap(8, 8, 8))); pack(); }// </editor-fold> //GEN-END:initComponents private void jMenuItem7ActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: JFontChooser fontChooser = new JFontChooser(); LHFont font = fontChooser.showDialog(this, "aaa"); jTextArea1.setFont(font.getFont()); jTextArea1.setForeground(font.getColor()); } private void jMenuItem6ActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: Color color = JColorChooser.showDialog(this, "背景色", jTextArea1 .getBackground()); if (color != null) { jTextArea1.setBackground(color); } } private void jMenuItem8ActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: Color color = JColorChooser.showDialog(this, "前景色", jTextArea1 .getBackground()); if (color != null) { jTextArea1.setBackground(color); } } String filename; boolean isSaved = false; Document document; JFileChooser jFileChooser1 = new JFileChooser(); private void jMenuItem5ActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: if (toExit()) System.exit(0); } private void jMenuItem4ActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: saveAs(); } private void jMenuItem3ActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: save(); } private void jMenuItem2ActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: openfile(); } private void jMenuItem1ActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: newFile(); } /** * @param args the command line arguments */ void openfile() { if (!toExit()) { return; } if (JFileChooser.APPROVE_OPTION == jFileChooser1.showOpenDialog(this)) { try { String filename1 = jFileChooser1.getSelectedFile().getPath(); File file = new File(filename1); int size = (int) file.length(); char[] data = new char[size]; FileReader in = new FileReader(file); int readChar = 0; while (in.ready()) { readChar = readChar + in.r