Notepad Find

最新推荐文章于 2024-03-14 11:33:58 发布

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最新推荐文章于 2024-03-14 11:33:58 发布

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分类专栏： JAVA 文章标签： null class 文档 c

本文链接：https://blog.youkuaiyun.com/kimcheolhyun/article/details/4893183

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package notepad;

import javax.swing.JDialog;
import javax.swing.JLabel;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.ButtonGroup;
import javax.swing.JOptionPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JRadioButton;
import javax.swing.text.BadLocationException;

public class Find implements ActionListener
{

private static final long serialVersionUID = 1L;

private JLabel jLabelFind, jLabelReplace;

private JTextField jTextFind, jTextReplace;

private JButton jBtnFind, jBtnReplace, jBtnReplaceAll, jBtnCancel;

private JCheckBox jUpperOrLower;

private JRadioButton jRadioUp, jRadioDn;

private JTextArea jNotepad;

private JDialog findDialog;

private int startIndex = -1;

public Find(JNotepad owner, JTextArea jText)
{
  jNotepad = jText;
  jLabelFind = new JLabel("查找：");
  jLabelFind.setBounds(16, 22, 42, 22);
  jLabelReplace = new JLabel("替换：");
  jLabelReplace.setBounds(16, 52, 42, 22);
  jTextFind = new JTextField();
  jTextFind.setBounds(60, 22, 180, 22);
  jTextReplace = new JTextField();
  jTextReplace.setBounds(60, 52, 180, 22);
  jBtnFind = new JButton("查找(F)");
  jBtnFind.setMnemonic('F');
  jBtnFind.setBounds(250, 22, 102, 22);
  jBtnFind.addActionListener(this);
  jBtnReplace = new JButton("替换(R)");
  jBtnReplace.setMnemonic('R');
  jBtnReplace.setBounds(250, 52, 102, 22);
  jBtnReplace.addActionListener(this);
  jBtnReplaceAll = new JButton("全部替换(A)");
  jBtnReplaceAll.setMnemonic('A');
  jBtnReplaceAll.setBounds(250, 82, 102, 22);
  jBtnReplaceAll.addActionListener(this);
  jBtnCancel = new JButton("取消(X)");
  jBtnCancel.setMnemonic('X');
  jBtnCancel.setBounds(250, 112, 102, 22);
  jBtnCancel.addActionListener(this);
  jUpperOrLower = new JCheckBox("区分大小写(C)", false);
  jUpperOrLower.setMnemonic('C');
  jUpperOrLower.setBounds(14, 100, 106, 22);
  jRadioUp = new JRadioButton("向上", false);
  jRadioUp.setBounds(132, 100, 52, 22);
  jRadioDn = new JRadioButton("向下", true);
  jRadioDn.setBounds(184, 100, 52, 22);
  ButtonGroup group = new ButtonGroup();
  group.add(jRadioUp);
  group.add(jRadioDn);
  findDialog = new JDialog(owner, "查找/替换");
  Container findPane = findDialog.getContentPane();
  findPane.setLayout(null);
  findPane.add(jLabelFind, null);
  findPane.add(jLabelReplace, null);
  findPane.add(jTextFind, null);
  findPane.add(jTextReplace, null);
  findPane.add(jBtnFind, null);
  findPane.add(jBtnReplace, null);
  findPane.add(jBtnReplaceAll, null);
  findPane.add(jBtnCancel, null);
  findPane.add(jUpperOrLower, null);
  findPane.add(jRadioUp, null);
  findPane.add(jRadioDn, null);
  findDialog.setBounds(400, 200, 372, 188);
  findDialog.setModal(false); // 无模式
  findDialog.setResizable(false); // 固定窗体大小
  findDialog.addWindowListener(new WindowAdapter()
  {
   public void windowClosing(WindowEvent e)
   {
    jTextReplace.setText(null);
    jTextFind.setText(null);
    jTextFind.requestFocusInWindow();
   }
  });
}

public void setVisible(boolean flag)
{
jTextFind.requestFocusInWindow();
findDialog.setVisible(flag);
}

public void actionPerformed(ActionEvent e)
{
  if(e.getSource().equals(jBtnFind))
  {
   if(jRadioDn.isSelected())
   {
    if(jUpperOrLower.isSelected())
     startIndex = jNotepad.getText().indexOf(jTextFind.getText(), jNotepad.getSelectionEnd());
    else
     startIndex = jNotepad.getText().toLowerCase().indexOf(jTextFind.getText().toLowerCase(), jNotepad.getSelectionEnd());
   }
   else
   {
    try
    {
     if(jUpperOrLower.isSelected())
      startIndex = jNotepad.getText(0, jNotepad.getSelectionStart()).lastIndexOf(jTextFind.getText());
     else
      startIndex = jNotepad.getText(0, jNotepad.getSelectionStart()).toLowerCase().lastIndexOf(jTextFind.getText().toLowerCase());
    }
    catch(BadLocationException se)
    {
     System.out.print(se.getMessage());
    }
   }
   if(startIndex > -1)
    jNotepad.select(startIndex, startIndex + jTextFind.getText().length());
   else
   {
    JOptionPane.showMessageDialog(findDialog, String.format("找不到“%s” 已完成对文档的搜索。", jTextFind.getText()), "记事本", 1);
    jTextReplace.setText(null);
    jTextFind.requestFocusInWindow();
    jTextFind.selectAll();
   }
  }
  else if(e.getSource().equals(jBtnReplace))
  {
   jNotepad.replaceSelection(jTextReplace.getText());
   jNotepad.select(jNotepad.getSelectionStart() - jTextReplace.getText().length(), jNotepad.getSelectionStart());
  }
  else if(e.getSource().equals(jBtnReplaceAll))
  {
   jNotepad.setSelectionStart(0);
   while(jNotepad.getSelectionStart() < jNotepad.getText().length())
   {
    if(jUpperOrLower.isSelected())
     startIndex = jNotepad.getText().indexOf(jTextFind.getText(), jNotepad.getSelectionStart());
    else
     startIndex = jNotepad.getText().toLowerCase().indexOf(jTextFind.getText().toLowerCase(), jNotepad.getSelectionStart());
    if(startIndex > -1)
    {
     jNotepad.select(startIndex, startIndex + jTextFind.getText().length());
     jNotepad.replaceSelection(jTextReplace.getText());
    }
    else
     break;
   }
  }
  else
  {
   jTextReplace.setText(null);
   jTextFind.setText(null);
   jTextFind.requestFocusInWindow();
   findDialog.setVisible(false);
  }
}

}