findtext.java

java写字板 功能于windows自带的写字板相似

/*
 * FindText.java
 *
 * Created on 2007年12月10日, 下午5:45
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package WordTest;

import java.awt.*;
 import java.awt.event.*;
 import javax.swing.*;
 import javax.swing.event.*; 
 import javax.swing.text.*;
import WordTest.*;
/**
 *
 * @author Administrator
 */
public class FindText extends JDialog implements ActionListener {
    private JTextField FindTxt=new JTextField(20);
    private JLabel ShowText=new JLabel("查找内容：");
    private  JPanel p1 = new JPanel();
    private  JPanel p2 = new JPanel();
    private JButton FindNext=new JButton("查找下一个");
    private JButton FindEnter=new JButton("确定");
    //private JButton FindCancel=new JButton("取消");
     String str,strnext;
  	int startp,endp,nexttemp,newstartp,newendp;
    /** Creates a new instance of FindText */
    public FindText(JFrame fra,String str) {
         super(fra,str);

	        this.setLocation(300,200);
	       
                   p1.setLayout(new FlowLayout());
        p1.add(ShowText);
        p1.add(FindTxt);
         p2.setLayout(new FlowLayout());
         p2.add(FindNext);
         p2.add(FindEnter);
       //  p2.add(FindCancel);
         add("North",p1);
         add("South",p2);
      
         setSize(400,100);
         this.show();
         FindNext.addActionListener(this);
         FindEnter.addActionListener(this);
       //  FindCancel.addActionListener(this);
    }
    // <editor-fold defaultstate="collapsed" desc=" 查找事件区 ">      
  void FindNextEvent()
    {
  nexttemp = newendp; /////获取上次查找的终点做为未查找字符串的起点
        String strall = MainFrame.TextArea.getText();
        MainFrame.TextArea.select(nexttemp,strall.length()); /////选中所有未查找的字符串
        strnext = MainFrame.TextArea.getSelectedText();
        newstartp = strnext.indexOf(FindTxt.getText()) + nexttemp;/////在未查找的字符串里搜索对应字符的在TXT1中的位置
        newendp = newstartp + FindTxt.getText().length();
        MainFrame.TextArea.select(newstartp,newendp); ////找到相应文本，并选择
        NoFind();
  }
void FindEnterEvent()
{
    if(!FindTxt.getText().equals(""))
    {
        this.dispose();
    }
    else
    { 
        str = MainFrame.TextArea.getText();
        //返回FindTxt.getText()对应字符在当前字符串中出现的饿第一个位置
            startp = str.indexOf(FindTxt.getText());//
            endp = startp + FindTxt.getText().length();
           MainFrame.TextArea.select(startp,endp);//选中
            
            newendp = endp;////////获取这次查找的终点
            NoFind();
        
    }
}
 void NoFind()
{
     if(!MainFrame.TextArea.getSelectedText().equals(FindTxt.getText())) 
        { 
           MainFrame.TextArea.setCaretPosition(0); //光标返回文件头部
           JOptionPane.showMessageDialog(null,"查找不到对应的字符！","查找结果",JOptionPane.ERROR_MESSAGE);
           
        }
}
 // </editor-fold>
    public void actionPerformed(ActionEvent e) {
        if(e.getSource()==FindNext)
        {
            FindNextEvent();
        }
        else if(e.getSource()==FindEnter)
        {
            FindEnterEvent();
        }
       // else if(e.getSource()==FindCancel)
        //{  this.hide();
        //    this.dispose();
           
       // }
    }
    
}