notepad.java

用java写的简单记事本程序,看看。还行吧。

        {
			text.selectAll();
		}
		if(strCmd.equals("清空"))
		{
			text.setText("");
		}
        if(strCmd.equals("复制"))
        {
            str=text.getSelectedText();
        }
        if(strCmd.equals("粘贴"))
        {
            text.insert(str,text.getCaretPosition());
        }
        if(strCmd.equals("剪切"))
        {
                        str=text.getSelectedText();
                        text.replaceRange("",text.getSelectionStart(),text.getSelectionEnd());

                }
        if(strCmd.equals("字体"))
        {
            d.setVisible(true);
        }
        if(strCmd.equals("颜色选择"))
        {
                        Color c=JColorChooser.showDialog(this,"颜色选择",Color.black);
                        text.setForeground(c);
                        Red=c.getRed();
                        Green=c.getGreen();
                        Blue=c.getBlue();
                }
                if(e.getSource()==tFind||e.getSource()==bFind)
                {

                        find();
                        return;
                }

                if(e.getSource()==tReplace||e.getSource()==bReplace)
                {
                        text.requestFocus();
                        String s1=tReplace.getText();
                        if (text.getSelectedText().equals(tFind.getText()))
                        {

                                int start=text.getSelectionStart();
                                text.replaceRange(s1, text.getSelectionStart(), text.getSelectionEnd());
                                text.select(start,start+s1.length());
                        }
                        else
                                find();
                        return;
                }

                if(e.getSource()==bReplaceAll)
                {
                        text.requestFocus();
                        String s1=tReplace.getText();
                        str = text.getText();
                        String strFind = tFind.getText();
                        int start  = 0;
                        int end = str.length();
                        int len = strFind.length();
                        int count=0;
                        if (start<=end-len)
                        {
                                for (;start <= end - len; start++) {
                                if (str.substring(start, start + len).equals(strFind)) {
                                        count++;
                                        text.replaceRange(s1, start,start + len);
                                        text.select(start,start+s1.length());
                                 }
                                }
                        }
                        if(count==0)
                           JOptionPane.showConfirmDialog(findD,"没有找到!","替换提示",JOptionPane.YES_NO_OPTION);
                        else
                          JOptionPane.showConfirmDialog(findD,"共替换字符"+count+"个.","替换提示",JOptionPane.YES_NO_OPTION,JOptionPane.INFORMATION_MESSAGE);
                        return;
                }
                if(strCmd.equals("查找"))
                { findD.setVisible(true);
                }
                if(strCmd.equals("替换"))
                {
                        findD.setVisible(true);
                }
                if(strCmd.equals("插入时间"))
                {
                        text.setText(text.getText()+date);
                }
        if(strCmd.equals("确定"))
        {
            String s1="",s2="",s3="";
            int s;
            s1=c1.getSelectedItem();
            Str1=s1;
            System.out.print(s1);
            s2=c2.getSelectedItem();
            if(s2.equals("粗体"))
                s=1;
            else if(s2.equals("斜体"))
                s=2;
            else if(s2.equals("粗体与斜体"))
                s=3;
             else
                 s=0;
             Str2=s2;
            s3=c3.getSelectedItem();
            text.setFont(new Font(s1,s,Integer.parseInt(s3)));
            Str3=s3;
            d.setVisible(false);
        }
        if(strCmd.equals("取消"))
        {
            d.setVisible(false);
        }
        if(strCmd.equals("关于"))
        {
            About.setVisible(true);
        }
        if(strCmd.equals("自动换行"))
        {
			text.setLineWrap(true);
		}
    }
    public void openFile() throws IOException
    {
        String str1="",str2="",string="";
        int n=0;
       Color c;
        FileDialog fd=new FileDialog(this,"打开对话框",FileDialog.LOAD);
        fd.setVisible(true);
        File file=new File(fd.getDirectory()+fd.getFile());
        str1=(fd.getFile()).substring(0,(fd.getFile()).length()-4);
        File fStyle=new File(fd.getDirectory()+str1+".css");
        FileReader fileReader=new FileReader(fStyle);
        BufferedReader br=new BufferedReader(fileReader,4096);
        while((str2=br.readLine())!=null)
        {
            string+=str2;

        }
        br.close();
        System.out.println(string);
        StringTokenizer str3=new StringTokenizer(string,"/");
        String []str4=new String[6];
        while(str3.hasMoreTokens())
        {
            str4[n]=str3.nextToken();
            n++;
        }
        System.out.print(str4[0]);
        Str1=str4[0];
        Str2=str4[1];
        Str3=str4[2];
        Red=Integer.parseInt(str4[3]);
        Green=Integer.parseInt(str4[4]);
        Blue=Integer.parseInt(str4[5]);
         c=new Color(Red,Green,Blue);
          text.setForeground(c);
        if(Str2.equals("粗体"))
        {
            temp=1;
        }
        if(Str2.equals("斜体"))
        {
            temp=2;
        }
        if(Str2.equals("粗体与斜体"))
        {
            temp=3;
        }
        if(Str2.equals("普通"))
        {
            temp=0;
        }
        FileReader fr=new FileReader(file);
        BufferedReader bufr=new BufferedReader(fr,4096);
        text.setText("");
        String texts="",s;
        while((s=bufr.readLine())!=null)
        {
            text.setFont(new Font(Str1,temp,Integer.parseInt(Str3)));
            texts+=s+"\n";
        }
        text.setText(texts);
        bufr.close();
    }
    public void saveFile() throws IOException
    {
        FileDialog fd=new FileDialog(this,"保存对话框",FileDialog.SAVE);
        fd.setVisible(true);
        File file=new File(fd.getDirectory()+fd.getFile()+".txt");
        File fileStyle=new File(fd.getDirectory()+fd.getFile()+".css");
        fileStyle.createNewFile();
        FileWriter fw =new FileWriter(file);
        BufferedWriter bufw=new BufferedWriter(fw);
        FileWriter fstyle=new FileWriter(fileStyle);
        BufferedWriter bufw2=new BufferedWriter(fstyle);
        String temp="/"+Str1+"/"+Str2+"/"+Str3+"/"+Red+"/"+Green+"/"+Blue+"/";
        bufw2.write(temp,0,temp.length());
        bufw2.flush();
        bufw2.close();
        String s=text.getText();
        bufw.write(s,0,s.length());
        bufw.flush();
        bufw.close();
    }
    public void find()
     {
     text.requestFocus();
     str = text.getText();
     String strFind = tFind.getText();
     int end = str.length();
     int len = strFind.length();
     int start = text.getSelectionEnd();
     if (start == end)
     start = 0;
     for (;start <= end - len; start++) {
     if (str.substring(start, start + len).equals(strFind)) {
     text.select(start,start+len);
      return;
      }
      }
      JOptionPane.showConfirmDialog(findD,"没有找到！！","提示",JOptionPane.YES_NO_OPTION);
      text.select(start,start+len);
      }
}
public class NotePad
{
    public static void main(String [] args)
    {
       MyTextPad np=new MyTextPad("计事本");
    }
}