file.cs

Java开发的一个编译器,有词法分析

using System; 
using System.IO; 
using System.Windows.Forms; 
using System.Text;

namespace dialog 
{ 
/// 
/// Summary description for File. 
/// 
public class File 
{ 
string fileName; 
public File(string fileName) 
{ 
this.fileName=fileName; 
}

public string ReadFile() 
{ 
try 
{ 
StreamReader sr=new StreamReader(fileName,Encoding.Default); 
string result=sr.ReadToEnd(); 
sr.Close(); 
return result; 
} 
catch(Exception e){MessageBox.Show(e.Message);} 
return null; 
}

public void WriteFile(string str) 
{ 
try 
{ 
StreamWriter sw=new StreamWriter(fileName,false,Encoding.Default); 
sw.Write(str); 
sw.Close(); 
} 
catch(Exception e){
    MessageBox.Show(e.Message,"保存文件出错！");
} 
} 
} 
}