键盘输入类

  /************************************************** 
*Author:Java619 
*Time:2006-5
*E-Mail:ceun@163.com 
*QQ:395676370 
**************************************************/ 

import java.io.*; 

public class Input ...{ 
      
     private InputStreamReader in=new InputStreamReader(System.in); 
     private BufferedReader reader=new BufferedReader(in); 
      
     public String readString() ...{ 
            String s=""; 
            try ...{ 
                  s=reader.readLine(); 
            } catch(IOException e) ...{ 
                  System.out.println(e); 
                  System.exit(0); 
            } 
            return s; 
      } 
       
     public char readChar() ...{ 
            char ch=' '; 
            try ...{ 
                  String s=readString(); 
                  ch=s.charAt(0); 
            } catch(Exception e) ...{ 
                  System.out.println("Error input type. The program will exit."); 
                  System.exit(0); 
            } 
            return ch; 
      } 
       
     public int readInt() ...{ 
            String s=readString(); 
            int i=0; 
            try ...{ 
                  i=Integer.parseInt(s); 
            } catch(Exception e) ...{ 
                  System.out.println("Error input type. The program will exit."); 
                  System.exit(0); 
            } 
            return i; 
      } 
       
     public double readDouble() ...{ 
            String s=readString(); 
            double d=0.0; 
            try ...{ 
                  d=Double.parseDouble(s); 
            } catch(Exception e) ...{ 
                  System.out.println("Error input type. The program will exit."); 
                  System.exit(0); 
            } 
            return d; 
      } 
       
     public float readFloat() ...{ 
            String s=readString(); 
            float f=0.0f; 
            try ...{ 
                  f=Float.parseFloat(s); 
            } catch(Exception e) ...{ 
                  System.out.println("Error input type. The program will exit."); 
                  System.exit(0); 
            } 
            return f; 
      } 
}