读取控制台的字符串_方法二

package com.cici.common;
import java.io.BufferedReader;
import java.io.InputStreamReader;


public class SystemIn {
     public static int readInt(){
          BufferedReader br = null;
          try{
           br = new BufferedReader( new InputStreamReader( System.in) ) ;
           String line = br.readLine();
           int ret = Integer.parseInt( line );
           return ret ; 
          }catch( Exception e ){
           e.printStackTrace();
           return -1 ;
          }
         } 
         
         public static double readDouble(){
          BufferedReader br = null;
          try{
           br = new BufferedReader( new InputStreamReader( System.in) ) ;
           String line = br.readLine();
           double ret = Double.parseDouble( line );
           return ret ; 
          }catch( Exception e ){
           e.printStackTrace();
           return -1 ;
          }
         }
         
         public static String readString(){
          BufferedReader br = null;
          try{
           br = new BufferedReader( new InputStreamReader( System.in) ) ;
           String line = br.readLine();
           return line ; 
          }catch( Exception e ){
           e.printStackTrace();
           return null;
          }
         }
        }

        class Test{ 
         public static void main( String args[] ){
          int i = SystemIn.readInt();
          double d = SystemIn.readDouble();
          String s = SystemIn.readString();
          System.out.println( i + "\t" + d + "\t" + s ) ;
         } 
}

public class SystemInApp{
 
public static void main(String[] args) throws Exception {

        
        System.out.println("Please insert the pageNO :"); int pageNo =
        SystemIn.readInt();
         
         System.out.println("Please insert the lineMount :"); int lineMount =
         SystemIn.readInt();
         
         System.out.println("Please insert the listMount :"); int listMount =
         SystemIn.readInt();
 
    
}