截取字符串问题.txt

这种重定向的方法

package string; 
class SplitString 
{ 
private String str; 
private int byteNum; 

public SplitString(){} 

public SplitString(String str,int byteNum) 
{ 
this.str=str; 
this.byteNum=byteNum; 

} 

public void splitIt() 
{ 

byte bt[]=str.getBytes(); 
System.out.println("Length of this String ===>"+bt.length); 
if(byteNum>1) 
{ 
   if(bt[byteNum]<0) 
    { 
    String substrx=new String(bt,0,--byteNum); 
    System.out.println(substrx); 
     }
  else 
      { 
          String substrex=new String(bt,0,byteNum); 
           System.out.println(substrex); 
      } 

 }

else 
  { 
   if(byteNum==1) 
     { 
      if(bt[byteNum]<0) 
       { 
        String substr1=new String(bt,0,++byteNum); 
         System.out.println(substr1); 
      }else 
      { 
        String subStr2=new String(bt,0,byteNum); 
         System.out.println(subStr2); 
      }  
    }else 
       { 
        System.out.println("输入错误！！！请输入大于零的整数："); 
       } 
   } 
} 
} 

public class TestSplitString 
{ 
public static void main(String args[]) 
{ 
String str="我ABC汉DEF"; 
int num=6; 
SplitString sptstr = new SplitString(str,num); 
sptstr.splitIt(); 
} 
}