Unicode码和字符间的相互转换

//**************************************************************************
//UnicodetoChar 

public class UnicodetoChar { //以空格为分隔
     private String theString;
     
     public UnicodetoChar(String theString){
    	 this.theString = theString;
     }
     
     public String convert(){
    	 int i=0;                    //临时变量
    	 String s  = new String ();  //用于保存转换后的字符
    	 String thechar = new String();//当前将要转换的Unicode
    	while(i<theString.length()){   //每次循环转换一个Unicode码
    		while(i<theString.length()&&(theString.charAt(i)!=' ')){
    		 thechar += theString.charAt(i++);   //其实每次的thechar是单个字符
    	 }
    	 s+=(char)Integer.parseInt(thechar);
    	 thechar ="";
    	 i++;
     }
     return s;
     }
}


//**************************************************************************
//ChartoUnicode

public class ChartoUnicode {
   private String theString;
   
   public ChartoUnicode(String aString){
	   theString = aString;
   }
   
   public String convert(){
	   int i,j;
	   String chartodigit = new String();// 保存转换后的Unicode码
	   for(i=0;i<theString.length();i++){  //每次循环转换一个字符
		   j = (int)theString.charAt(i); //将一个字符转换为Unicode码
		   chartodigit+=j+" ";  //将转换后的Unicode码保存起来
	   }
	   return chartodigit;
   }
}