简单的数字位置置换

public static String ChangeNumber(String args){
StringBuffer score = new StringBuffer();
for(int i = args.length();i>0;i--){
score.append(args.charAt(i-1));
}
return score.toString();
}
public static String ChangeNumber(String args,int start,int end){
StringBuffer score = new StringBuffer();
String temp = args.substring(start, end);
for(int i = temp.length();i>0;i--){
score.append(temp.charAt(i-1));
}
return score.toString();
}