I'm trying to create a short program that would convert all letters that are uppercase to lowercase (from the command line input).
The following compiles but does not give me the result I am expecting. What would be the reason for this??
Eg) java toLowerCase BANaNa -> to give an output of banana
public class toLowerCase{
public static void main(String[] args){
toLowerCase(args[0]);
}
public static void toLowerCase(String a){
for (int i = 0; i< a.length(); i++){
char aChar = a.charAt(i);
if (65 <= aChar && aChar<=90){
aChar = (char)( (aChar + 32) );
}
System.out.print(a);
}
}
}
解决方案
Looks like homework to me, Just a hint. You are printing string a whereas you are modifying the char type aChar, its not modifying the original string a. (Remember strings are immutable).