[java]字母大小写的转换

public class uptolowcharacter
{
public static void main(String args[]){
char a[]={'a','b','c','D','E','F'};
for(int i=0;i<a.length;i++){
if(Character.isLowerCase(a[i]))
a[i]=Character.toUpperCase(a[i]);
else if (Character.isUpperCase(a[i]))
a[i]=Character.toLowerCase(a[i]);
}
for(int i=0;i<a.length;i++)
System.out.print(" "+a[i]);
}

}