字符串反转（力扣题库）

public static void main(String[] args) {

reverse(new char[]{'a','b','c'});

}

public static void reverse(char[] s){
for (int i = 0; i <(int)(s.length/2); i++) {
s[i]=(char)(((int)s[i])+((int)s[s.length-i-1]));
s[s.length-i-1]=(char)(((int)s[i])-((int)s[s.length-i-1]));
s[i]=(char)(((int)s[i])-((int)s[s.length-i-1]));
}
for (int i = 0; i < s.length; i++) {
System.out.print(s[i]);
}

}