JAVA将一个字符串反向颠倒

//将一个字符串反向颠倒
public static String reserver(String str,Integer start,Integer end){
char[] c=str.toCharArray();
return reserver(c,start,end);
}
//将一个字符串反向颠倒
public static String reserver(char[] s,Integer start,Integer end){
for(int i=start,j=end;i<j;i++,j--){
char temp=s[i];
s[i]=s[j];
s[j]=temp;
}
return new String(s);

}