/方法1 遞歸方法
public static String reverse1(String s) {
int length = s.length();
if(length <= 1){
return s;
}
String left = s.substring(0, length / 2);
String right = s.substring(length / 2, length);
return reverse1(right) + reverse1(left);
}
//方法2 通過 charAt(int index)返回char值進行字符串拼接
public static String reverse2(String s) {
int length = s.length();
String reverse = "";
for(int i = 0; i < length; i++)
reverse = s.charAt(i) + reverse;
return reverse;
}
//方法3 把字符串轉換成字符數組倒敘拼接然后返回值
public static String reverse3(String s) {
char[] array = s.toCharArray();
String reverse = "";
for(int i = array.length - 1; i >= 0; i--)
reverse += array[i];
return reverse;
}
//方法4 調用StringBuffer中的reverse方法
public static String reverse4(String s) {
return new StringBuffer(s).reverse().toString();
}
//方法5 把字符串轉換成字符數組首位對調位置
public static String reverse5(String orig) {
char[] s = orig.toCharArray();
intn = s.length - 1;
int halfLength = n / 2;
for(int i = 0; i <= halfLength; i++) {
chartemp = s[i];
s[i] = s[n - i];
s[n - i] = temp;
}
return new String(s);
}
//方法6
public static String reverse6(String s) {
char[] str = s.toCharArray();
int begin = 0;
int end = s.length() - 1;
while(begin < end) {
str[begin] = (char) (str[begin] ^ str[end]);
str[end] = (char) (str[begin] ^ str[end]);
str[begin] = (char) (str[end] ^ str[begin]);
begin++;
end--; }
return new String(str);
}
//方法7
import java.util.Stack;
public class StringReverse {
public static String reverse7(String s) {
char[] str = s.toCharArray();
Stack<Character> stack = new Stack<Character>();
for (int i = 0; i < str.length; i++)
stack.push(str[i]);
String reversed = "";
for (int i = 0; i < str.length; i++)
reversed += stack.pop();
return reversed;
}
}