7 种将字符串反转的 Java 方法代码,Java代码库,德仔网

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【Java】 7 种将字符串反转的 Java 方法

作者:红薯 / 发布于2012/3/6/ 662

7 种将字符串反转的 Java 方法

import java.util.Stack;</div>
<div>public class StringReverse {</div>
<div></div>
<div>public static String reverse1(String s) {</div>
<div> int length = s.length();</div>
<div> if (length <= 1)</div>
<div> return s;</div>
<div> String left = s.substring(0, length / 2);</div>
<div> String right = s.substring(length / 2, length);</div>
<div> return reverse1(right) + reverse1(left);</div>
<div>}
<div></div>
<div>public static String reverse2(String s) {</div>
<div> int length = s.length();</div>
<div> String reverse = "";</div>
<div> for (int i = 0; i < length; i++)</div>
<div> reverse = s.charAt(i) + reverse;</div>
<div> return reverse;</div>
<div>}
<div></div>
<div>public static String reverse3(String s) {</div>
<div> char[] array = s.toCharArray();</div>
<div> String reverse = "";</div>
<div> for (int i = array.length - 1; i >= 0; i--)</div>
<div> reverse += array[i];</div>
<div></div>
<div> return reverse;</div>
<div>}
<div></div>
<div>public static String reverse4(String s) {</div>
<div> return new StringBuffer(s).reverse().toString();</div>
<div>}
<div></div>
<div>public static String reverse5(String orig) {</div>
<div> char[] s = orig.toCharArray();</div>
<div> int n = s.length - 1;</div>
<div> int halfLength = n / 2;</div>
<div> for (int i = 0; i <= halfLength; i++) {</div>
<div> char temp = s[i];</div>
<div> s[i] = s[n - i];</div>
<div> s[n - i] = temp;</div>
<div> }
<div> return new String(s);</div>
<div>}
<div></div>
<div>public static String reverse6(String s) {</div>
<div></div>
<div> char[] str = s.toCharArray();</div>
<div></div>
<div> int begin = 0;</div>
<div> int end = s.length() - 1;</div>
<div></div>
<div> while (begin < end) {</div>
<div> str[begin] = (char) (str[begin] ^ str[end]);</div>
<div> str[end] = (char) (str[begin] ^ str[end]);</div>
<div> str[begin] = (char) (str[end] ^ str[begin]);</div>
<div> begin++;</div>
<div> end--;</div>
<div> }
<div></div>
<div> return new String(str);</div>
<div>}
<div></div>
<div>public static String reverse7(String s) {</div>
<div> char[] str = s.toCharArray();</div>
<div> Stack<Character> stack = new Stack<Character>();</div>
<div> for (int i = 0; i < str.length; i++)</div>
<div> stack.push(str[i]);</div>
<div></div>
<div> String reversed = "";</div>
<div> for (int i = 0; i < str.length; i++)</div>
<div> reversed += stack.pop();</div>
<div></div>
<div> return reversed;</div>
<div>}
<div></div>
<div>}

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　字符串反转　

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