java实现字符串反转

本文实例为大家分享了java字符串反转的具体代码，供大家参考，具体内容如下

import java.util.stack;

public class stringreverse {

  // 使用内置类(stringbuilder或stringbuffer)
  public static string reverse1(string s) {
    // stringbuilder strbuilder = new stringbuilder(s);
    // string ret = strbuilder.reverse().tostring();
    stringbuffer strbuf = new stringbuffer(s);
    string ret = strbuf.reverse().tostring();
    return ret;
  }

  // 有左到右 拼接字符串
  public static string reverse2(string s) {
    string ret = "";
    for (int i = 0; i < s.length(); ++i) {
      ret = s.charat(i) + ret;
    }
    return ret;
  }

  // 从右到左 拼接字符串
  public static string reverse3(string s) {
    string ret = "";
    for (int i = s.length() - 1; i >= 0; --i) {
      ret += s.charat(i);
    }
    return ret;
  }

  public static string reverse4(string s) {
    string ret = "";
    char[] chararr = s.tochararray();
    int len = chararr.length;
    for (int i = 0; i < len / 2; ++i) {
      char tmp = chararr[i];
      chararr[i] = chararr[len - 1 - i];
      chararr[len - 1 - i] = tmp;
    }
    ret = new string(chararr);
    return ret;
  }

  // 使用异或
  public static string reverse5(string s) {
    string ret = "";
    char[] chararr = s.tochararray();
    int begin = 0, end = chararr.length - 1;
    while (begin < end) {
      chararr[begin] = (char) (chararr[begin] ^ chararr[end]);
      chararr[end] = (char) (chararr[begin] ^ chararr[end]);
      chararr[begin] = (char) (chararr[begin] ^ chararr[end]);

      begin++;
      end--;
    }
    ret = new string(chararr);
    return ret;
  }

  // 使用栈
  public static string reverse6(string s) {
    string ret = "";
    stack<character> stack = new stack<character>();
    for (int i = 0; i < s.length(); ++i) {
      stack.push(s.charat(i));
    }
    while (!stack.isempty()) {
      ret += stack.pop();
    }

    return ret;
  }

}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。