Java实现字符串倒序输出的几种方法

1. 最容易想到的估计就是利用String类的toCharArray()，再倒序输出数组的方法了。

import javax.swing.JOptionPane; public class ReverseString { public static void main (String args[]){ String originalString; String resultString = ""; originalString = JOptionPane.showInputDialog("Please input a String: "); char[] charArray = originalString.toCharArray(); for (int i=charArray.length-1; i>=0; i--){ resultString += charArray[i]; } JOptionPane.showMessageDialog(null, resultString, "Reverse String", JOptionPane.INFORMATION_MESSAGE); } }

2. 还可以利用String类提供的subString()方法，利用递归的办法输出倒序字符串。

import javax.swing.JOptionPane; public class ReverseString { public static void reverseString (String str){ if (str.length() == 1){ System.out.print(str); } else{ String subString1 = str.substring(0, str.length()-1); String subString2 = str.substring(str.length()-1); System.out.print(subString2); reverseString (subString1); } } public static void main (String args[]){ String originalString; originalString = JOptionPane.showInputDialog("Please input a String: "); reverseString (originalString); } }

3. 还有就是不把字符串定义为String类，而是定义成一个StringBuffer类，用StringBuffer类中的reverse()方法直接倒序字符串。
import javax.swing.JOptionPane; public class ReverseString { public static void reverseString (String str){ StringBuffer stringBuffer = new StringBuffer (str); System.out.print(stringBuffer.reverse()); } public static void main (String args[]){ String originalString; originalString = JOptionPane.showInputDialog("Please input a String: "); reverseString (originalString); } }

不知道大家还有什么补充的没有？？？