buffertest3.java

Java 程序设计源码 只提供了部分

import javax.swing.*;

public class BufferTest3 {	
	public static void main(String[] args) {
		String s = JOptionPane.showInputDialog(null,"请输入一个字符串：","输入示例",JOptionPane.QUESTION_MESSAGE);

		String output = "";
	
		output =  "不考虑大小写\n 是[" + s + "]" + "是一个回文字符吗？" + isPalinderome(s); 

		JOptionPane.showMessageDialog(null,output,"示例输出",JOptionPane.INFORMATION_MESSAGE);	

		System.exit(0);	
	}
	
	public static boolean isPalinderome(String s) {
		String s1 = filter(s);

		String s2 = reverse(s1);

		return s2.equals(s1);	
	}

	public static String filter(String s) {
		StringBuffer strBuf = new StringBuffer();	

		for(int i = 0; i < s.length(); i++) {
			if(Character.isLetterOrDigit(s.charAt(i)))
				strBuf.append(s.charAt(i));
		}
		return strBuf.toString();
	}

	public static String reverse(String s) {
		StringBuffer s1 = new StringBuffer(s);

		s1.reverse();
	
		return s1.toString();
	}		
}