huiwen.java

实现回文

package huiwen;

import java.io.UnsupportedEncodingException;

import javax.swing.JOptionPane;
import javax.swing.JOptionPane;

public class Huiwen {

	public static void main(String argc[]) throws UnsupportedEncodingException
	{
		String w;
		w=JOptionPane.showInputDialog("请输入字符串");
		char[] q1= w.toCharArray();
		double st =System.nanoTime();
		for(int i=w.length()-1;i>=0;i--)
		{
			System.out.print(q1[i]);
		}
		double et=System.nanoTime();
		double x=et-st;
		System.out.println();
		System.out.println(et);
		System.out.println(st);
		System.out.println("时间是"+x+"纳秒=1000微秒=1000000纳秒");
		System.out.println(w);	
	}
}