testhuiwen.java

简单java回文

import javax.swing.*;
import java.lang.*;
public class TestHuiwen{
	public static void main(String [] args)
	{
		String str = JOptionPane.showInputDialog("请输入字符串：");
		if(booleanIsHuiwen(str))
		{
       		JOptionPane.showMessageDialog(null, str+"是回文", "结果", JOptionPane.INFORMATION_MESSAGE);//窗口显示输入字符串
   		}
    	else
    	{
        	JOptionPane.showMessageDialog(null, str+"不是回文", "结果", JOptionPane.INFORMATION_MESSAGE);//窗口显示检验结果
     	}
  }
  public static boolean booleanIsHuiwen(String str){  //bloolean 判断是否为回文的自定义类
   	String buff="";
   	boolean flag=false;
	for(int i=str.length()-1;i>=0;i--)
			if(str.indexOf(" ")!=-1){}

	else{
		buff+=str.charAt(i);//从后往前读取字符写到buff
		}
	if(buff.equalsIgnoreCase(str)){  //忽略大小写比较字符串
     flag=true;
     }
	return flag;
   }
}