package test;
public class CycleString {
public String judge(String s){
String b = s + " : 是回文字符串";
for (int j = 0; j < s.length()-1; j++) {
if(s.charAt(j)!=s.charAt(s.length()-1-j)){
b=s+ " : 不是回文字符串";
break;
}
}
return b;
}
//测试
public static void main(String[] args) {
String str = "121";
String str1 = "1212";
String str2 = "12112";
String str3 = "1221";
String str4 = "123321";
String str5 = "12321";
String str6 = "123aa21";
CycleString c = new CycleString();
System.out.println(c.judge(str1));
System.out.println(c.judge(str2));
System.out.println(c.judge(str3));
System.out.println(c.judge(str4));
System.out.println(c.judge(str5));
System.out.println(c.judge(str6));
}
}
测试结果:
1212 : 不是回文字符串
12112 : 不是回文字符串
1221 : 是回文字符串
123321 : 是回文字符串
12321 : 是回文字符串
123aa21 : 不是回文字符串
截图
![](https://img.laitimes.com/img/_0nNw4CM6IyYiwiM6ICdiwiIn5GcuYjN2MTN4IzXEJkRw81M0UDM1EzLchTMzAzLcdTMwIzLcV2YhB3cvw1ckF2bsBXdvwFdl5mLh5WaoN2cv5yYpRXY0N3Lc9CX6MHc0RHaiojIsJye.png)