import org.junit.Test;
public class solution {
@Test
public void testFunc(){
String string = "hello";
String reString = reverseString(string);
System.out.println("res: "+reString);
}
// 字符串的逆序
public String reverseString(String str){
if (str==null || str.length()<=1) {
return str;
}
char[] charArray = str.toCharArray();
String res="";
for(int i =charArray.length-1;i>=0;i--){
res+=charArray[i];
}
return res;
}
}