When I run test2 it gives me the follow error:run: java.lang.ExceptionInInitializerError Caused by: java.lang.RuntimeException: Uncompilable source code - class test2 is public, should be declared in a file named test2.java at test2.<clinit>(test.java:79) Exception in thread "main" Java Result: 1 BUILD SUCCESSFUL (total time: 1 second) This is where it is supposed to reverse the output.

cowgirl1996 · Dec 16, 2013 3:56 PM

Here you go. try to debug this code to see how it actually works.   public class MyStringTest{      public static void main(String []args){                 String str = "ABCDEFGH";         for(int i = str.length()-1; i>=0; i--) {             System.out.print(str.charAt(i));         }      } }

blog · Dec 16, 2013 6:13 PM

The file-name should be test2.java (not test.java) Or you can keep the file-name as test.java and change the class name to "test" from "test2". That is change the code snippet "public class test2" to "public class test".

_nepali · Dec 16, 2013 10:58 PM

public class MyStringTest {                                  //Class name MyStringTest         public static void main(String args[]){         String s = new String("TEST STRING");      //initializes String instance with a String literal         String reverseString = new String();            //temp variable to hold reverse string;         for(int i = s.length()-1; i>-1; i--){                     //using loop structure and length() of string class.             reverseString += s.charAt(i);                      //using charAt()         }         System.out.println(reverseString);     } }

kalikopoi · Dec 17, 2013 10:40 AM

What went wrong on your code. 1.Compilation Error: Your class name must match the file name on which main method is invoked. You have defined your class as "test2" but you might have save it as test.java. Rename it to test2.java 2. Two Constructor and Two Methods : I believe that you have used the template provided by your university. There are two methods named "reverse". one of which throw the unsupported exception and another one which contains your code. Remove the one that throws unsupported exception. Similarly you constructor has been written twice. i.e. you have two MyStringtest() in your code. Remove the one which contains unsupported exception. 3. You haven't passed any string while initializing the  constructor. Initialize the constructor with a string ie. ("mystring") instead of passing the string on reverse method.    DO THIS  MyStringTest mst = new MyStringTest("Ishwarkobardan");   mst.reverse(); Instead of   MyStringTest mst = new MyStringTest();  mst.reverse("MyStringTest");  I have attached the code for you. You must SAVE this file as Main.java to get the output.   class MyStringTest  {     String name;     public MyStringTest(String temp)//constructer that initializes  object     {         name=temp;     }       public void reverse()     {         int len = name.length();         String s="";         for(int i=len-1; i>=0; i--)           {             char c=name.charAt(i);             String s1 = Character.toString(c);             s=s.concat(s1);         }         System.out.println (s);       }     }   public class Main {       public static void main(String[] args) {         MyStringTest mst = new MyStringTest("Ishwarkobardan");         mst.reverse();       } }       HAPPY CODING :) :) :) Last edited: 17-Dec-13 06:48 PM Last edited: 17-Dec-13 06:50 PM

kehiminute · Dec 17, 2013 6:48 PM