Java variable declaration, assignment problem

Review the following code to write a method of modification that allows the program to perform correctly
1.public class MyClass {
2. Static String S1;
3. String S2;
4. public static void Main (String args[]) {
5. String S3;
6. System.out.println ("S1 =" + S1);
7. System.out.println ("s2 =" + s2);
8. System.out.println ("s3 =" + S3);
9.}

10.}

Resolve: Delete line 8th or change line 5th to string s3 = "";

This problem involves the declaration assignment of variables, summarized as follows:

Instance variable declarations can be uninitialized and the system is automatically initialized to 0 or null;

Local variables must first be assigned before they are used;

The local variable is the same as the instance variable and the local variable.

The local variable allows the same name within its scope;