Java:thinging in Java p158 Exercise 1

Create a class with a String field this is initialized at the point of definition, and another one, which is initialized by The constructor. What's the difference between the approaches.

1 classtest{2 String S1;3String s2= "Hello World";4 String S3;5 Test () {6s3= "Hello Java";7     }8 }9  Public classConstructortest {Ten  One      Public Static voidMain (String[]args) { A          -Test t=NewTest (); - System.out.println (T.S1); the System.out.println (T.S2); - System.out.println (T.S3); -          -     } +}

Output

NULL Hello Worldhello java

Java:thinging in Java p158 Exercise 1