About Question enthuware.ocajp.i.v8.2.1465 :

[rali14043]

THe code does not compiles for me since the statement is missing greate than and less than size for a list <>

List s1 = new ArrayList( );

[admin]

THe code does not compiles for me since the statement is missing greate than and less than size for a list <>

List s1 = new ArrayList( );

Please compile it from command line. There is nothing wrong with it. You will get compiler warning but no error. <> is required only if you are using generics.

[richardsmw0]

Quick question. Shouldn't the List be delcared/defined like this:

List<String> s1 = new ArrayList<String>( );

Is String the default?

[admin]

No, String is not the default. List s1 = new ArrayList( ); means that it is an untyped List, which means the compiler will not check what you put in that list. For example, s1.add(new Integer(1)); and s1.add("hello"); both will be accepted by the compiler.

But when you do List<String> s1 = new ArrayList<String>( ); the compiler will raise an error if you try to add anything other than a String to the list.

This is a feature of Java called "generics". Please go through this tutorial to understand the basics: https://docs.oracle.com/javase/tutorial ... index.html