Editing Java syntax (section)

===Universal types===

Classes in the package java.lang are implicitly imported into every program, as long as no explicitly-imported types have the same names. Important ones include:

====java.lang.Object====
{{code|java.lang.Object}} is Java's [[top type]]. It is implicitly the superclass of all classes that do not declare any parent class (thus all classes in Java inherent from <code>Object</code>. All values can be converted to this type, although for primitive values this involves [[Object type (object-oriented programming)#Autoboxing|autoboxing]].

====java.lang.String====
{{code|java.lang.String}} is Java's basic string type. [[immutable object|Immutable]]. Some methods treat each [[UTF-16]] code unit as a "character", but methods to convert to an <code>int[]</code> that is effectively [[UTF-32]] are also available.

====java.lang.Throwable====
{{code|java.lang.Throwable}} is supertype of everything that can be [[exception handling|thrown or caught]] with Java's <code>throw</code> and <code>catch</code> statements.