Java 8 Method Reference examples from JLS 8

MethodReferences.java

System::getProperty
String::length
List<String>::size   // explicit class type args
List::size           // inferred class type args, or generic
int[]::clone
T::tvarMember

"abc"::length
foo[x]::bar
(test ? list.map(String::length) : Collections.emptyList())::iterator
super::toString

String::valueOf      // overload resolution needed     
Arrays::sort         // type args (if any) inferred from context
Arrays::<String>sort // explicit type args

ArrayList<String>::new    // constructor for parameterized type
ArrayList::new            // inferred class type args, or generic
Foo::<Integer>new         // explicit generic constructor type arguments
Bar<String>::<Integer>new // generic class, generic constructor
Outer.Inner::new          // inner class constructor
int[]::new                // array "constructor"