6 This Quick Reference looks pretty good if you're looking for a language reference. It's especially geared towards the user interface portion of the API. For the complete API, however, I always use …

Sep 3, 2008 · To me, saying that an object's reference is passed by value is the same as saying that the object is passed by reference. I'm a Java novice, but I presume that (in contrast) primitive data is …

Oct 6, 2012 · 326 Everything in Java is passed by value. In case of an array (which is nothing but an Object), the array reference is passed by value (just like an object reference is passed by value). …

Jun 24, 2015 · numbers.forEach(x -> System.out.println(x)); Here, you don't actually need the name x in order to invoke println for each of the elements. That's where the method reference is helpful - the :: …

Jan 1, 2012 · This is one way you can avoid null pointers. with & and ¦ both operands are always evaluated with && and ¦¦ the second operand is only evaluated when it is necessary Here's a link to a …

For deep cloning (clones the entire object hierarchy): commons-lang SerializationUtils - using serialization - if all classes are in your control and you can force implementing Serializable. Java …

A bound non-static method reference refers to a non-static method that's bound to a receiver object. Its syntax is objectName::instanceMethodName, where objectName identifies the receiver and …

Apr 24, 2015 · 2 If you're looking for a quick way to do this, for example debugging, you can simply concatenate an empty string on to the boolean: System.out.println(b+""); However, I strongly …

Apr 16, 2012 · System.out.println(list) should print all the standard java object types (String, Long, Integer etc). In case, if we are using custom object types, then we need to override toString() method …

0 In Java "this" is a predefined variable. If we use "this" in method that's mean we are getting the reference (address) of the currently running object. For an example. this.age ---> age of the currently …