diff options
| -rw-r--r-- | java.html.markdown | 70 |
1 files changed, 48 insertions, 22 deletions
diff --git a/java.html.markdown b/java.html.markdown index 57c10390..6487d862 100644 --- a/java.html.markdown +++ b/java.html.markdown @@ -1,20 +1,21 @@ --- language: java contributors: - - ["Jake Prather", "http://github.com/JakeHP"] - - ["Jakukyo Friel", "http://weakish.github.io"] - - ["Madison Dickson", "http://github.com/mix3d"] - - ["Simon Morgan", "http://sjm.io/"] - - ["Zachary Ferguson", "http://github.com/zfergus2"] - - ["Cameron Schermerhorn", "http://github.com/cschermerhorn"] + - ["Jake Prather", "https://github.com/JakeHP"] + - ["Jakukyo Friel", "https://weakish.github.io"] + - ["Madison Dickson", "https://github.com/mix3d"] + - ["Simon Morgan", "https://sjm.io/"] + - ["Zachary Ferguson", "https://github.com/zfergus2"] + - ["Cameron Schermerhorn", "https://github.com/cschermerhorn"] - ["Rachel Stiyer", "https://github.com/rstiyer"] - - ["Michael Dähnert", "http://github.com/JaXt0r"] + - ["Michael Dähnert", "https://github.com/JaXt0r"] + - ["Rob Rose", "https://github.com/RobRoseKnows"] filename: LearnJava.java --- Java is a general-purpose, concurrent, class-based, object-oriented computer programming language. -[Read more here.](http://docs.oracle.com/javase/tutorial/java/) +[Read more here.](https://docs.oracle.com/javase/tutorial/java/) ```java // Single-line comments start with // @@ -389,7 +390,32 @@ public class LearnJava { System.out.println("You answered " + myAnswer); break; } - + + + // Try-with-resources (Java 7+) + // Try-catch-finally statements work as expected in Java but in Java 7+ + // the try-with-resources statement is also available. Try-with-resources + // simplifies try-catch-finally statements be closing resources + // automatically. + + // In order to use a try-with-resources, include a an instance of a class + // in the try statement. The class must implement java.lang.AutoCloseable. + try(BufferedReader br = new BufferedReader(new FileReader("foo.txt"))) { + // You can attempt to do something that could throw an exception. + System.out.println(br.readLine()); + // In Java 7, the resource will always be closed, even if it throws + // an Exception. + } catch (Exception ex) { + //The resource will be closed before the catch statement executes. + System.out.println("readLine() failed."); + } + // No need for a finally statement in this case, the BufferedReader is + // already closed. This can be used to avoid certain edge cases where + // a finally statement might not be called. + // To learn more: + // https://docs.oracle.com/javase/tutorial/essential/exceptions/tryResourceClose.html + + // Conditional Shorthand // You can use the '?' operator for quick assignments or logic forks. // Reads as "If (statement) is true, use <first value>, otherwise, use @@ -418,7 +444,7 @@ public class LearnJava { // Typecasting // You can also cast Java objects, there's a lot of details and deals // with some more intermediate concepts. Feel free to check it out here: - // http://docs.oracle.com/javase/tutorial/java/IandI/subclasses.html + // https://docs.oracle.com/javase/tutorial/java/IandI/subclasses.html /////////////////////////////////////// // Classes And Functions @@ -784,22 +810,22 @@ The links provided here below are just to get an understanding of the topic, fee **Official Oracle Guides**: -* [Java Tutorial Trail from Sun / Oracle](http://docs.oracle.com/javase/tutorial/index.html) +* [Java Tutorial Trail from Sun / Oracle](https://docs.oracle.com/javase/tutorial/index.html) -* [Java Access level modifiers](http://docs.oracle.com/javase/tutorial/java/javaOO/accesscontrol.html) +* [Java Access level modifiers](https://docs.oracle.com/javase/tutorial/java/javaOO/accesscontrol.html) -* [Object-Oriented Programming Concepts](http://docs.oracle.com/javase/tutorial/java/concepts/index.html): - * [Inheritance](http://docs.oracle.com/javase/tutorial/java/IandI/subclasses.html) - * [Polymorphism](http://docs.oracle.com/javase/tutorial/java/IandI/polymorphism.html) - * [Abstraction](http://docs.oracle.com/javase/tutorial/java/IandI/abstract.html) +* [Object-Oriented Programming Concepts](https://docs.oracle.com/javase/tutorial/java/concepts/index.html): + * [Inheritance](https://docs.oracle.com/javase/tutorial/java/IandI/subclasses.html) + * [Polymorphism](https://docs.oracle.com/javase/tutorial/java/IandI/polymorphism.html) + * [Abstraction](https://docs.oracle.com/javase/tutorial/java/IandI/abstract.html) -* [Exceptions](http://docs.oracle.com/javase/tutorial/essential/exceptions/index.html) +* [Exceptions](https://docs.oracle.com/javase/tutorial/essential/exceptions/index.html) -* [Interfaces](http://docs.oracle.com/javase/tutorial/java/IandI/createinterface.html) +* [Interfaces](https://docs.oracle.com/javase/tutorial/java/IandI/createinterface.html) -* [Generics](http://docs.oracle.com/javase/tutorial/java/generics/index.html) +* [Generics](https://docs.oracle.com/javase/tutorial/java/generics/index.html) -* [Java Code Conventions](http://www.oracle.com/technetwork/java/codeconvtoc-136057.html) +* [Java Code Conventions](https://www.oracle.com/technetwork/java/codeconvtoc-136057.html) **Online Practice and Tutorials** @@ -813,6 +839,6 @@ The links provided here below are just to get an understanding of the topic, fee * [Thinking in Java](http://www.mindview.net/Books/TIJ/) -* [Objects First with Java](http://www.amazon.com/Objects-First-Java-Practical-Introduction/dp/0132492660) +* [Objects First with Java](https://www.amazon.com/Objects-First-Java-Practical-Introduction/dp/0132492660) -* [Java The Complete Reference](http://www.amazon.com/gp/product/0071606300) +* [Java The Complete Reference](https://www.amazon.com/gp/product/0071606300) |