Java: Difference between revisions

Revision as of 13:07, 1 November 2019

Java is a popular object-oriented programming language.

Usage

Features

AutoCloseable

StackOverflow Reference
AutoCloseable Java 8
Since Java does not have destructors and thus no RAII objects, you will need to close anything you open manually.
One way to automate this is to use autocloseable classes introduced in Java 7.
These classes, which implement that AutoCloseable interface, can be wrapped in a try block This is similar to using in Python and C#.

try (Scanner scanner = new Scanner(s)) {
    while (scanner.hasNext()) {
        // do something
    }
} // close will be implicitly called

@@ Line 1: / Line 1: @@
 Java is a popular object-oriented programming language.
+==Usage==
+==Features==
+===AutoCloseable===
+[https://stackoverflow.com/questions/28329419/when-does-a-local-string-scanner-get-garbage-collected StackOverflow Reference]<br>
+[https://docs.oracle.com/javase/8/docs/api/java/lang/AutoCloseable.html AutoCloseable Java 8]<br>
+Since Java does not have destructors and thus no RAII objects, you will need to close anything you open manually.<br>
+One way to automate this is to use autocloseable classes introduced in Java 7.<br>
+These classes, which implement that AutoCloseable interface, can be wrapped in a try block
+This is similar to <code>using</code> in Python and C#.<br>
+<syntaxhighlight lang="java">
+try (Scanner scanner = new Scanner(s)) {
+    while (scanner.hasNext()) {
+        // do something
+    }
+} // close will be implicitly called
+</syntaxhighlight>