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authorven <vendethiel@hotmail.fr>2016-06-28 18:06:06 +0200
committerGitHub <noreply@github.com>2016-06-28 18:06:06 +0200
commit7812b99ff8f649595a57ef86577c7567cd1c8166 (patch)
treeda84c83c5dd2729bddff4dd0a3cea2b585c80674
parentd3a31e9a7d2752e67e452a28f318710448444ba8 (diff)
Manually merge #1780
fixes #1780
-rw-r--r--java.html.markdown24
1 files changed, 24 insertions, 0 deletions
diff --git a/java.html.markdown b/java.html.markdown
index fb0913f1..f65c484e 100644
--- a/java.html.markdown
+++ b/java.html.markdown
@@ -8,6 +8,7 @@ contributors:
- ["Zachary Ferguson", "http://github.com/zfergus2"]
- ["Cameron Schermerhorn", "http://github.com/cschermerhorn"]
- ["Rachel Stiyer", "https://github.com/rstiyer"]
+ - ["Michael Dähnert", "http://github.com/JaXt0r"]
filename: LearnJava.java
---
@@ -171,6 +172,29 @@ public class LearnJava {
System.out.println(barString);
System.out.println(bazString);
+ // String Building
+ // #1 - with plus operator
+ // That's the basic way to do it (optimized under the hood)
+ String plusConcatenated = "Strings can " + "be concatenated " + "via + operator.";
+ System.out.println(plusConcatenated);
+ // Output: Strings can be concatenated via + operator.
+
+ // #2 - with StringBuilder
+ // This way doesn't create any intermediate strings. It just stores the string pieces, and ties them together
+ // when toString() is called.
+ // Hint: This class is not thread safe. A thread-safe alternative (with some impact on performance) is StringBuffer.
+ StringBuilder builderConcatenated = new StringBuilder();
+ builderConcatenated.append("You ");
+ builderConcatenated.append("can use ");
+ builderConcatenated.append("the StringBuilder class.");
+ System.out.println(builderConcatenated.toString()); // only now is the string built
+ // Output: You can use the StringBuilder class.
+
+ // #3 - with String formatter
+ // Another alternative way to create strings. Fast and readable.
+ String.format("%s may prefer %s.", "Or you", "String.format()");
+ // Output: Or you may prefer String.format().
+
// Arrays
// The array size must be decided upon instantiation
// The following formats work for declaring an array