Here is a simple yet effective trick for all Eclipse users. In Java we do lot of String concatenation using plain old “” + “”. It is easy but not too effective. StringBuilder is always preferred if you have too many strings to concate.
In below screencast, I convert concatenated strings to StringBuilder using eclipse Ctrl + 1 option.
Move cursor on String “foo” and press Ctrl + 1. It opens a context menu. Select option Use “StringBuilder” for string concatenation
String foo = "This" + "is" + "Sparta";
System.out.println(foo);Code language: Java (java)Once done, the code will be converted to below:
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.append("This");
stringBuilder.append("is");
stringBuilder.append("Sparta");
String foo = stringBuilder.toString();
System.out.println(foo); Code language: Java (java)Enjoy :)
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Yay, you're back! We missed you.
:) Yay. Hope will get more time to write. Thanks for following.. ^_^
Hi Viral,
few small comments.
1.) The taken example isn't well-chosen.
[code language="java"]String foo = "This" + "is" + "Sparta";[/code]
will be compiled as
[code language="java"]String foo = "This is Sparta";[/code]
2.) if you consider following case
[code language="java"]String foo = "This" + variable + "Sparta";[/code]
this will lead in a more optimised bytecode by the compiler
[code language="java"]String foo = (new StringBuilder()).append("This").append(variable).append("Sparta").toString();[/code]
3.) in case many variables needs to be concatenated I prefer to use String.format(..) (very simple example)
[code language="java"][/code]String foo = String.format("%s from %s has %s %s", name, town, amount, gadgets);
cheers
very good stuff. Thanks
Excellent