Tag: eclipse tips

eclipse January 25, 2017 by mkyong 1 comment

Eclipse – How to know this class belongs to which JAR

For example, I want to know this SpringBootApplication class belongs to which JAR or dependency : import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication public class SpringBootWebApplication { public static void main(String[] args) throws Exception { SpringApplication.run(SpringBootWebApplication.class, args); } } Solution In Eclipse IDE, double clicks on the class name, press CTRL + SHIFT + T (win/*nix) or […]

eclipse June 9, 2015 by mkyong 4 comments

Eclipse – How to change web project context root

If you run or debug a web project in Eclipse, the project name will be the default context root. For example, a project named “springmvc”, the default context root will be http://localhost:8080/springmvc Technologies tested : Eclipse 4.4 Eclipse Tomcat server plugin Maven 3 Gradle 2.0 Note The context root tell you the URL of a […]

eclipse February 2, 2015 by mkyong 12 comments

How to change Eclipse theme

In this tutorial, we will show you how to change the Eclipse Theme. Tools used : Eclipse 4.4 Luna, works on earlier version. Eclipse Color Theme Plugin Figure : This is how your final Eclipse IDE looks like 1. Install Eclipse Color Theme Plugin Install the theme plugin and restart Eclipse. Eclipse menu -> Help […]

eclipse July 17, 2013 by mkyong 6 comments

How to add copyright to Eclipse automatically

A quick guide to show you how to add @Copyright comment to new and existing Java files in Eclipse IDE. Solution 1. Eclipse Code Templates Go to preferences -> Java -> Code Style -> Code Templates, expands Code and select “New Java Files”, edit the template to add whatever copyright messages you want. Now, that […]

eclipse July 15, 2013 by mkyong 2 comments

How to find Java class in Eclipse?

In Eclipse IDE, you can type CTRL + SHIFT + T in Windows or *nix or Command + SHIFT + T in Mac OSX to prompt an Open Type dialog box to find details about a specified Java class. For example, if you want to know the detail of this Java class – FlatFileItemWriter (Spring […]

eclipse February 22, 2012 by mkyong 7 comments

How to import class automatically in Eclipse

In Eclipse, to import a single class, you may clicked on the class and press shortcut key “Ctrl + Space” to prompt all the available classes to import. However, if you copied a Java source code from somewhere and more than 20+ classes are not import, are you going to press “Ctrl + Space” one […]

eclipse February 22, 2012 by mkyong 3 comments

How to remove unused imports in Eclipse

Often times, after code refactor or bug fixed, Eclipse IDE will show a yellow underline for all unsed imports at the top of your class and said “The import xxx is never used“. To remove those unused imports automatically, just click on the class and press the shortcut “Ctrl + Shift + O” to initilize […]

eclipse February 21, 2012 by mkyong 37 comments

How to display line numbers in Eclipse

By default, Eclipse’s editor will not display line numbers, it’s no good for debugging. Here’s a tip to show you how to turn on the “display line numbers” feature in Eclipse. In Eclipse IDE, select “Windows” > “Preference” > “General” > “Editors” > “Text Editors” , check on the “Show line numbers” option. See result.

maven April 19, 2011 by mkyong 8 comments

Integrate Maven with Eclipse via External Tool Configuration

During Eclipse development, it’s not practical to go outside of the Eclipse’s environment and execute Maven command in external console. In this article, we show you how to integrate Maven command with Eclipse IDE, via Eclipse’s “External Tool Configuration“. Normally, this external tool is used to run external command within Eclipse environment, and it works […]

java September 25, 2009 by mkyong 2 comments

How to view Java class hierarchy in Eclipse IDE?

Eclipse IDE, press CTRL + T or F4 to view the Java class hierarchy, no need to search the JavaDoc API online. Note For Mac OS X, press Command + T Steps to show class hierarchy 1. Clicks on a class, press CTRL + T to view the subtype hierarchy. 2. Press CTRL + T […]