# Substance look and feel - getting started

This document describes the steps to create a sample Swing application and run it under Substance look and feel.

Since Substance requires JDK 5.0 or higher, if you don't have such an installation on your machine, you need to download it from this site and install it. The command-prompt examples below assume that java executable is in the path. This executable is part of JRE (under bin folder) as well as part of JDK (under bin folder). Consult your OS manual on how to add the relevant folder to the path. Alternatively, you can put the entire path to the java executable in the scripts below.

After you have JDK 5.0+ installed on your machine, create the following `Walkthrough.java` class:

`public class Walkthrough extends JFrame {
public Walkthrough() {
super("Sample app");
this.setLayout(new FlowLayout());
this.add(new JButton("button"));
this.add(new JCheckBox("check"));
this.add(new JLabel("label"));
this.setSize(new Dimension(250, 80));
this.setLocationRelativeTo(null);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public static void main(String[] args) {
JFrame.setDefaultLookAndFeelDecorated(true);
SwingUtilities.invokeLater(new Runnable() {
public void run() {
Walkthrough w = new Walkthrough();
w.setVisible(true);
}
});
}
}`

This is a simple frame (that does nothing) with a button, a checkbox and a label. You can create this class in your favourite IDE or in any text editor. Once this class is created, compile it. If you're using an IDE, consult the IDE help on the compilation process. If you're using a simple text editor, you can compile this class by using:

`javac Walktrough.java`

If you have problems, consult the online help for javac compiler. The compiled `Walkthrough.class` will be created in the same folder as your `Walkthrough.java`. In order to run it, use:

`java -cp . Walkthrough`

You will see the following frame under the default Ocean look and feel:

In order to run the same frame under Substance look and feel, you first need to choose the Substance skin that you would like to use. Suppose that you choose the `Business` skin. Now you have the following options:

- Start your VM with `-Dswing.defaultlaf=org.jvnet.substance.skin.SubstanceBusinessLookAndFeel`
- `UIManager.setLookAndFeel(new SubstanceBusinessLookAndFeel())`
- `UIManager.setLookAndFeel("org.jvnet.substance.skin.SubstanceBusinessLookAndFeel");`

The first option doesn't require any code changes in the application above. Run the following script:

`java -Dswing.defaultlaf=org.jvnet.substance.skin.SubstanceBusinessLookAndFeel -cp . Walkthrough`

You will see the following exception:

`

    Exception in thread "AWT-EventQueue-0" java.lang.Error: Cannot load org.jvnet.substance.skin.SubstanceBusinessLookAndFeel
    	at javax.swing.UIManager.initializeDefaultLAF(UIManager.java:1345)
    	at javax.swing.UIManager.initialize(UIManager.java:1432)
    	at javax.swing.UIManager.maybeInitialize(UIManager.java:1420)
    	at javax.swing.UIManager.getUI(UIManager.java:1007)
    	at javax.swing.JPanel.updateUI(JPanel.java:109)
    	at javax.swing.JPanel.(JPanel.java:69)
    	at javax.swing.JPanel.(JPanel.java:92)
    	at javax.swing.JPanel.(JPanel.java:100)
    	at javax.swing.JRootPane.createGlassPane(JRootPane.java:527)
    	at javax.swing.JRootPane.(JRootPane.java:347)
    	at javax.swing.JFrame.createRootPane(JFrame.java:260)
    	at javax.swing.JFrame.frameInit(JFrame.java:241)
    	at javax.swing.JFrame.(JFrame.java:208)
    	at Walkthrough.(Walkthrough.java:10)
    	at Walkthrough$1.run(Walkthrough.java:25)
    	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
    	at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
    	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:284)
    	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
    	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
    	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
    	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
    	at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

`

This means that the org.jvnet.substance.skin.SubstanceBusinessLookAndFeel class in not found in the classpath. This class is located in the substance.jar that you need to download from the Documents & Files section of the Substance project page. For this example, we assume that the substance.jar is located under C:/temp folder. In order to run the frame under Substance, use the following script:

`java -Dswing.defaultlaf=org.jvnet.substance.skin.SubstanceBusinessLookAndFeel -cp .;C:/temp/substance.jar Walkthrough`

The result is the same frame under Substance look and feel:

The other two options for setting Substance require changing the code. Go back to your Java editor and replace the `main()` method by:

`public static void main(String[] args) {
JFrame.setDefaultLookAndFeelDecorated(true);
try {
UIManager.setLookAndFeel(new SubstanceRavenGraphiteLookAndFeel());
} catch (Exception e) {
System.out.println("Substance Raven Graphite failed to initialize");
}
SwingUtilities.invokeLater(new Runnable() {
public void run() {
Walkthrough w = new Walkthrough();
w.setVisible(true);
}
});
}`

Note that here we are using another Substance skin, `Raven Graphite`. In order to compile the new `Walkthrough.java`, you need to add the substance.jar to the build path. Consult your IDE help if you're using IDE. For command-prompt compilation, use the additional -cp flag:

`javac -cp c:/temp/substance.jar Walktrough.java`

Now you can run your application without the -Dswing.defaultlaf JVM flag, but you still need to specify the location of the substance.jar as before:

`java -cp .;C:/temp/substance.jar Walkthrough`

If you don't want to create an explicit dependency on the Substance classes in your code, change your `main()` method to:

`public static void main(String[] args) {
JFrame.setDefaultLookAndFeelDecorated(true);
try {
UIManager.setLookAndFeel("org.jvnet.substance.skin.SubstanceRavenGraphiteLookAndFeel");
} catch (Exception e) {
System.out.println("Substance Raven Graphite failed to initialize");
}
SwingUtilities.invokeLater(new Runnable() {
public void run() {
Walkthrough w = new Walkthrough();
w.setVisible(true);
}
});
}`

You can run the application the same way as before. Here is how it looks like:

Where to go from here?

- Read the FAQ
- Read about the VM flags
- Read about the client properties
- Read about the API
- Read about using skins
- Download the sources and study the test application in `test/Check.java`
- Read the Javadocs of SubstanceLookAndFeel class.