How do I hide and show toolbars the way the debugger does?

To hide/show a toolbar dynamically in the NetBeans Platform, you should predefine a toolbar configuration first, then activate it.

Define toolbar configuration files alongside the module’s layer: Standard.xml:

<?xml version="1.0"?>
<!DOCTYPE Configuration PUBLIC "-//NetBeans IDE//DTD toolbar//EN"
 "http://www.netbeans.org/dtds/toolbar.dtd">
<Configuration>
    <Row>
        <Toolbar name="View" />
        <Toolbar name="Control" />
        <Toolbar name="Indicator" />
        <Toolbar name="Draw" />
        <Toolbar name="Memory" />
    </Row>
    <Row>
        <Toolbar name="File" position="2" visible="false" />
        <Toolbar name="Edit" position="2" visible="false" />
        <Toolbar name="Build" position="2" visible="false" />
        <Toolbar name="Debug" position="2" visible="false" />
        <Toolbar name="Versioning" position="2" visible="false" />
    </Row>
</Configuration>

Developing.xml:

<?xml version="1.0"?>
<!DOCTYPE Configuration PUBLIC "-//NetBeans IDE//DTD toolbar//EN"
"http://www.netbeans.org/dtds/toolbar.dtd">
<Configuration>
    <Row>
        <Toolbar name="View" />
        <Toolbar name="Control" />
        <Toolbar name="Indicator" />
        <Toolbar name="Draw" />
        <Toolbar name="Memory" />
    </Row>
    <Row>
        <Toolbar name="File" position="2" />
        <Toolbar name="Edit" position="2" />
        <Toolbar name="Build" position="2" />
        <Toolbar name="Debug" position="2" visible="false" />
        <Toolbar name="Versioning" position="2" visible="false" />
    </Row>
</Configuration>

<?xml version="1.0"?>
<!DOCTYPE filesystem PUBLIC "-//NetBeans//DTD Filesystem 1.0//EN"
 "http://www.netbeans.org/dtds/filesystem-1_0.dtd">
<filesystem>
    <folder name="Toolbars">
        <file name="Standard.xml" url="Standard.xml"/>
        <file name="Developing.xml" url="Developing.xml"/>
    </folder>
</filesystem>

At runtime, set the toolbar configuration that you want:

ToolbarPool.getDefault().setConfiguration("Developing");

Apache NetBeans 23

How do I hide and show toolbars the way the debugger does?