Launching the Open Type dialog

You can use the following code to launch the JDT's Open Type dialog to select a Java Type name and then open it in the Java editor programmatically:

OpenTypeSelectionDialog dialog = new OpenTypeSelectionDialog(
    PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell(),
    true,
    PlatformUI.getWorkbench().getProgressService(),
    null,
    IJavaSearchConstants.TYPE);
dialog.setTitle(JavaUIMessages.OpenTypeAction_dialogTitle);
dialog.setMessage(JavaUIMessages.OpenTypeAction_dialogMessage);
dialog.setInitialPattern("java.lang.String");

int result= dialog.open();
if (result != IDialogConstants.OK_ID)
{
    return;
}

Object[] types= dialog.getResult();
if (types != null && types.length > 0) {
    IType type= null;
    for (int i= 0; i < types.length; i++) {
        type= (IType) types[i];
        try {
            JavaUI.openInEditor(type, true, true);
        } catch (CoreException x) {
            // Handle exception
        }
    }
}