javax.sound.sampled.CompoundControl#getMemberControls ( )源码实例Demo

public static void main(String args[]) throws Exception {
    System.out.println();
    System.out.println();
    System.out.println("4629190: CompoundControl: getMemberControls() and toString() throw NullPointerException");

    String firstControlTypeName = "first_Control_Type_Name";
    String secondControlTypeName = "second_Control_Type_Name";
    String thirdControlTypeName = "third_Control_Type_Name";

    Control.Type firstControlType = new TestControlType(firstControlTypeName);
    Control.Type secondControlType = new TestControlType(secondControlTypeName);
    Control.Type thirdControlType = new TestControlType(thirdControlTypeName);

    Control firstControl = new TestControl(firstControlType);
    Control secondControl = new TestControl(secondControlType);
    Control thirdControl = new TestControl(thirdControlType);

    String testCompoundControlTypeName = "CompoundControl_Type_Name";
    CompoundControl.Type testCompoundControlType
        = new TestCompoundControlType(testCompoundControlTypeName);

    Control[] setControls = { firstControl, secondControl, thirdControl };
    CompoundControl testedCompoundControl
        = new TestCompoundControl(testCompoundControlType, setControls);

    // this may throw exception if bug applies
    Control[] producedControls = testedCompoundControl.getMemberControls();
    System.out.println("Got "+producedControls.length+" member controls.");

    // this may throw exception if bug applies
    String producedString = testedCompoundControl.toString();
    System.out.println("toString() returned: "+producedString);

    System.out.println("Test passed.");
}
 

private void createControlChildren(JavaMixer.ControlNode controlNode) {
    if (controlNode.getControl() instanceof CompoundControl) {
        CompoundControl control = (CompoundControl) controlNode.getControl();
        Control[] aControls = control.getMemberControls();
        for (Control con : aControls) {
            JavaMixer.ControlNode conNode = new JavaMixer.ControlNode(con);
            createControlChildren(conNode);
            controlNode.add(conNode);
        }
    }
}