java - PCB 类型中的方法 placeComponent() 不适用于参数 (HardwareComponent)

Question

我正在尝试将硬件组件添加到包含对象数组的 PCB，但我无法将对象传递到数组。这是我的第一个 Java 项目，所以这里完全是新手。请帮忙!

public class PCB {
    private Collection<HardwareComponent> hwComponents = new Vector<HardwareComponent>();
    private Collection<CircuitPath> connections = new Vector<CircuitPath>();

    public void placeComponent(<HardwareComponent> hw) {
        hwComponents.add(hw);
    }

还有我的主要内容

 public class Configurator {

    public static void main(String[] args) {

        PCB pcb = new PCB();

        HardwareComponent c1 = new Capacitor("cap1", 0.55f);
        HardwareComponent c2 = new Capacitor("cap2", 0.22f);
        HardwareComponent c3 = new Capacitor("cap3", 0.50f);
        HardwareComponent c4 = new Capacitor("cap4", 0.75f);
        HardwareComponent r1 = new Resistor("res1", 0.14f);
        HardwareComponent r2 = new Resistor("res2", 0.18f);
        HardwareComponent r3 = new Resistor("res3", 0.17f);
        HardwareComponent r4 = new Resistor("res4", 0.10f);

        pcb.placeComponent(c1);

我收到此错误:PCB 类型中的方法 placeComponent() 不适用于参数 (HardwareComponent)

不知道从这里开始，我是否需要为 PCB 类创建一个单独的构造函数，或者如何将 HardwareComponent 传递给方法 placeComponent？

提前谢谢

Answer 1

方法签名错误 public void placeComponent(<HardwareComponent> hw) .
尝试用 public void placeComponent(HardwareComponent hw)