16、Java集合、泛型与流操作详解

Java集合、泛型与流操作详解

1. 集合介绍与实践

当有电话呼入时，回调方法 phoneRings() 会被调用，信号可以按如下方式解码：

import java.util.BitSet;
class VendingMachineListener {
    public void phoneRings(BitSet signal) {
        int size = signal.size();
        for (int i = 0; i < size; i++) {
            if (signal.get(i)) {
                switch (i) {
                    case 0:
                        System.out.println("Box is empty");
                        break;
                    case 1:
                        System.out.println("Box is half full");
                        break;
                    case 2:
                        System.out.println("Box is full");
                        break;
                    // more cases come here