//?外觀主題
????????class?Large?{
????????????constructor(theme)?{
????????????????//?主題顏色
????????????????this.theme?=?theme;
????????????}
????????????//?設(shè)置主題顏色
????????????setThemeColor()?{
            console.log("Large主題顏色設(shè)置為"?+?this.theme.getColor());
????????????}
????????}
????????//?內(nèi)容主題
????????class?Small?{
????????????constructor(theme)?{
????????????????//?主題顏色
????????????????this.theme?=?theme;
????????????}
????????????//?設(shè)置主題顏色
????????????setThemeColor()?{
?console.log("Small主題顏色設(shè)置為"?+?this.theme.getColor());
????????????}
????????}

       class?RedTheme?{
????????????getColor()?{
???????????????return?"red";
????????????}
????????}
????????class?BlueTheme?{
????????????getColor()?{
????????????????return?"blue";
????????????}
????????}
????????class?YellowTheme?{
????????????getColor()?{
????????????????return?"yellow";
????????????}
????????}

      //?創(chuàng)建主題顏色
????????const?RedTheme?=?new?RedTheme();
????????const?BlueTheme?=?new?BlueTheme();
????????const?YellowTheme?=?new?YellowTheme();
????????//?主題模塊

     const?Large?=?new?Large(RedTheme);
????????const?Small?=?new?Small(BlueTheme);
????????//?設(shè)置外觀主題和內(nèi)容主題
????????Large.setThemeColor()
????????Small.setThemeColor()

        class FirstAid {
            constructor(identifier) {
                // 救護車編號
                this.identifier = identifier;
                // 需要救得病人
                this.patient = null;
            }
            // 添加病人
            setPatient(patient) {
                this.patient = patient;
            }
            // 是否已有急救任務(wù)
            receivePatient() {
                // 通過是否分配病人進行判斷
                if (this.patient) {
                    console.log(this.identifier + '已接收病人');
                } else {
                    console.log(this.identifier + '未接收病人，可接收急救任務(wù)');
                }
            }
        }

     // 創(chuàng)建急救車
        let first1 = new FirstAid('急救車1');
        let first2 = new FirstAid('急救車2');
        //分派急救任務(wù)
        first1.setPatient('小孩');
        //詢問是否可接收急救任務(wù)
        first1.receivePatient();
        first2.receivePatient();