HarmonyOS ArrayList如何get到指定位置的元素？

let list: ArrayList<string> = new ArrayList<string>(); 
list.add("orange"); 
list.add("Banana"); 
list.add("Cherry"); 
//你可以使用下标1来获取第二个元素： 
let secondElement: string = list[1]; 
console.log(secondElement);
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//xxx.ets 
import { ArrayList } from '@kit.ArkTS'; 
@Entry 
@Component 
struct ArrayListDemo { 
@State list: ArrayList<string> = new ArrayList<string>(); 
AddData(){ 
this.list.add("orange"); 
this.list.add("Banana"); 
this.list.add("Cherry"); 
} 
build() { 
Button('获取第二个数据') 
.onClick(()=>{ 
this.AddData() 
let secondElement: string = this.list[1]; 
console.log(secondElement); 
}) 
} 
}
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