1.创建一个kotlin类A
class A constructor(a:String,b:String){
var name ="";
var age="";
init {
name = a;
age = b;
}
}
2.创建一个集合
var list = ArrayList<A>();
var list = ArrayList<A>();
list.clear()
var a = A("张三","18");
var b = A("李四","20");
var c = A("王五","25");
list.add(a);
list.add(b)
list.add(c)
3.遍历一个集合
for(a in list){//类似于java中的foreach
Toast.makeText(this,a.name,Toast.LENGTH_LONG).show()
}
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