Java List. Size () method: returns the number of elements in the list

size()

Example

public static void main(String[] args){
    List<String>list = new ArrayList<String>();
    list.add("保护环境");  //向列表中添加数据
    list.add("爱护地球");  //向列表中添加数据
    list.add("从我做起");  //向列表中添加数据
    int listSize = list.size();  //获取列表中元素的个数
    Sy@R_404_2354@.out.println("列表中元素的个数:"+listSize);
}
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