我正在尝试将Car类型的ArrayList转换为2D Array。不幸的是,我没有Java8。我在Java 7上,而在Java 8上,应该有一种简单的方法来实现它:
String[][] stringArray = miniTable.stream().map(u -> u.toArray(new String[0])).toArray(String[][]::new);
ArrayList:
miniTable = new ArrayList<Car>();
miniTable.add(new Car("1123", "New York, NY", "Green"));
miniTable.add(new Car("3321", "Tampa, FL", "Blue"));
miniTable.add(new Car("3346", "Atlanta, GA", "Red"));,
逻辑
int count=0;
String[][] content = new String [3][5];
//Convert regular array to [][]
for(int i=0;i<3;i++)
{
for(int j=0;j<5;j++)
{
if(count == miniTable.size()) break;
content[i][j]= miniTable.get(i).getNumber();
content[i][j]= miniTable.get(i).getOrigin();
content[i][j]= miniTable.get(i).getColor();
count++;
}
}
答案 0 :(得分:1)
我不明白为什么不能使用数组列表映射到表,但是构造数组可以执行以下操作:
String[][] content = new String [3][5];
for(int i = 0; i < miniTable.size(); i++)
{
Car car = miniTable.get(i);
content[i][0] = car.getName();
content[i][1] = car.getManufacturer();
....
}
答案 1 :(得分:1)
不需要内部循环。您想将每个<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="carousel" class="carousel slide" data-ride="carousel">
<div runat="server" id="CarouselHtml" class="carousel-inner" style="height: 500px;">
</div>
<div id="item" class="item"
<a href="#carousel" ID="tagLeft" onclick="waitchange();" class="left carousel-control" data-slide="prev">
<span class="glyphicon glyphicon-chevron-left"></span>
</a>
<a href="#carousel" ID="tagR" class="right carousel-control" onclick="waitchange();"; data-slide="next">
<span class="glyphicon glyphicon-chevron-right" ></span>
</a>
</div>
</div>
字段映射为2d数组的列值。
所以改变:
Car
至:
for(int j=0;j<5;j++)
{
if(count == miniTable.size()) break;
content[i][j]= miniTable.get(i)+"";
count++;
}