从 ArrayList 创建 JTable [英] Create JTable from ArrayList

问题描述

现在我设法将文件中的对象放入ArrayList，我必须将它们显示到JTable中.

Now that I managed to put the objects from a file into a ArrayList, I have to display them into a JTable.

这些是包含在我的 ArrayList

Lieu<Double, String>(45.573715, -73.900295, "p1");
Lieu<Double, String>(45.573882, -73.899748, "p2");
Lieu<Double, String>(45.574438, -73.900099, "p3");

在 Lieu 类中，我有方法 getX() 和 getY()

In the Lieu class I have the methods getX() and getY()

但我不知道如何在 JTable 中显示它们.

But I can't figure out how to diplay them in a JTable.

Longitude           Latitude
45.573715           -73.900295
45.573882           -73.899748
45.574438           -73.900099

这是我的开始:

public class MonModel extends AbstractTableModel{

    @Override
    public int getColumnCount() {
        return 2;
    }

    @Override
    public int getRowCount() {
        return l.size();//l is the arraylist that contains the 3 elements
    }

    @Override
    public Object getValueAt(int rowIndex, int columnIndex) {
        if(columnIndex==0){
            return l.get(rowIndex).getX();
        }
        else if(columnIndex==1){
            return l.get(rowIndex).getY();
        }
        return null;
    }

推荐答案

使用 TableModel 来显示 JTable 中的数据.例如:

Use a TableModel for showing data in the JTable. For Example:

在 UI 类中，将表格模型设置为表格.

In UI class, set the table model to the table.

JTable table = new JTable(new MonModel());

表模型类

class MonModel extends AbstractTableModel {

    private List<LatNLon> l;
    private String[] columnNames = {"Longitude", "Latitude"};

    public MonModel() {
        l = new ArrayList<LatNLon>();

        l.add(new LatNLon("45.573715", "-73.900295"));
        l.add(new LatNLon("45.573715", "-73.900295"));
        l.add(new LatNLon("45.573715", "-73.900295"));
    }

    @Override
    public String getColumnName(int column) {
        return columnNames[column];
    }

    public int getColumnCount() {
        return 2;
    }

    public int getRowCount() {
        return l.size();
    }

    public Object getValueAt(int rowIndex, int columnIndex) {
        if(columnIndex==0){
            return l.get(rowIndex).getX();
        }
        else if(columnIndex==1){
            return l.get(rowIndex).getY();
        }
        return null;
    }
}

纬度和经度类.

class LatNLon {
    private String x;
    private String y;

    public LatNLon(String x, String y) {
        this.x = x;
        this.y = y;
    }
// Code: For Getters and Setters.
}

另请阅读如何使用表格.

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