显示ArrayList表 [英] display a table of ArrayList

问题描述

我有一个 main.java 有一个按钮，当你按下它时，它会调用一个方法并返回一个节点的ArrayList;
我想在表中显示ArrayList（类节点中描述的5个字段）
如何做到这一点，问题是显示一些字段，因为它们是List类型？

I have a main.java that has a button, when you press it, it calls a method and retuns an ArrayList of Nodes; I want to display the ArrayList in a table ( 5 fields as described in class Node) How to do that, The problem is to display some fields as they are List type?

Node.java

public class Node {
    private String name;
    private double value;
    private List<Node> first;
    private List<Node> second;
    private List<Double> values;

        //some methods... 
}

main .java

main.java

import java.awt.Button;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
public class Main {
    public static void main(String[] args) {
             JFrame frame = new JFrame("Red Bayesiana Visita a Asia ");
             JPanel panel = new JPanel();
             boton = new Button( "Get");
             panel.add(boton);
             frame.add(panel);

             ArrayList<Node>  arrayList;

             boton.addActionListener(new ActionListener() {
                    public void actionPerformed(ActionEvent e) {
                         arrayList = method("file.txt");
                         //insert into table arrayList of 5 fields? 
                    }
            });

         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         frame.setSize(400, 400);
         frame.setVisible(true);
    }
}

推荐答案

As在 创建表格模型中讨论 a>，让节点扩展 AbstractTableModel 并实现所需的方法。使用生成的模型创建 JTable 。

As discussed in Creating a Table Model, let Nodes extend AbstractTableModel and implement the required methods. Use the resulting model to create your JTable.

附录：这是模型的概述。字段 name 和 value 可以使用默认渲染器，但你将决定如何渲染每个节点中找到的列表 。

Addendum: Here's an outline of the model. The fields name and value can use the default renderer, but you'll have decide how to render the Lists found in each Node.

import java.util.ArrayList;
import java.util.List;
import javax.swing.table.AbstractTableModel;

/** @see http://stackoverflow.com/questions/5438516 */
public class Nodes extends AbstractTableModel {

    private List<Node> nodes = new ArrayList<Node>();

    @Override
    public int getRowCount() {
        return nodes.size();
    }

    @Override
    public int getColumnCount() {
        return 5; // A Node has five members
    }

    @Override
    public Object getValueAt(int row, int col) {
        Node node = nodes.get(row);
        switch (col) {
            case 0:
                return node.name;
            case 1:
                return node.value;
            case 2:
                return node.first;
            case 3:
                return node.second;
            case 4:
                return node.values;
            default:
                return null;
        }
    }

    @Override
    public Class getColumnClass(int c) {
        return getValueAt(0, c).getClass();
    }

    private class Node {

        private String name;
        private double value;
        private List<Node> first;
        private List<Node> second;
        private List<Double> values;
    }
}

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