1

嗨，我想把我的按钮放在南方的位置！我怎样才能做到这一点？这是我的代码：

import javax.swing.Icon;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.io.*;
import java.util.*;
import javax.swing.JButton;

public class TableDemo extends JPanel {
    private static Icon leftButtonIcon;
    private boolean DEBUG = false;
     // added static infront becuase got non static referencing error
static List<String[]> rosterList = new ArrayList<String[]>();

    public TableDemo() {
        super(new GridLayout(1,0));

        JTable table = new JTable(new MyTableModel());
        table.setPreferredScrollableViewportSize(new Dimension(500, 70));
        table.setFillsViewportHeight(true);

       JButton button=new JButton("Buy it");
       button.setSize(30,60);
        button.add(button);

        //Create the scroll pane and add the table to it.
        JScrollPane scrollPane = new JScrollPane(table);

        //Add the scroll pane to this panel.
        add(scrollPane);
         //create a button

    }

    class MyTableModel extends AbstractTableModel {
        private String[] columnNames = { "Κωδικός", "Ποσότητα", "Τιμή", "Περιγραφή", "Μέγεθος", "Ράτσα"};

        public int getColumnCount() {
            return columnNames.length;
        }

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

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

     public Object getValueAt(int row, int col)
        {
            return rosterList.get(row)[col];

        }


    }


    private static void createAndShowGUI() {
        //Create and set up the window.

        JFrame frame = new JFrame("TableDemo");

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);


        //Create and set up the content pane.
        TableDemo newContentPane = new TableDemo();
        newContentPane.setOpaque(true); //content panes must be opaque
        frame.setContentPane(newContentPane);


        //Display the window.
        frame.pack();
        frame.setVisible(true);
    }
4

4 回答 4

5

像这样的东西？

在此处输入图像描述

请参阅代码中的注释。

import javax.swing.Icon;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import javax.swing.border.EmptyBorder;
import java.awt.Dimension;
import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.io.*;
import java.util.*;
import javax.swing.JButton;

public class TableDemo extends JPanel {    
    private static Icon leftButtonIcon;
    private boolean DEBUG = false;
     // added static infront becuase got non static referencing error
static List<String[]> rosterList = new ArrayList<String[]>();

    public TableDemo() {
        super(new BorderLayout(3,3));

        JTable table = new JTable(new MyTableModel());
        table.setPreferredScrollableViewportSize(new Dimension(500, 70));
        table.setFillsViewportHeight(true);

       JButton button=new JButton("Buy it");
       // Rarely has the intended effect.
       // also best not to presume we can guess the size
       // a component needs to be.
       //button.setSize(30,60);
       // cannot add a button to itself!
        //button.add(button);
        JPanel buttonCenter = new JPanel( new FlowLayout(FlowLayout.CENTER) );
        // allow the button to be centered in buttonCenter,
        // rather than stretch across the width of the SOUTH
        // of the TableDemo
        buttonCenter.add(button);
        add(buttonCenter, BorderLayout.SOUTH);

        //Create the scroll pane and add the table to it.
        JScrollPane scrollPane = new JScrollPane(table);

        //Add the scroll pane to this panel.
        add(scrollPane, BorderLayout.CENTER);
         //create a button

        // add a nice border
        setBorder(new EmptyBorder(5,5,5,5));
    }

    class MyTableModel extends AbstractTableModel {
        // apologies about the column names
        private String[] columnNames = { "??d????", "??s?t?ta", "??µ?", "?e????af?", "???e???", "??tsa"};

        public int getColumnCount() {
            return columnNames.length;
        }

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

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

     public Object getValueAt(int row, int col)
        {
            return rosterList.get(row)[col];

        }
    }


    private static void createAndShowGUI() {
        //Create and set up the window.
        JFrame frame = new JFrame("TableDemo");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        //Create and set up the content pane.
        TableDemo newContentPane = new TableDemo();
        // JPanels are opaque by default!
        //newContentPane.setOpaque(true); //content panes must be opaque
        frame.setContentPane(newContentPane);

        //Display the window.
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        // Should be done on the EDT.
        // Left as an exercise for the reader.
        TableDemo.createAndShowGUI();
    }
}
于 2011-05-20T21:51:33.430 回答
3

“嗨，我想把我的按钮放在南的位置！我该怎么做？”

如果您想在 BorderLayout 位置放置一些东西，让容器使用... BorderLayout, n'est-ce pas?

但说真的，你最近在这个论坛上的大部分问题都表明你在阅读教程之前就来这里了。您已经多次获得链接，所以请帮自己一个忙并正确学习 Swing —— 学习布局教程和其他教程，您将省去很多麻烦和猜测。

于 2011-05-20T21:24:19.267 回答
3

您将按钮添加到自身，如果要将组件放置在 Center / North / South / 等方式中，则应使用BorderLayout ：

setLayout(new BorderLayout());
add(scrollPane, BorderLayout.CENTER);
add(button, BorderLayout.SOUTH);
于 2011-05-20T21:24:39.620 回答
0

尝试这个：

JFrame frame = new JFrame();
frame.add(yourbutton,BORDERLAYOUT.SOUTH)

并为按钮提供位置和大小，请执行此操作

yourbutton.setBounds(10,15,120,200) --> (x,y,height,width) , x , y set possition
于 2014-12-21T17:07:52.303 回答