Question

嗨我想把我的按钮放在南方位置！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);
    }

Answer 1

这样的东西？

enter image description here

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();
    }
}

Answer 2

“嗨，我想把我的按钮放在南方的位置！我怎么样？”

如果你想在BorderLayout位置放置一些东西，让容器使用一个... BorderLayout，n'est-ce pas？

是有意义的。

但严重的是，您在本论坛最近提出的大多数问题都表明您在阅读教程之前就已来到这里。您已经多次获得链接，所以请帮自己一个忙，学习Swing吧 - 学习布局教程和其他教程，你会省去很多悲伤和猜测。

Answer 3

您可以将按钮添加到自身，如果要以中心/北/南/等方式放置组件，则应使用BorderLayout：

setLayout(new BorderLayout());
add(scrollPane, BorderLayout.CENTER);
add(button, BorderLayout.SOUTH);

Answer 4

试试这个：

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

并为按钮提供位置和尺寸，请执行此操作

yourbutton.setBounds(10,15,120,200) --> (x,y,height,width) , x , y set possition

按钮大小和位置

4 个答案: