java 按钮大小和位置
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button size and position
提问by Εφη Κολοκυθ?
Hi I want to put my button at the South position! How can I do that? Here is my code:
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 = { "Κωδικ??", "Ποσ?τητα", "Τιμ?", "Περιγραφ?", "Μ?γεθο?", "Ρ?τσα"};
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);
}
回答by Andrew Thompson
Something like this?
像这样的东西？
See the comments in the code.
查看代码中的注释。
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();
}
}
回答by Hovercraft Full Of Eels
"Hi i want to put my button at the South posotion! how can i?"
“嗨，我想把我的按钮放在南位置！我怎么做？”
If you want to place something in a BorderLayout location, it would make sense to have the container use a ... BorderLayout, n'est-ce pas?
如果您想在 BorderLayout 位置放置一些东西，让容器使用 ... BorderLayout, n'est-ce pas?
But seriously, most of your recent questions in this forum suggest you're coming here before reading the tutorials. You've already been given the links several times, so please do yourself a favor and learn Swing right -- study the layout tutorials and other tutorials and you will save yourself a lot of grief and guessing.
但说真的，您最近在此论坛中提出的大多数问题都表明您在阅读教程之前来到这里。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，您将省去很多痛苦和猜测。
回答by MByD
You add the button to itself, and you should use BorderLayout, if you want to place the components in Center / North / South / etc. manners:
您将按钮添加到自身，并且您应该使用BorderLayout，如果您想以中心/北/南/等方式放置组件：
setLayout(new BorderLayout());
add(scrollPane, BorderLayout.CENTER);
add(button, BorderLayout.SOUTH);
回答by Mohammadreza Khatami
try this:
试试这个：
JFrame frame = new JFrame();
frame.add(yourbutton,BORDERLAYOUT.SOUTH)
and for give position and size to button,do this
并为按钮提供位置和大小，执行此操作
yourbutton.setBounds(10,15,120,200) --> (x,y,height,width) , x , y set possition
