Swing
Swing教學首頁
Swing介紹
Swing開發環境安裝
Swing控件
Swing Component類
Swing Container類
Swing JComponent類
Swing JLabel
Swing JButton
Swing JColorChooser
Swing JCheckBox
Swing JRadioButton
Swing JList
Swing JComboBox
Swing JTextField
Swing JTextArea
Swing ImageIcon
Swing JScrollBar
Swing JOptionPane
Swing JFileChooser
Swing JProgressBar
Swing JSlider
Swing JSpinner
Swing事件處理
SWING Event事件類
SWING AWTEvent事件類
SWING ActionEvent事件類
SWING InputEvent事件類
SWING KeyEvent事件類
SWING MouseEvent事件類
SWING WindowEvent事件類
SWING AdjustmentEvent事件處理
SWING ComponentEvent處理類
SWING ContainerEvent事件處理類
SWING MouseMotionEvent事件處理
SWING PaintEvent事件類
Swing事件監聽器
SWING ActionListener接口
SWING ComponentListener接口
Swing ItemListener接口
Swing KeyListener接口
Swing MouseListener Interface
Swing WindowListener接口
Swing AdjustmentListener接口
Swing ContainerListener接口
Swing MouseMotionListener接口
Swing FocusListener接口
Swing事件適配器
Swing FocusAdapter類
Swing KeyAdapter類
Swing MouseAdapter類
Swing WindowAdapter類
Swing MouseMotionAdapter類
Swing Layout佈局
Swing LayoutManager接口
Swing LayoutManager2接口
Swing BorderLayout佈局
Swing CardLayout佈局
Swing FlowLayout佈局類
Swing GridLayout佈局類
Swing GridBagLayout佈局類
Swing GroupLayout佈局類
Swing SpringLayout佈局類
Swing Menu菜單類
Swing JMenuBar類
Swing JMenuItem類
Swing JMenu類
Swing JCheckboxMenuItem類及例子
Swing JRadioButtonMenuItem類及例子
Swing JPopupMenu類及實例
Swing容器
Swing JPanel類及實例
Swing JFrame類和實例
Swing JWindow類及實例

Swing FlowLayout佈局類

FlowLayout類讓組件在左到右的流動佈局。

類聲明

以下是聲明 java.awt.FlowLayout類:

public class FlowLayout extends Object implements LayoutManager, Serializable

字段域

下面是 java.awt.BorderLayout類的字段:

  • static int CENTER -- 該值指示每一行組件都應該集中間。

  • static int LEADING -- 此值指示每一行組件都應該是合理的容器的方向的前緣,例如,在左到右的方向的左側。

  • static int LEFT -- 此值表示每行組件都應該是左對齊。

  • static int RIGHT -- 此值表示每行組件都應該是右對齊。

  • static int TRAILING -- 此值指示每一行組件都應該是合理的容器的方向的後緣,例如,在左到右的方向的右側。

類構造函數

S.N.

構造函數 & 描述

1

FlowLayout()
Constructs a new FlowLayout with a centered alignment and a default 5-unit horizontal and vertical gap.

2

FlowLayout(int align)
Constructs a new FlowLayout with the specified alignment and a default 5-unit horizontal and vertical gap.

3

FlowLayout(int align, int hgap, int vgap)
Creates a new flow layout manager with the indicated alignment and the indicated horizontal and vertical gaps.

類方法

S.N.

方法 & 描述

1

void addLayoutComponent(String name, Component comp)
Adds the specified component to the layout.

2

int getAlignment()
Gets the alignment for this layout.

3

int getHgap()
Gets the horizontal gap between components.

4

int getVgap()
Gets the vertical gap between components.

5

void layoutContainer(Container target)
Lays out the container.

6

Dimension minimumLayoutSize(Container target)
Returns the minimum dimensions needed to layout the visible components contained in the specified target container.

7

Dimension preferredLayoutSize(Container target)
Returns the preferred dimensions for this layout given the visible components in the specified target container.

8

void removeLayoutComponent(Component comp)
Removes the specified component from the layout.

9

void setAlignment(int align)
Sets the alignment for this layout.

10

void setHgap(int hgap)
Sets the horizontal gap between components.

11

void setVgap(int vgap)
Sets the vertical gap between components.

12

String toString()
Returns a string representation of this FlowLayout object and its values.

方法繼承

這個類從以下類繼承的方法:

  • java.lang.Object

FlowLayout 例子

選擇使用任何編輯器創建以下java程序在 D:/ > SWING > com > yiibai > gui >

SwingLayoutDemo.java

package com.yiibai.gui; import java.awt.*; import java.awt.event.*; import javax.swing.*; public class SwingLayoutDemo { private JFrame mainFrame; private JLabel headerLabel; private JLabel statusLabel; private JPanel controlPanel; private JLabel msglabel; public SwingLayoutDemo(){ prepareGUI(); } public static void main(String[] args){ SwingLayoutDemo swingLayoutDemo = new SwingLayoutDemo(); swingLayoutDemo.showFlowLayoutDemo(); } private void prepareGUI(){ mainFrame = new JFrame("Java SWING Examples"); mainFrame.setSize(400,400); mainFrame.setLayout(new GridLayout(3, 1)); headerLabel = new JLabel("",JLabel.CENTER ); statusLabel = new JLabel("",JLabel.CENTER); statusLabel.setSize(350,100); mainFrame.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent windowEvent){ System.exit(0); } }); controlPanel = new JPanel(); controlPanel.setLayout(new FlowLayout()); mainFrame.add(headerLabel); mainFrame.add(controlPanel); mainFrame.add(statusLabel); mainFrame.setVisible(true); } private void showFlowLayoutDemo(){ headerLabel.setText("Layout in action: FlowLayout"); JPanel panel = new JPanel(); panel.setBackground(Color.darkGray); panel.setSize(200,200); FlowLayout layout = new FlowLayout(); layout.setHgap(10); layout.setVgap(10); panel.setLayout(layout); panel.add(new JButton("OK")); panel.add(new JButton("Cancel")); controlPanel.add(panel); mainFrame.setVisible(true); } }

編譯程序,使用命令提示符。到 D:/ > SWING 然後輸出以下命令。

D:SWING>javac comyiibaiguiSwingLayoutDemo.java

如果沒有錯誤出現,這意味着編譯成功。使用下面的命令來運行程序。

D:SWING>java com.yiibai.gui.SwingLayoutDemo

驗證下面的輸出

SWING