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Swing JCheckBox

JCheckBox的類是一個實現一個複選框 - 可以選擇或取消選擇一個項目,其狀態顯示給用戶。

類聲明

以下是聲明 javax.swing.JCheckBox類:

public class JCheckBox extends JToggleButton implements Accessible

字段域

以下是javax.swing.JCheckBox類字段域:

  • static String BORDER_PAINTED_FLAT_CHANGED_PROPERTY -- 扁平屬性標識的變化。

類構造函數

S.N.

構造函數 & 描述

1

JCheckBox()
Creates an initially unselected check box button with no text, no icon.

2

JCheckBox(Action a)
Creates a check box where properties are taken from the Action supplied.

3

JCheckBox(Icon icon)
Creates an initially unselected check box with an icon.

4

JCheckBox(Icon icon, boolean selected)
Creates a check box with an icon and specifies whether or not it is initially selected.

5

JCheckBox(String text)
Creates an initially unselected check box with text.

6

JCheckBox(String text, boolean selected)
Creates a check box with text and specifies whether or not it is initially selected.

7

JCheckBox(String text, Icon icon)
Creates an initially unselected check box with the specified text and icon.

8

JCheckBox(String text, Icon icon, boolean selected)
Creates a check box with text and icon, and specifies whether or not it is initially selected.

類方法

S.N.

方法 & 描述

1

AccessibleContext getAccessibleContext()
Gets the AccessibleContext associated with this JCheckBox.

2

String getUIClassID()
Returns a string that specifies the name of the L&F class that renders this component.

3

boolean isBorderPaintedFlat()
Gets the value of the borderPaintedFlat property.

4

protected String paramString()
Returns a string representation of this JCheckBox.

5

void setBorderPaintedFlat(boolean b)
Sets the borderPaintedFlat property, which gives a hint to the look and feel as to the appearance of the check box border.

6

void updateUI()
Resets the UI property to a value from the current look and feel.

方法繼承

這個類從以下類繼承的方法:

  • javax.swing.AbstractButton

  • javax.swing.JToggleButton

  • javax.swing.JComponent

  • java.awt.Container

  • java.awt.Component

  • java.lang.Object

JCheckBox 例子

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

SwingControlDemo.java

package com.yiibai.gui; import java.awt.*; import java.awt.event.*; import javax.swing.*; public class SwingControlDemo { private JFrame mainFrame; private JLabel headerLabel; private JLabel statusLabel; private JPanel controlPanel; public SwingControlDemo(){ prepareGUI(); } public static void main(String[] args){ SwingControlDemo swingControlDemo = new SwingControlDemo(); swingControlDemo.showCheckBoxDemo(); } private void prepareGUI(){ mainFrame = new JFrame("Java Swing Examples"); mainFrame.setSize(400,400); mainFrame.setLayout(new GridLayout(3, 1)); mainFrame.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent windowEvent){ System.exit(0); } }); headerLabel = new JLabel("", JLabel.CENTER); statusLabel = new JLabel("",JLabel.CENTER); statusLabel.setSize(350,100); controlPanel = new JPanel(); controlPanel.setLayout(new FlowLayout()); mainFrame.add(headerLabel); mainFrame.add(controlPanel); mainFrame.add(statusLabel); mainFrame.setVisible(true); } private void showCheckBoxDemo(){ headerLabel.setText("Control in action: CheckBox"); final JCheckBox chkApple = new JCheckBox("Apple"); final JCheckBox chkMango = new JCheckBox("Mango"); final JCheckBox chkPeer = new JCheckBox("Peer"); chkApple.setMnemonic(KeyEvent.VK_C); chkMango.setMnemonic(KeyEvent.VK_M); chkPeer.setMnemonic(KeyEvent.VK_P); chkApple.addItemListener(new ItemListener() { public void itemStateChanged(ItemEvent e) { statusLabel.setText("Apple Checkbox: " + (e.getStateChange()==1?"checked":"unchecked")); } }); chkMango.addItemListener(new ItemListener() { public void itemStateChanged(ItemEvent e) { statusLabel.setText("Mango Checkbox: " + (e.getStateChange()==1?"checked":"unchecked")); } }); chkPeer.addItemListener(new ItemListener() { public void itemStateChanged(ItemEvent e) { statusLabel.setText("Peer Checkbox: " + (e.getStateChange()==1?"checked":"unchecked")); } }); controlPanel.add(chkApple); controlPanel.add(chkMango); controlPanel.add(chkPeer); 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 comyiibaiguiSwingControlDemo.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.SwingControlDemo

驗證下面的輸出

Swing