• Event: An event is a signal to the program that something has happened. It can be triggered by typing in a text field, selecting an item from the menu etc. The action is initiated outside the scope of the program and it is handled by a piece of code
* FocusEventDemo.java * */importjava.util.Vector;importjava.awt.*;importjava.awt.event.*;importjavax.swing.*;publicclassFocusEventDemoextendsJFrameimplementsFocusListener{finalstaticString newline="\n";JTextArea display;publicFocusEventDemo(String name){super(name);}publicvoidaddComponentsToPane(final...
Java Swing(七):鼠标事件MouseEvent 鼠标事件MouseEvent 可以给控件/界面添加鼠标事件有三种监听器: 1.addMouseListener 点击,按住,抬起,移入,移出 2.addMouseMotionListener 移动,拖动 3.addMouseWheelListener 鼠标滚轮转动 MouseListener接口下要覆盖五个方法:mouseClicked,mouseEntered,mouseExited,mousePressed,mouseRelease...
确保功能完整性：导入javax.swing.event包是确保你的Swing程序能够正确处理Swing组件事件的关键步骤之一。没有导入这个包，你的程序可能无法编译或运行，因为它将无法识别和处理这些事件。因此，在编写涉及事件处理的Swing程序时，记得在Java源文件的开头添加import javax.swing.event.*;语句。
Event Handling ExampleCreate the following Java program using any editor of your choice in say D:/ > SWING > com > tutorialspoint > gui >SwingControlDemo.javapackage com.tutorialspoint.gui; import java.awt.*; import java.awt.event.*; import javax.swing.*; public class SwingControlDemo { ...
importjava.awt.event.MouseEvent;importjava.awt.event.MouseListener;importjavax.swing.JButton;importjavax.swing.JFrame;importjavax.swing.JTextArea;importjavax.swing.JTextField;//作为MouseEvent事件的监听器,需要实现接口中的5个方法publicclassMousePoliceimplementsMouseListener{ ...
* FocusEventDemo.java * */ import java.util.Vector; import java.awt.*; import java.awt.event.*; import javax.swing.*; public class FocusEventDemo extends JFrame implements FocusListener { final static String newline = "\n"; JTextArea display; ...
javax.swing.colorchooser中ChangeEvent的使用 javax.swing.event中ChangeEvent的使用 参数类型为ChangeEvent的javax.swing.event中的方法 voidTableColumnModelListener.columnMarginChanged(ChangeEvente) 告知侦听器因为页边空白更改,有一列被移除。 voidCellEditorListener.editingCanceled(ChangeEvente) ...
SwingPropertyChangeSupport java.beans.PropertyChangeSupport这个子类功能几乎相同。 TreeExpansionEvent 用于标识树中单个路径的事件。 TreeModelEvent 将描述更改的信息封装到树模型,并用于通知树型模型侦听器的更改。 TreeModelListener 定义侦听TreeModel中更改的对象的接口。 TreeSelectionEvent 表示当前选择的...
import javax.swing.* ; import java.awt.*; import java.awt.event.*; /* */ public class ex10_3 extends JApplet JButton jb = new JButton("Add Text"); JTextPane itp = new JTextPane(); public void init() jb.addActionListener(new ActionListener() public void actionPerformed(ActionEve...