博文
SwingSpeciality用法(2005-09-22 17:22:00)
摘要：/*此程序演示Swing的特性 JComponent类的特殊功能又分为：
1) 边框设置：使用setBorder()方法可以设置组件外围的边框，使用一个EmptyBorder对象能在组件周围留出空白。
2) 双缓冲区：使用双缓冲技术能改进频繁变化的组件的显示效果。与AWT组件不同，JComponent组件默认双缓冲区，不必自己重写代码。如果想关闭双缓冲区，可以在组件上施加setDoubleBuffered(false)方法。
3) 提示信息：使用setTooltipText()方法，为组件设置对用户有帮助的提示信息。
4) 键盘导航：使用registerKeyboardAction( ) 方法，能使用户用键盘代替鼠标来驱动组件。JComponent类的子类AbstractButton还提供了便利的方法－－用setMnemonic( )方法指明一个字符，通过这个字符和一个当前L&F的特殊修饰共同激活按钮动作。
5) 可插入L&F：每个Jcomponent对象有一个相应的ComponentUI对象，为它完成所有的绘画、事件处理、决定尺寸大小等工作。 ComponentUI对象依赖当前使用的L&F,用UIManager.setLookAndFeel( )方法可以设置需要的L&F.
6) 支持布局：通过设置组件最大、最小、推荐尺寸的方法和设置X、Y对齐参数值的方法能指定布局管理器的约束条件，为布局提供支持。
另外还有菜单的使用方法*/import java.awt.*;import java.io.File;import java.awt.event.*;import javax.swing.*;import javax.swing.event.MenuKeyEvent;import javax.swing.event.MenuKeyListener;
public class SwingSpecialityDemo{ public static void main(String args[]) { try{UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());}ca......
PrintStream用法(2005-09-22 17:21:00)
摘要：import java.io.*;
public class PrintStreamDemo{ public static void main(String[] args)throws IOException { try { FileInputStream fis = new FileInputStream (FileDescriptor.in);//指定输入流为键盘 PrintStream ps = new PrintStream (new FileOutputStream ("D://testfile//file.log"), true); int is; while ((is=fis.read()) != -1)ps.println((char)is); fis.close(); ps.close(); } catch(FileNotFoundException e) { System.out.println(e); } catch(IOException e) { System.out.println(e); } catch(Exception e) { System.out.println(e); } }}......
OutputStreamWriter用法(2005-09-22 17:21:00)
摘要：example2:OutputStreamWriterDemo.java/************************************************************************以FileOutputStreamDemo.java为摸板，按回车后再按Ctrl+z结束输入，可输入中文************************************************************************/import java.io.*;
public class OutputStreamWriterDemo{ public static void main(String[] args)throws IOException { try { InputStreamReader isr = new InputStreamReader (new FileInputStream (FileDescriptor.in)); OutputStreamWriter osw = new OutputStreamWriter (new FileOutputStream ("D://testfile//output.log")); int is; while ((is=isr.read()) != -1)osw.write(is); isr.close(); osw.close();
} catch(FileNotFoundException e) { System.out.println(e); } catch(IOException e) { System.out.println(e); }&nbs......
Layout用法(2005-09-22 17:20:00)
摘要：import java.awt.FlowLayout;import java.awt.GridLayout;import java.awt.BorderLayout;import java.awt.Color;import java.awt.Dimension;import javax.swing.ImageIcon;import javax.swing.Box;import javax.swing.SwingConstants;import javax.swing.BoxLayout;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JPanel;import javax.swing.JTabbedPane;import javax.swing.JButton;import java.awt.event.*;
public class LayoutDemo{ public static void main(String[] args) { JFrame frame = new JFrame ("Layout Manager Demo"); frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE); JTabbedPane tp = new JTabbedPane(); tp.addTab ("Flow",new FlowPanel()); tp.addTab ("Border",new BorderPanel()); tp.addTab ("Grid",new GridPanel()); tp.addTab ("Box",new BoxPanel()); frame.setContentPane(tp); frame.pack(); frame.show(); }}
//定义流式布局管理器class FlowPanel exte......
JTree用法(2005-09-22 17:20:00)
摘要：import java.awt.Dimension;import java.awt.Color;import javax.swing.JFrame;import javax.swing.JPanel;import javax.swing.JScrollPane;import javax.swing.JTree;import javax.swing.BoxLayout;import javax.swing.tree.TreePath;import javax.swing.tree.DefaultMutableTreeNode;import javax.swing.tree.DefaultTreeModel;/*JTree的构造函数:JTree()JTree(Hashtable value)JTree(Object[] value)//只有这个构造函数可以创建多个根结点JTree(TreeModel newModel)JTree(TreeNode root)JTree(TreeNode root, boolean asksAllowsChildren)JTree(Vector value)
*/public class JTreeDemo{ public static void main (String[] args) {
//构造函数：JTree() JTree example1 = new JTree();
//构造函数：JTree(Object[] value) Object[] letters= {"a", "b", "c", "d", "e"}; JTree example2 = new JTree (letters);
//构造函数：JTree(TreeNode root)(TreeNode空) //用空结点创建树 DefaultMutableTreeNode node1 = new DefaultMutableTreeNode();//定义树结点 JTree example......
JTextArea用法(2005-09-22 17:19:00)
摘要：import java.awt.Color;import java.awt.Font;import java.awt.Point;import java.awt.Dimension;import javax.swing.BorderFactory;import javax.swing.JScrollPane;import javax.swing.JTextArea;import javax.swing.JFrame;import javax.swing.ImageIcon;public class JTextAreaDemo{ public static void main(String[] args) { try{javax.swing.UIManager.setLookAndFeel(javax.swing.UIManager.getSystemLookAndFeelClassName());}catch(Exception e){} JTextArea ta = new JTextArea(20,20); ta.setBorder (BorderFactory.createEmptyBorder (1,1,1,5)); ta.setColumns (0); ta.setRows (0);//相当于设置文本区组件的初始大小,并不是说一行只能写0个字符; ta.setLineWrap (false);//设置为禁止自动换行,初始值为false. ta.setTabSize (4);//设置制表符的大小为8个字符,初始值为4个字符 ta.setWrapStyleWord (true); ta.setBackground (Color.white);//文本区背景 ta.setForeground (Color.red);//字体颜色 ta.setFont (new Font ("SansSerif", Font.PLAIN, 14)); JScroll......
JTable用法(2005-09-22 17:19:00)
摘要：import java.awt.Dimension;import javax.swing.JFrame;import javax.swing.JScrollPane;import javax.swing.JPanel;import javax.swing.JTable;import java.awt.Color;import java.awt.GridLayout;import javax.swing.table.TableColumn;
public class JTableDemo{ public static void main (String[] args) { /* 构造函数有很多下面先介绍几个: JTable() JTable(int numRows, int numColumns) JTable(Object[][] rowData, Object[] columnNames) */ JTable example1 = new JTable ();//看不到但存在 JTable example2 = new JTable (8, 6); final Object[] columnNames = {"姓名", "性别", "家庭地址",//列名最好用final修饰 "电话号码", "生日", "工作", "收入", "婚姻状况","恋爱状况"}; Object[][] rowData = { {"ddd", "男", "江苏南京", "1378313210", "03/24/1985", "学生", "寄生中", "未婚", "没"}, {"eee", "女", "江苏南京", "13645181705", "xx/xx/1985", "家教", "未知", "未婚", "好象没"},......
JTabbedPane用法(2005-09-22 17:18:00)
摘要：import java.awt.FlowLayout;import java.awt.GridLayout;import java.awt.BorderLayout;import java.awt.Color;import java.awt.Dimension;import javax.swing.BoxLayout;import javax.swing.JTabbedPane;import javax.swing.JPanel;import javax.swing.JFrame;import javax.swing.JButton;import javax.swing.ImageIcon;import javax.swing.UIManager;
class TabPane extends JTabbedPane{ JPanel panel1, panel2, panel3, panel4, panel5; public TabPane () { //super (a, b); panel1 = new JPanel (); panel1.add(new JButton()); panel2 = new JPanel (new BorderLayout()); panel3 = new JPanel (true); panel4 = new JPanel (new GridLayout(2,3)); panel5 = new JPanel (new FlowLayout(FlowLayout.LEFT, 1, 0)); //以上是JPanel的四种构造方法 //窗体布局器有四种设置： //new BorderLayout () or new BorderLayout (int hgap, int vgap) //new GridLayout () or new GridLayout (int rows, int cols) new GridLayout (int rows, int ......
JTabbeld用法(2005-09-18 17:23:00)
摘要：import java.awt.FlowLayout;import java.awt.GridLayout;import java.awt.BorderLayout;import java.awt.Color;import java.awt.Dimension;import javax.swing.BoxLayout;import javax.swing.JTabbedPane;import javax.swing.JPanel;import javax.swing.JFrame;import javax.swing.JButton;import javax.swing.ImageIcon;import javax.swing.UIManager;
class TabPane extends JTabbedPane{ JPanel panel1, panel2, panel3, panel4, panel5; public TabPane () { //super (a, b); panel1 = new JPanel (); panel1.add(new JButton()); panel2 = new JPanel (new BorderLayout()); panel3 = new JPanel (true); panel4 = new JPanel (new GridLayout(2,3)); panel5 = new JPanel (new FlowLayout(FlowLayout.LEFT, 1, 0)); //以上是JPanel的四种构造方法 //窗体布局器有四种设置： //new BorderLayout () or new BorderLayout (int hgap, int vgap) //new GridLayout () or new GridLayout (int rows, int cols) new GridLayout (int rows, int ......
JSplitPane用法(2005-09-18 17:23:00)
摘要：import javax.swing.*;import java.awt.Dimension;public class JSplitPaneDemo{ public static void main (String[] args) { JButton button = new JButton ("button"); JLabel label = new JLabel ("label"); JSplitPane splitPane = new JSplitPane (); splitPane.setOneTouchExpandable (true);//是该分隔面板的分隔条显示出箭头 splitPane.setContinuousLayout (true); splitPane.setPreferredSize (new Dimension (500,600));//设置大小 splitPane.setOrientation (JSplitPane.HORIZONTAL_SPLIT); splitPane.setLeftComponent (button);//same as: splitPane.setTopComponent(button); splitPane.setRightComponent (label);//same as: splitPane.setBottomComponent(label); splitPane.setDividerSize (5);//设置分隔条的粗细 splitPane.setDividerLocation(200);//设置分隔条的位置，基于setPreferredSize方法中的值， //此处为200/500，大概在中间靠左
JFrame frame = new JF......