博文
JRadioButton用法(2005-09-18 17:22:00)
摘要：import javax.swing.JPanel;import javax.swing.JFrame;import javax.swing.JRadioButton;import javax.swing.ButtonGroup;import java.awt.Dimension;import java.awt.Color;import java.awt.FlowLayout;
public class JRadioButtonDemo{ public static void main(String[] args) { JRadioButton red, white, cyan; red = new JRadioButton ("red"); white = new JRadioButton ("white"); cyan = new JRadioButton ("cyan"); ButtonGroup group = new ButtonGroup (); group.add (red); group.add (white); group.add (cyan); JPanel panel = new JPanel (new FlowLayout (FlowLayout.CENTER, 1, 0)); panel.setBackground (Color.white); panel.setPreferredSize (new Dimension (200,50)); panel.add (red); panel.add (white); panel.add (cyan); JFrame frame = new JFrame("JRadioButtonDemo"); frame.setDefaultCloseOpera......
JProgressBar用法(2005-09-18 17:21:00)
摘要：import java.awt.Color;import javax.swing.JProgressBar;import javax.swing.JFrame;import javax.swing.JPanel;import java.awt.Dimension;import java.awt.FlowLayout;
public class JProgressBarDemo{ public static void main (String[] args) { JProgressBar progressBar = new JProgressBar (JProgressBar.VERTICAL, 10, 100); progressBar.setBackground (Color.white); progressBar.setForeground (Color.red); progressBar.setValue (40); progressBar.setString ("progressBar"); JPanel panel = new JPanel (new FlowLayout (FlowLayout.LEFT)); panel.setPreferredSize (new Dimension (600,400)); panel.add (progressBar); JFrame frame = new JFrame ("JProgressBarDemo"); frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE); frame.setContentPane (panel); frame.pack(); frame.show(); }}......
JOptionPane用法(2005-09-17 01:07:00)
摘要：package hu.demos;import javax.swing.JOptionPane;import javax.swing.ImageIcon;import javax.swing.Icon;public class JOptionPaneDemo{ public static void main(String[] args) { Icon icon = new ImageIcon("QQ.png"); int confirmMessage; Object[] possibleValues = {"First", "Second", "Third"}; Object inputMessage; //----------------------------------------------------------------- // Usage: // method: static String/Object | showInputDialog(Xxx) //----------------------------------------------------------------- /*1 showInputDialog(Object message); */// inputMessage = JOptionPane.showInputDialog ("Input a Integer:"); /*2 showInputDialog(Object message, Object initialSelectionValue) */// inputMessage = JOptionPane.showInputDialo......
JMenuBar用法(2005-09-17 01:01:00)
摘要：//JMenu 继承自JMenuItem，它们都在javax.swing包中，都实现了Accessible, MenuElement 接口import java.awt.Color;import javax.swing.JFrame;import javax.swing.JMenuBar;import javax.swing.JMenu;import javax.swing.JMenuItem;import javax.swing.JPanel;import java.awt.Dimension;import java.awt.MenuShortcut;
public class JMenuBarDemo{ public static void main (String[] args) { //try{javax.swing.UIManager.setLookAndFeel(javax.swing.UIManager.getSystemLookAndFeelClassName());}catch(Exception e){} JPanel panel = new JPanel (); panel.setBackground (Color.white); panel.setPreferredSize (new Dimension (600,400)); //JMenu 有箭头(除了顶层的)，可以添加JMenu和JMenuItem; //JMenuItem 无箭头，不可添加其他菜单项 JMenu file, edit, search, item, view, format, macro, advance, windows, help; file = new JMenu ("File"); edit = new JMenu ("Edit"); search = new JMenu ("Search", true); item = new JMenu ("Item"); view = new ......
JList用法(2005-09-17 00:59:00)
摘要：import javax.swing.JFrame;import javax.swing.JSplitPane;import javax.swing.JLabel;import java.awt.Component;import java.awt.Dimension;import java.awt.FlowLayout;import java.awt.Color;import javax.swing.JList;import javax.swing.BorderFactory;
public class JListDemo{ public static void main(String[] args) { String[] names = {"孙中山", "袁世凯", "毛泽东", "蒋介石", "邓小平", "天安门"}; JList list = new JList (names); list.setBorder (BorderFactory.createEtchedBorder()); list.setFixedCellHeight (30);//设置每个选项的高度 list.setFixedCellWidth (70);//设置每个选项的宽度，一般不需要 list.setDragEnabled (true); list.setBackground (Color.cyan); list.setForeground (Color.red); list.setSelectionBackground (Color.white); list.setSelectionForeground (Color.black); list.setLayoutOrientation (JList.HORIZONTAL_WRAP); JLabel label = new JLabel("blank"); JSplitPane panel = new JSpli......
JFrame用法(2005-09-17 00:58:00)
摘要：import java.awt.*;import javax.swing.*;
public class JFrameDemo extends Frame{ public static void main(String[] args) { JFrameDemo frame = new JFrameDemo ("My Frame"); frame.setSize(200,200); frame.setBackground(Color.red); frame.setLayout(null); frame.setVisible(true); Panel panel = new Panel(); panel.setSize(100, 100); panel.setBackground(Color.yellow); frame.add(panel); //frame.show(); } public JFrameDemo (String str) { super(str); }}......
JComboBox用法(2005-09-17 00:57:00)
摘要：//组合框的选项是对象,不一定是字符串,比如可以显示图象,但最好不要将字符串和图象混合了放在一个组合框里
import javax.swing.JFrame;import javax.swing.JPanel;import javax.swing.JComboBox;import javax.swing.UIManager;import java.awt.Component;import java.awt.Dimension;import java.awt.FlowLayout;import javax.swing.ImageIcon;
public class JComboBoxDemo{ public static void main(String[] args) { try {UIManager.setLookAndFeel (UIManager.getSystemLookAndFeelClassName ());}catch(Exception e){} String[] names = {"孙中山", "袁世凯", "毛泽东", "蒋介石", "邓小平", "天安
门"}; MyBox equals = new MyBox (names); equals.addItem ("游神"); equals.addItem ("猪头"); MyBox images = new MyBox (); images.addItem (new ImageIcon ("Image//QQ.png")); images.addItem (new ImageIcon ("Image//fairy.gif")); JPanel panel = new JPanel(new FlowLayout (FlowLayout.CENTER, 0, 1)); panel.setPreferredSize (new Dimension (300,100)); panel.add (......
JColorChooser用法(2005-09-17 00:55:00)
摘要：import java.awt.Dimension;import javax.swing.JColorChooser;import java.awt.Color;import javax.swing.JFrame;import javax.swing.JPanel;import java.awt.event.ActionListener;import java.awt.event.ActionEvent;import javax.swing.JButton;import java.awt.FlowLayout;
public class JColorChooserDemo implements ActionListener{ public static void main(String[] args) { JFrame frame = new JFrame ("JColorChooserDemo"); frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE); MyPanel panel = new MyPanel(); frame.getContentPane ().add (panel); frame.pack(); frame.show(); } public void actionPerformed(ActionEvent e) { }}
class MyPanel extends JPanel implements ActionListener{ private JButton button, rgb, red, green, blue; private Color color = new Color (0, 0, 0); public MyPanel() { button = new JButton ("Get Color"); rgb = new JButton ("RGB: "); ......
IOStream用法(2005-09-16 19:03:00)
摘要：/*I/O流的层次 1．字节流 2．字符流 3．对象流 4．其它
详细介绍：---------------------------------------1．字节流：
从InputStream和OutputStream派生出来的一系列类。这类流以字节(byte)为基本处理单位。 ◇ InputStream、OutputStream ◇ FileInputStream、FileOutputStream ◇ PipedInputStream、PipedOutputStream ◇ ByteArrayInputStream、ByteArrayOutputStream ◇ FilterInputStream、FilterOutputStream ◇ DataInputStream、DataOutputStream ◇ BufferedInputStream、BufferedOutputStream---------------------------------------InputStream 和OutputStream
InputStream 和OutputStream 是其他字节流的父类，他是一个抽象类，各有一个抽象方法：abstract int read()和abstract write(int b);
InputStream:
◇ 从流中读取数据：
int read( ); //读取一个字节，返回值为所读的字节
int read( byte b[ ] ); //读取多个字节，放置到字节数组b中，通常 //读取的字节数量为b的长度，返回值为实际 //读取的字节的数量
int read( byte b[ ], int off, int len ); //读取len个字节，放置 &nb......
InputStreamReader用法(2005-09-16 19:02:00)
摘要：//与FileInputStream几乎一样，唯一不同的是他可以读取16为的Unicode字符，如汉字等。import java.io.*;
public class InputStreamReaderDemo{ public static void main(String[] args)throws IOException { try { int b; InputStreamReader isr = new InputStreamReader (new FileInputStream (new File ("D://testfile//input.log"))); System.out.println ("The content of text is:"); while ((b = isr.read()) != -1)//顺序读取文件text里的内容并赋值给整型变量b,直到文件结束为止。 { System.out.print((char)b); } isr.close(); } catch(FileNotFoundException e) { System.out.println(e); } catch(IOException e) { System.out.println(e); } catch(Exception e) { System.out.println(e); } }}......