java图形界面中的图片显示

1、java图形界面中的图片显示不好 2011-06-13 12:44 1203670773 | 分类：JAVA相关 | 浏览342次我在Java的JDialog中想添加一个图片想填充整个对话框，添加后的图片却显示不出来，然后在用鼠标东一下对话框，图片就显示出来了。怎么回事呀精彩回答2011-06-20 02:59package hao;import java.awt.BorderLayout;import java.awt.Color;import java.awt.Dimension;import java.awt.GridLayout;import java.io.File;import j

2、avax.swing.BorderFactory;import javax.swing.Box;import javax.swing.ImageIcon;import javax.swing.JButton;import javax.swing.JComboBox;import javax.swing.JLabel;import javax.swing.JPanel;import javax.swing.JScrollPane;import javax.swing.JTextArea;import javax.swing.JTextPane;import javax.swing.text.Ba

3、dLocationException;import javax.swing.text.SimpleAttributeSet;import javax.swing.text.StyleConstants;import javax.swing.text.StyledDocument;public class ChatPanel extends JPanel private static final long serialVersionUID = 1L; JButton send,record,saveRecord,image; JTextArea inputArea; JTextPane text

4、;/注意用法* JComboBox fontName = null, fontSize = null, fontStyle = null, fontColor = null,fontBackColor = null; public StyledDocument doc = null; JScrollPane scrollPane;JPanel textChat; JButton music; public ChatPanel() setLayout(new BorderLayout(); text = new JTextPane(); text.setEditable(false); doc

5、= text.getStyledDocument();/跟踪文本和图片写到该区域的位置* scrollPane = new JScrollPane(text); /注意下面对JComboBox的巧用* String str_name = ; String str_Size = ; String str_Style = ; String str_Color = ; String str_BackColor = ; fontName = new JComboBox(str_name); fontSize = new JComboBox(str_Size); fontStyle = new JCom

6、boBox(str_Style); fontColor = new JComboBox(str_Color); fontBackColor = new JComboBox(str_BackColor); fontName.setBackground(new Color(255,153,255); fontSize.setBackground(new Color(255,153,255); fontStyle.setBackground(new Color(255,153,255); fontColor.setBackground(new Color(255,153,255); fontBack

7、Color.setBackground(new Color(255,153,255); Box box = Box.createVerticalBox();/创建一个可以容纳多个Box组件的Box* Box box_1 = Box.createHorizontalBox(); Box box_2 = Box.createHorizontalBox(); Box box_4 = Box.createHorizontalBox(); box.add(box_1); box.add(box_2); box.add(box_4); JLabel b1= new JLabel("字体"

8、;), b2 = new JLabel("样式"),b3 = new JLabel("字号"),b4 = new JLabel("颜色"),b5 = new JLabel("背景"); b1.setBackground(new Color(255,153,255); b2.setBackground(new Color(255,153,255); b3.setBackground(new Color(255,153,255); b4.setBackground(new Color(255,153,255); b5.

9、setBackground(new Color(255,153,255); box_1.add(b1); box_1.add(fontName); box_1.add(Box.createHorizontalStrut(8); box_1.add(b2); box_1.add(fontStyle); box_1.add(Box.createHorizontalStrut(8); box_1.add(b3); box_1.add(fontSize); box_2.add(Box.createHorizontalStrut(8); box_2.add(b4); box_2.add(fontColo

10、r); box_2.add(Box.createHorizontalStrut(8); box_4.add(b5); box_4.add(fontBackColor);textChat = new JPanel(); textChat.setLayout(new BorderLayout(); textChat.setBackground(new Color(255,153,255); inputArea = new JTextArea(3, 20); inputArea.setLineWrap(true); /设置文本区的换行策略。88888*send = new JButton("

11、;发送"); record=new JButton("显示记录"); saveRecord=new JButton("储存记录"); image=new JButton("表情"); send.setBackground(new Color(255,153,255); record.setBackground(new Color(255,153,255); saveRecord.setBackground(new Color(255,153,255); image.setBackground(new Color(255,15

12、3,255); Box box_3 = Box.createHorizontalBox(); box_3.add(send); box_3.add(Box.createHorizontalStrut(8);/设置按钮间距*888 box_3.add(record); box_3.add(Box.createHorizontalStrut(8); /设置按钮间距*888 box_3.add(saveRecord); box_3.add(Box.createHorizontalStrut(8);/设置按钮间距*888 box_3.add(image); box.setBorder(BorderFa

13、ctory.createLineBorder(new Color(102,102,0),5);/设置Box的边框线* box_3.setBorder(BorderFactory.createLineBorder(new Color(102,102,0),5); textChat.add(box,BorderLayout.NORTH); textChat.add(inputArea,BorderLayout.CENTER); textChat.add(box_3, BorderLayout.SOUTH); inputArea.requestFocus(true); inputArea.setBo

14、rder(BorderFactory.createLineBorder(new Color(102,102,0),5);/设置输入窗口边框线* text.setBorder(BorderFactory.createLineBorder(new Color(102,102,0),8);/设置输入窗口边框线* JPanel audioPanel = new JPanel();/最上面的边框* audioPanel.setBackground(new Color(255,153,255); audioPanel.setLayout(new GridLayout(1,1); music = new J

15、Button("想听就听"); music.setPreferredSize(new Dimension(320,50); music.setBorder(BorderFactory.createLineBorder(Color.BLACK,10);/设置输入窗口边框线* audioPanel.add(music);add(audioPanel, BorderLayout.NORTH); add(scrollPane,BorderLayout.CENTER); add(textChat, BorderLayout.SOUTH); void insertIcon(ImageI

16、con image) text.setCaretPosition(doc.getLength(); text.insertIcon(image); insert(new MessageStyle();/?/ public void insert(MessageStyle attrib) try doc.insertString(doc.getLength(), attrib.getText() + "n", attrib.getAttrSet();/写完后接着换行* catch (BadLocationException e) e.printStackTrace(); pu

17、blic MessageStyle getMessageStyle(String line) MessageStyle att = new MessageStyle(); att.setText(line); att.setName(String) fontName.getSelectedItem(); att.setSize(Integer.parseInt(String) fontSize.getSelectedItem(); String temp_style = (String) fontStyle.getSelectedItem(); if (temp_style.equals(&q

18、uot;常规") att.setStyle(MessageStyle.GENERAL); else if (temp_style.equals("粗体") att.setStyle(MessageStyle.BOLD); else if (temp_style.equals("斜体") att.setStyle(MessageStyle.ITALIC); else if (temp_style.equals("粗斜体") att.setStyle(MessageStyle.BOLD_ITALIC); String temp_

19、color = (String) fontColor.getSelectedItem(); if (temp_color.equals("黑色") att.setColor(new Color(0, 0, 0); else if (temp_color.equals("红色") att.setColor(new Color(255, 0, 0); else if (temp_color.equals("蓝色") att.setColor(new Color(0, 0, 255); else if (temp_color.equals("黄色") att.setColor(new Color(255, 255, 0); else