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GUI
定义规则:
大小:先水平、后垂直;先宽、后高(单位像素)
位置:原点:x:0/y:0(原点定位于左上角)
窗体关闭即退出:
1. 界面元素:(1)容器:
(2)组件:
2.布局——嵌套布局
3.事件处理
标题栏占25, 设置窗体面板大小是减去标题栏的内容面板 this.setSize(500, 400);//设置窗体大小--像素
SWT开发:
Java.awt包(关于界面类):容器类与组件类:带外观(过时不在使用)
工具类:颜色类、字体类
Java.swing包:容器类与组件类(带Jxxxx)
界面元素:(1)容器:4种首层容器:Jwindow(最原始容器)/JFrame(原始容器升级版)/JDialog(对话框)/JApplet(Java小应用程序);
(2)组件:标签;文本框(密码框);按钮;下拉列表;单选;复选;文本域
容器类JFrame:
public class MyFrame extends JFrame{ private Container contentP;//内容面板 private JLabel msgLab;//文字标签 private JLabel imgLab;//图片标签 private JTextField usernameTxt;//文本框 private JPasswordField pwdTxt;//密码框 private JButton okBtn;//按钮 private JButton getMoentyBtn;//取钱按钮 private JComboBox<String> teacherCmb;//下拉列表 private JTextArea selfArea;//文本域 private JRadioButton maleRad;//单选框 private JRadioButton femaleRad; private JCheckBox hobbitBox;//复选框 public MyFrame(){ Toolkit tk = Toolkit.getDefaultToolkit();//获取工具对象 int screenWidth = (int)tk.getScreenSize().getWidth(); int screenHeight = (int)tk.getScreenSize().getHeight(); this.setSize(500, 400);//设置窗体大小--像素 this.setLocation((screenWidth-500)/2, (screenHeight-400)/2);//设置窗体的位置 this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//设置窗体关闭即退出程序 this.setTitle("我的第一个GUI窗体");//标题栏设置标题 this.setIconImage(tk.createImage("image/icon.png"));//设置标题栏图标 this.setResizable(false);//设置窗体改变大小的能力 this.addContent(); this.setVisible(true);//设置该窗体可见 } private void addContent(){ this.contentP = this.getContentPane();//获取内容面板 this.contentP.setBackground(Color.WHITE);//设置窗体背景色 this.contentP.setLayout(null);//设置布局管理器为null---代表放入该容器的组件的大小位置全靠自定义 //文本标签 this.msgLab = new JLabel("用户名:");//产生对象 this.msgLab.setText("用户名:"); // this.msgLab.setBorder(BorderFactory.createLineBorder(Color.BLACK));//给标签设置边框--调试用 this.msgLab.setFont(new Font("微软雅黑",Font.BOLD,16));//设置字体 this.msgLab.setForeground(new Color(82,254,211));//设置字体颜色 this.msgLab.setBounds(100, 20, 80, 30);//设置大小位置 this.contentP.add(this.msgLab);//放入容器 //图片标签 this.imgLab = new JLabel(new ImageIcon("image/fish.jpg")); this.imgLab.setBounds(200, 20, 243, 167); this.contentP.add(this.imgLab); //文本框 this.usernameTxt = new JTextField(); this.usernameTxt.setBounds(20, 70, 100, 30); this.usernameTxt.setFont(new Font("微软雅黑",Font.BOLD,16));//设置字体 this.usernameTxt.setForeground(new Color(82,254,211));//设置字体颜色 // this.usernameTxt.setEditable(false);//设置文本框不可编辑 this.contentP.add(this.usernameTxt); //密码框 this.pwdTxt = new JPasswordField(); this.pwdTxt.setEchoChar(‘*‘); this.pwdTxt.setFont(new Font("微软雅黑",Font.BOLD,16));//设置字体 this.pwdTxt.setForeground(new Color(82,254,211));//设置字体颜色 this.pwdTxt.setBounds(20, 120, 100, 30); this.contentP.add(this.pwdTxt); //按钮 this.okBtn = new JButton("确定"); this.okBtn.setText("确定"); this.okBtn.setFont(new Font("微软雅黑",Font.BOLD,16));//设置字体 this.okBtn.setForeground(new Color(82,254,211));//设置字体颜色 this.okBtn.setBounds(20, 160, 100, 30); this.contentP.add(this.okBtn); this.getMoentyBtn = new JButton(new ImageIcon("image/buttonGet.jpg")); this.getMoentyBtn.setBounds(20, 200, 140, 50); this.contentP.add(this.getMoentyBtn); //下拉列表 this.teacherCmb = new JComboBox<String>(); this.teacherCmb.addItem("周春艳"); this.teacherCmb.addItem("刘弯弯"); this.teacherCmb.addItem("万洁"); this.teacherCmb.addItem("张欣"); this.teacherCmb.addItem("何茹薇"); this.teacherCmb.setEditable(true);//设置为可编辑为true this.teacherCmb.setBounds(20, 260, 100, 20); this.contentP.add(this.teacherCmb); //文本域 this.selfArea = new JTextArea(); JScrollPane scrollP = new JScrollPane(this.selfArea); scrollP.setBounds(200, 200, 280, 160); this.contentP.add(scrollP); //单选框 this.maleRad = new JRadioButton("男"); this.femaleRad = new JRadioButton("女"); this.maleRad.setBounds(20, 290, 50, 25); this.femaleRad.setBounds(80, 290, 50, 25); this.maleRad.setBackground(Color.WHITE); this.femaleRad.setBackground(Color.WHITE); this.maleRad.setSelected(true);//设置默认选中 this.contentP.add(this.maleRad); this.contentP.add(this.femaleRad); ButtonGroup bGroup = new ButtonGroup();//按钮分组 bGroup.add(this.maleRad); bGroup.add(this.femaleRad); //复选框 this.hobbitBox = new JCheckBox("兴趣爱好"); this.hobbitBox.setBounds(20, 325, 100, 25); this.contentP.add(this.hobbitBox); } }
public static void main(String[] args) { // TODO Auto-generated method stub //容器类JFrame MyFrame frame = new MyFrame(); }
布局layut:
最常用的4种布局管理器:“只要使用布局管理器,任何自定义布局无法使用”
1.边界布局(应用最多):BorderFrame:
布局方式:把整个容器划分为5个部分:东西南北中,南北要贯通,中间最大(不仅是中间的范围最大,权利也最大“周边不存在的时候,中间会占领周边”),当中间不存在的时候周边也不能占领中间;
使用场景:不是用来直接放组件的,而是用来放置子容器(中间容器)的;
public class BorderFrame extends JFrame { private Container contentP;//内容面板 private JButton btn1; private JButton btn2; private JButton btn3; private JButton btn4; private JButton btn5; public BorderFrame(){ Toolkit tk = Toolkit.getDefaultToolkit();//获取工具对象 int screenWidth = (int)tk.getScreenSize().getWidth(); int screenHeight = (int)tk.getScreenSize().getHeight(); this.setSize(500, 400);//设置窗体大小--像素 this.setLocation((screenWidth-500)/2, (screenHeight-400)/2);//设置窗体的位置 this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//设置窗体关闭即退出程序 this.setTitle("我的第一个GUI窗体");//标题栏设置标题 this.setIconImage(tk.createImage("image/icon.png"));//设置标题栏图标 this.setResizable(false);//设置窗体改变大小的能力 this.addContent(); this.setVisible(true);//设置该窗体可见 } private void addContent(){ this.contentP = this.getContentPane();//获取内容面板 this.contentP.setBackground(Color.WHITE);//设置窗体背景色 this.contentP.setLayout(new BorderLayout());//设置布局管理器为边界布局管理器---在默认的情况下,JFrame的内容面板就是边界布局 this.btn1 = new JButton("button1"); this.btn2 = new JButton("button2"); this.btn3 = new JButton("button3"); this.btn3.setFont(new Font("宋体",Font.BOLD,28)); this.btn4 = new JButton("button4"); this.btn5 = new JButton("button5button5"); this.contentP.add(this.btn1);//直接add就是默认往中间放 this.contentP.add(BorderLayout.NORTH, this.btn2); this.contentP.add(BorderLayout.SOUTH,this.btn3); this.contentP.add(BorderLayout.EAST,this.btn4); this.contentP.add(BorderLayout.WEST,this.btn5); } }
public static void main(String[] args) { // TODO Auto-generated method stub BorderFrame bframe = new BorderFrame(); }
2.流布局:FlowFrame:
布局方式:按从左往右,从上往下,由中间开始的方式依次排放组件;
组件大小要根据组件内容那个确定;
组件的位置随着容器大小的改变而改变;
使用场景:流布局是用来放置组件的,而不是用来放中间容器的;最好只做单行布局;
public class FlowFrame extends JFrame { private Container contentP;//内容面板 private JButton btn1; private JButton btn2; private JButton btn3; private JButton btn4; private JButton btn5; private JTextField inputTxt; public FlowFrame(){ Toolkit tk = Toolkit.getDefaultToolkit();//获取工具对象 int screenWidth = (int)tk.getScreenSize().getWidth(); int screenHeight = (int)tk.getScreenSize().getHeight(); this.setSize(500, 400);//设置窗体大小--像素 this.setLocation((screenWidth-500)/2, (screenHeight-400)/2);//设置窗体的位置 this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//设置窗体关闭即退出程序 this.setTitle("我的第一个GUI窗体");//标题栏设置标题 this.setIconImage(tk.createImage("image/icon.png"));//设置标题栏图标 this.setResizable(true);//设置窗体改变大小的能力 this.addContent(); this.setVisible(true);//设置该窗体可见 }
private void addContent(){ this.contentP = this.getContentPane();//获取内容面板 this.contentP.setBackground(Color.WHITE);//设置窗体背景色 this.contentP.setLayout(new FlowLayout());//设置布局管理器为流布局管理器 this.btn1 = new JButton("button1"); this.btn2 = new JButton("button2"); this.btn3 = new JButton("button3"); this.btn3.setFont(new Font("宋体",Font.BOLD,28)); this.btn4 = new JButton("button4"); this.btn5 = new JButton("button5button5"); this.inputTxt = new JTextField(); this.inputTxt.setColumns(10); this.add(this.btn1); this.add(this.btn2); this.add(this.btn3); this.add(this.btn4); this.add(this.btn5); this.add(this.inputTxt); } }
public static void main(String[] args) { // TODO Auto-generated method stub FlowFrame fFrame = new FlowFrame(); }
3.网格布局:GridFrame:
布局方式:按行列将整个容器划分为等大的区域,放入的子容器的数目如果与设置的数目不等,优先保证行改变列
使用场景:不是用来放置组件的,而是用来放置容器(中间容器)的。
使用场景:不是用来放置组件的,而是用来放置容器(中间容器)的。
public class GridFrame extends JFrame { private Container contentP;//内容面板 private JButton btn1; private JButton btn2; private JButton btn3; private JButton btn4; private JButton btn5;
public GridFrame(){ Toolkit tk = Toolkit.getDefaultToolkit();//获取工具对象 int screenWidth = (int)tk.getScreenSize().getWidth(); int screenHeight = (int)tk.getScreenSize().getHeight(); this.setSize(500, 400);//设置窗体大小--像素 this.setLocation((screenWidth-500)/2, (screenHeight-400)/2);//设置窗体的位置 this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//设置窗体关闭即退出程序 this.setTitle("我的第一个GUI窗体");//标题栏设置标题 this.setIconImage(tk.createImage("image/icon.png"));//设置标题栏图标 this.setResizable(false);//设置窗体改变大小的能力 this.addContent(); this.setVisible(true);//设置该窗体可见 } private void addContent(){ this.contentP = this.getContentPane();//获取内容面板 this.contentP.setBackground(Color.WHITE);//设置窗体背景色 this.contentP.setLayout(new GridLayout(2,3));//设置布局管理器为网格布局管理器 this.btn1 = new JButton("button1"); this.btn2 = new JButton("button2"); this.btn3 = new JButton("button3"); this.btn3.setFont(new Font("宋体",Font.BOLD,28)); this.btn4 = new JButton("button4"); this.btn5 = new JButton("button5"); this.contentP.add(this.btn1); this.contentP.add(this.btn2); this.contentP.add(this.btn3); this.contentP.add(this.btn4); this.contentP.add(this.btn5); } }
public static void main(String[] args) { // TODO Auto-generated method stub GridFrame gFrame = new GridFrame(); }
面板类JPand:面板嵌套
1.定义内容面板:设置分割框体:
public class GameFrame extends JFrame { private Container contentP; private UpPanel upP;
private MidPanel midP; private DownPanel dnP; public GameFrame(){ Toolkit tk = Toolkit.getDefaultToolkit();//获取工具对象 int screenWidth = (int)tk.getScreenSize().getWidth(); int screenHeight = (int)tk.getScreenSize().getHeight(); this.setSize(300, 300);//设置窗体大小--像素 this.setLocation((screenWidth-300)/2, (screenHeight-300)/2);//设置窗体的位置 this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//设置窗体关闭即退出程序 this.setTitle("猜数字游戏");//标题栏设置标题 this.setIconImage(tk.createImage("image/icon.png"));//设置标题栏图标 this.setResizable(false);//设置窗体改变大小的能力 this.addContent(); this.setVisible(true);//设置该窗体可见 } private void addContent() { // TODO Auto-generated method stub this.contentP = this.getContentPane(); this.contentP.setLayout(new GridLayout(3,1));//用网格布局划分框体 this.upP = new UpPanel(); this.midP = new MidPanel(); this.dnP = new DownPanel(this); this.contentP.add(this.upP); this.contentP.add(this.midP); this.contentP.add(this.dnP); } public Container getContentP() { return contentP; } public void setContentP(Container contentP) { this.contentP = contentP; } public UpPanel getUpP() { return upP; } public void setUpP(UpPanel upP) { this.upP = upP; } public MidPanel getMidP() { return midP; } public void setMidP(MidPanel midP) { this.midP = midP; } public DownPanel getDnP() { return dnP; } public void setDnP(DownPanel dnP) { this.dnP = dnP; } }
2.先设置布局上框架:
public class UpPanel extends JPanel { private JTextField inputTxt;//设置文本框 public UpPanel() { // TODO Auto-generated constructor stub this.setBackground(Color.LIGHT_GRAY); this.setLayout(new FlowLayout());//JPanel默认的布局管理器就是流布局 this.setBorder(BorderFactory.createTitledBorder(BorderFactory.createLineBorder(Color.BLACK), "Your Guess"));
//(Color.BLACK):边框颜色, "Your Guess":设置边框文字
this.inputTxt = new JTextField(); this.inputTxt.setColumns(10); this.add(this.inputTxt); } public JTextField getInputTxt() { return inputTxt; } public void setInputTxt(JTextField inputTxt) { this.inputTxt = inputTxt; } }
3.设置中间框架:
public class MidPanel extends JPanel { private JLabel msgLab; public MidPanel() { // TODO Auto-generated constructor stub this.setBackground(Color.LIGHT_GRAY); this.setLayout(null); this.setBorder(BorderFactory.createTitledBorder(BorderFactory.createLineBorder(Color.BLACK), "Hint")); this.msgLab = new JLabel("Let‘s Play HiLo"); this.msgLab.setBounds(100, 30, 100, 30); this.add(this.msgLab); } public JLabel getMsgLab() { return msgLab; } public void setMsgLab(JLabel msgLab) { this.msgLab = msgLab; }
4.设置下部框体:
4-1.先设置边界布局:并设置按钮
public class DownPanel extends JPanel { private ButtonPanel btnP;//设置按钮 public DownPanel(GameFrame gm) { // TODO Auto-generated constructor stub this.setBackground(Color.LIGHT_GRAY); this.setLayout(new BorderLayout()); this.btnP = new ButtonPanel(gm); this.add(BorderLayout.SOUTH,this.btnP); } public ButtonPanel getBtnP() { return btnP; } public void setBtnP(ButtonPanel btnP) { this.btnP = btnP; } }
4-2.按钮设置
public class ButtonPanel extends JPanel { private JButton enterBtn; private JButton cancelBtn; this.setBackground(Color.LIGHT_GRAY); this.enterBtn = new JButton("确定"); this.cancelBtn = new JButton("取消"); this.add(this.enterBtn); this.add(this.cancelBtn); this.enterBtn.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub //首先获取文本框中的输入 //做输入有效性校验---正则 //校验通过,转换为整数,再和随机数比较 //然后根据比较结果,修改标签的显示信息 } }); }
public JButton getEnterBtn() { return enterBtn; } public void setEnterBtn(JButton enterBtn) { this.enterBtn = enterBtn; } public JButton getCancelBtn() { return cancelBtn; } public void setCancelBtn(JButton cancelBtn) { this.cancelBtn = cancelBtn; } }
public static void main(String[] args) { // TODO Auto-generated method stub GameFrame game = new GameFrame(); }
事件处理:
事件:按钮——事件源对象
委托事件模型:(1)事件源:——绑定关系——(2)监听器对象:
一个监听器可以绑定多个事件源;一个事件源可以绑定多个监听器;监听器有各自的监听事件类型;
步骤:1.写好界面,事件源对象已经有了;
2.选择合适的监听器类型;
3.书写监听器的实现类(写好处理代码);
4.产生监听器对象和事件源对象进行绑定;
Event + Listrener:事件源监听器接口:Action(动作)
监听器实现方式一:
单独书写一个类,实现监听器接口。
特点:1.可以让一个监听器类监听多个事件源,用if判断进行分割;但这么做违背了单一职责、因此从设计上每一个事件源书写单独的监听器类。
2.如果需要操作费时间远的其它组件,只能传参。
监听器实现方式二:
让容器类充当监听器。
特点:1.只能让一个监听器类监听多个事件源,用if判断进行分割;铁定违背单一职责。
2.操作本容器的组件或中间容器,不用传参;
监听器实现方式三:
匿名内部类——在跟事件源对象绑定监听器对象的同时,实现监听器类。
特点:1.每个事件源对象拥有独立的监听器类,同时没有多的java文件。即满足单一,又没有增加文件量。
2.操作外部容器类的任何组件或子容器不用传参。
public class ColorFrame extends JFrame{ private Container contentP; private JButton redBtn; private JButton greenBtn; public ColorFrame(){ Toolkit tk = Toolkit.getDefaultToolkit();//获取工具对象 int screenWidth = (int)tk.getScreenSize().getWidth(); int screenHeight = (int)tk.getScreenSize().getHeight(); this.setSize(300, 300);//设置窗体大小--像素 this.setLocation((screenWidth-300)/2, (screenHeight-300)/2);//设置窗体的位置 this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//设置窗体关闭即退出程序 this.setTitle("我的第一个GUI窗体");//标题栏设置标题 this.setIconImage(tk.createImage("image/icon.png"));//设置标题栏图标 this.setResizable(false);//设置窗体改变大小的能力 this.addContent(); this.setVisible(true);//设置该窗体可见 } private void addContent() { // TODO Auto-generated method stub this.contentP = this.getContentPane(); this.contentP.setBackground(Color.WHITE); this.contentP.setLayout(new FlowLayout()); //事件源对象 this.redBtn = new JButton("红色"); this.redBtn.setActionCommand("red"); this.greenBtn = new JButton("绿色"); this.greenBtn.setActionCommand("green"); this.redBtn.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub ColorFrame.this.contentP.setBackground(Color.RED); ColorFrame.this.redBtn.setEnabled(false); ColorFrame.this.greenBtn.setEnabled(true); } }); this.greenBtn.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub ColorFrame.this.contentP.setBackground(Color.GREEN); ColorFrame.this.redBtn.setEnabled(true); ColorFrame.this.greenBtn.setEnabled(false); } }); this.contentP.add(this.redBtn); this.contentP.add(this.greenBtn); } }
读取文件:
public class LoginFrame extends JFrame { private Container contentP; private JLabel nameLab; private JLabel pwdLab; private JTextField nameTxt; private JPasswordField pwdTxt; private JButton loginBtn; private Properties props; public LoginFrame() { // TODO Auto-generated constructor stub Toolkit tk = Toolkit.getDefaultToolkit();//获取工具对象 int screenWidth = (int)tk.getScreenSize().getWidth(); int screenHeight = (int)tk.getScreenSize().getHeight(); this.setSize(300, 300);//设置窗体大小--像素 this.setLocation((screenWidth-300)/2, (screenHeight-300)/2);//设置窗体的位置 this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//设置窗体关闭即退出程序 this.setTitle("用户登录");//标题栏设置标题 this.setIconImage(tk.createImage("image/icon.png"));//设置标题栏图标 this.setResizable(false);//设置窗体改变大小的能力 this.addContent(); this.setVisible(true);//设置该窗体可见 this.props = new Properties(); try { props.load(new FileInputStream("user.properties")); } catch (FileNotFoundException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } catch (IOException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } } private void addContent() { // TODO Auto-generated method stub this.contentP = this.getContentPane(); this.contentP.setBackground(Color.WHITE); this.contentP.setLayout(null); this.nameLab = new JLabel("用户名:"); this.nameLab.setBounds(20, 20, 80, 30); this.contentP.add(this.nameLab); this.pwdLab = new JLabel("密 码:"); this.pwdLab.setBounds(20, 70, 80, 30); this.contentP.add(this.pwdLab); this.nameTxt = new JTextField(); this.nameTxt.setBounds(110, 25, 100, 20); this.contentP.add(this.nameTxt); this.pwdTxt = new JPasswordField(); this.pwdTxt.setBounds(110, 75, 100, 20); this.contentP.add(this.pwdTxt); this.loginBtn = new JButton("登录"); this.loginBtn.setBounds(160, 110, 80, 25); this.contentP.add(this.loginBtn); this.loginBtn.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub String inputName = LoginFrame.this.nameTxt.getText(); String password = new String(LoginFrame.this.pwdTxt.getPassword()); if(inputName.equals(props.getProperty("username")) && password.equals(props.getProperty("password"))){ JOptionPane.showMessageDialog(LoginFrame.this, "登录成功!"); }else{ JOptionPane.showMessageDialog(LoginFrame.this, "登录失败!"); } LoginFrame.this.nameTxt.setText(""); LoginFrame.this.pwdTxt.setText(""); LoginFrame.this.nameTxt.requestFocus(); } }); }
4.卡片布局(最实用“事件处理用”):布局管理器最后一种,也是最常用种;
整个翻页: 内容面板 设置为 卡片布局
布局翻页: JPael 设置为 卡片布局
4-1.设置内容面板:
public class CardFrame extends JFrame{ private Container contentP; private SeasonPanel seaP;//设置卡片布局管理器 private ButtonPanel btnP;//设置布局器管理器的步骤 public CardFrame(){ Toolkit tk = Toolkit.getDefaultToolkit();//获取工具对象 int screenWidth = (int)tk.getScreenSize().getWidth(); int screenHeight = (int)tk.getScreenSize().getHeight(); this.setSize(300, 300);//设置窗体大小--像素 this.setLocation((screenWidth-300)/2, (screenHeight-300)/2);//设置窗体的位置 this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//设置窗体关闭即退出程序 this.setTitle("卡片布局管理");//标题栏设置标题 this.setIconImage(tk.createImage("image/icon.png"));//设置标题栏图标 this.setResizable(false);//设置窗体改变大小的能力 this.addContent(); this.setVisible(true);//设置该窗体可见 } private void addContent() { // TODO Auto-generated method stub this.contentP = this.getContentPane(); this.contentP.setLayout(new BorderLayout()); this.seaP = new SeasonPanel(); this.btnP = new ButtonPanel(this); this.contentP.add(BorderLayout.CENTER,this.seaP); this.contentP.add(BorderLayout.SOUTH,this.btnP); } public SeasonPanel getSeaP() { return seaP; } public void setSeaP(SeasonPanel seaP) { this.seaP = seaP; } public ButtonPanel getBtnP() { return btnP; } public void setBtnP(ButtonPanel btnP) { this.btnP = btnP; } }
4-2.设置卡片管理布局器
public class SeasonPanel extends JPanel { private SpringPanel sprP;//设置颜色或添加相片 private SummerPanel sumP;//设置颜色或添加相片
private AutumnPanel autP;//设置颜色或添加相片
private WinterPanel winP;//设置颜色或添加相片
public SeasonPanel(){ this.setBackground(Color.BLACK); this.setLayout(new CardLayout());//设置卡片布局管理器 this.sprP = new SpringPanel(); this.sumP = new SummerPanel(); this.autP = new AutumnPanel(); this.winP = new WinterPanel(); //第一个被放入的卡片在最上面 //每张卡片放入的时候要给出别名 this.add("spring", this.sprP); this.add("summer", this.sumP); this.add("autumn", this.autP); this.add("winter", this.winP); } public SpringPanel getSprP() { return sprP; } public void setSprP(SpringPanel sprP) { this.sprP = sprP; } public SummerPanel getSumP() { return sumP; } public void setSumP(SummerPanel sumP) { this.sumP = sumP; } public AutumnPanel getAutP() { return autP; } public void setAutP(AutumnPanel autP) { this.autP = autP; } public WinterPanel getWinP() { return winP; } public void setWinP(WinterPanel winP) { this.winP = winP; } }
4-2-1.设置颜色或添加图片
public class SpringPanel extends JPanel { public SpringPanel(){ this.setBackground(Color.GREEN); } } public class SummerPanel extends JPanel{ public SummerPanel(){ this.setBackground(Color.RED); } } public class AutumnPanel extends JPanel { public AutumnPanel(){ this.setBackground(Color.ORANGE); } } public class WinterPanel extends JPanel { public WinterPanel(){ this.setBackground(Color.LIGHT_GRAY); } }
4-3.设置卡片管理布局器步骤
public class ButtonPanel extends JPanel { private JButton firstBtn; private JButton lastBtn; private JButton nextBtn; private JButton preBtn; private JButton sumBtn; private CardFrame cardF; public ButtonPanel(CardFrame cardF) { // TODO Auto-generated constructor stub this.cardF = cardF; this.setBackground(Color.WHITE); this.setLayout(new FlowLayout()); this.firstBtn = new JButton("|<"); this.firstBtn.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub //翻页步骤:1、首先得到被设置为卡片布局的那个容器 SeasonPanel sp = ButtonPanel.this.cardF.getSeaP(); //2、得到这个容器的布局管理器 CardLayout card = (CardLayout)sp.getLayout(); //3、调用该布局管理器翻页 card.first(sp); } }); this.preBtn = new JButton("<<"); this.preBtn.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub //翻页步骤:1、首先得到被设置为卡片布局的那个容器 SeasonPanel sp = ButtonPanel.this.cardF.getSeaP(); //2、得到这个容器的布局管理器 CardLayout card = (CardLayout)sp.getLayout(); //3、调用该布局管理器翻页 card.previous(sp); } }); this.nextBtn = new JButton(">>"); this.nextBtn.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub //翻页步骤:1、首先得到被设置为卡片布局的那个容器 SeasonPanel sp = ButtonPanel.this.cardF.getSeaP(); //2、得到这个容器的布局管理器 CardLayout card = (CardLayout)sp.getLayout(); //3、调用该布局管理器翻页 card.next(sp); } }); this.lastBtn = new JButton(">|"); this.lastBtn.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub //翻页步骤:1、首先得到被设置为卡片布局的那个容器 SeasonPanel sp = ButtonPanel.this.cardF.getSeaP(); //2、得到这个容器的布局管理器 CardLayout card = (CardLayout)sp.getLayout(); //3、调用该布局管理器翻页 card.last(sp); } }); this.sumBtn = new JButton("夏天"); this.sumBtn.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub //翻页步骤:1、首先得到被设置为卡片布局的那个容器 SeasonPanel sp = ButtonPanel.this.cardF.getSeaP(); //2、得到这个容器的布局管理器 CardLayout card = (CardLayout)sp.getLayout(); //3、调用该布局管理器翻页 card.show(sp, "summer"); } }); this.add(this.firstBtn); this.add(this.preBtn); this.add(this.nextBtn); this.add(this.lastBtn); this.add(this.sumBtn); } }
设置背景:
public class CardFrame2 extends JFrame { private Container contentP; private JLabel backLab; private JButton okBtn; public CardFrame2(){ Toolkit tk = Toolkit.getDefaultToolkit();//获取工具对象 int screenWidth = (int)tk.getScreenSize().getWidth(); int screenHeight = (int)tk.getScreenSize().getHeight(); this.setSize(600, 428);//设置窗体大小--像素;大小要与背景图片一样并且加上标题框高度+28 this.setLocation((screenWidth-600)/2, (screenHeight-428)/2);//设置窗体的位置 this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//设置窗体关闭即退出程序 this.setTitle("背景图片问题");//标题栏设置标题 this.setIconImage(tk.createImage("image/icon.png"));//设置标题栏图标 this.setResizable(false);//设置窗体改变大小的能力 this.addContent(); this.setVisible(true);//设置该窗体可见 } private void addContent() { // TODO Auto-generated method stub this.contentP = this.getContentPane(); this.contentP.setLayout(new BorderLayout()); this.backLab = new JLabel(new ImageIcon("background.jpg")); this.contentP.add(this.backLab); this.backLab.setLayout(null); this.okBtn = new JButton("确定"); this.okBtn.setBounds(200,50, 80, 30); this.backLab.add(this.okBtn); } }
GUI