javaGUI --狂神说

it2024-08-02 36

文章目录

GUI2.AWT2.1Awt介绍2.2组件和容器framepanel布局管理器 2.3.事件监听2.4输入框2.5简易计算器组合+内部类回顾2.6画笔paint2.7鼠标监听2.8键盘监听2.9窗口监听 3.Swing3.1 窗口面板3.2弹窗3.3标签3.4面板3.5按钮3.6列表3.7文本框贪吃蛇

GUI

核心：Swing AWT

缺点：1.界面不美观2.需要jre环境

2.AWT

2.1Awt介绍

1.包含很多类和接口！GUI

2.元素：窗口按钮

2.2组件和容器

frame

package gui; import java.awt.*; public class TestFrame { public static void main(String[] args) { Frame frame = new Frame("这是我的第一个Java图像接口设置"); //需要设置可见性 w h frame.setVisible(true); //设置窗口大小 frame.setSize(400,400); //设置背景颜色color frame.setBackground(new Color(0, 253, 223)); //弹出初始位置 frame.setLocation(200,200); //设置大小不可变 frame.setResizable(false); } }

缺点:不可关闭解决：停止java运行

package gui.lesson01; import java.awt.*; public class TestFrame02 { public static void main(String[] args) { MyFrame myFrame1 = new MyFrame(Color.blue, 100, 100, 200, 200); MyFrame myFrame2 = new MyFrame(Color.yellow, 300, 100, 200, 200); MyFrame myFrame3 = new MyFrame(Color.red, 100, 300, 200, 200); MyFrame myFrame4 = new MyFrame(Color.orange, 300, 300, 200, 200); } } class MyFrame extends Frame { static int id=0;//可能存在多个窗口，我们需要一个计数器 public MyFrame(Color color,int x,int y,int w,int h){ super("Myframe+"+(++id)); setBackground(color); setBounds(x,y,w,h); setVisible(true); } }

panel

package gui.lesson01; import java.awt.*; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; //panel 面板可以看作一个空间，但不能单独存在 public class TestPanel { public static void main(String[] args) { Frame frame = new Frame(); //布局的概念 Panel panel = new Panel(); //设置布局 frame.setLayout(null); //坐标 frame.setBackground(new Color(0xFFB700)); frame.setBounds(300,400,500,600); //panel 坐标相对于frame panel.setBackground(Color.BLUE); panel.setBounds(100,200,300,300); //frame.add(panel) frame.add(panel); frame.setVisible(true); //监听事件，监听窗口关闭事件 system.exit(0)关闭 //适配器模式：adapted frame.addWindowListener(new WindowAdapter() { @Override public void windowClosing(WindowEvent e) { System.exit(0); } }); } }

可以关闭

布局管理器

流式布局东西南北中表格布局 package gui.lesson01; import java.awt.*; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; public class TestFlowLayout { public static void main(String[] args) { Frame frame = new Frame(); //组件 button Button button1 = new Button("button1"); Button button2 = new Button("button2"); Button button3 = new Button("button2"); //设置流式布局 //frame.setLayout(new FlowLayout(FlowLayout.LEFT));//靠左 //frame.setLayout(new FlowLayout(FlowLayout.RIGHT));//靠右 frame.setLayout(new FlowLayout());//居中 frame.setSize(200,200); //添加按钮 frame.add(button1); frame.add(button2); frame.add(button3); //frame可视化 frame.setVisible(true); //frame关闭 frame.addWindowListener(new WindowAdapter() { @Override public void windowClosing(WindowEvent e) { super.windowClosing(e); System.exit(0); } }); } }

东西南北中

package gui.lesson01; import java.awt.*; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; public class TestBorderLayout { public static void main(String[] args) { Frame frame = new Frame(); Button earth = new Button("earth"); Button west = new Button("west"); Button south = new Button("south"); Button north= new Button("north"); Button center = new Button("center"); frame.add(earth,BorderLayout.EAST); frame.add(west,BorderLayout.WEST); frame.add(south,BorderLayout.SOUTH); frame.add(north,BorderLayout.NORTH); frame.add(center,BorderLayout.CENTER); frame.setSize(200,200); frame.setVisible(true); //监听 frame.addWindowListener(new WindowAdapter() { @Override public void windowClosing(WindowEvent e) { super.windowClosing(e); System.exit(0); } }); } }

表格grid

package gui.lesson01; import java.awt.*; public class TestGridLayout { public static void main(String[] args) { Frame frame = new Frame("TestGridLayout"); Button but1 = new Button("but1"); Button but2 = new Button("but2"); Button but3 = new Button("but3"); Button but4 = new Button("but4"); Button but5 = new Button("but5"); Button but6 = new Button("but6"); frame.setLayout(new GridLayout(3,2)); frame.add(but1); frame.add(but2); frame.add(but3); frame.add(but4); frame.add(but5); frame.add(but6); frame.pack();//java函数寻找适合布局 frame.setVisible(true); } }

练习题

构思：1个 frame 2.4个面板 border 左button 中panel 右button

package gui.lesson01; import java.awt.*; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; public class TestLesson { public static void main(String[] args) { Frame frame = new Frame("课堂练习" ); frame.setSize(100,200); frame.setLocation(100,100); frame.setBackground(new Color(0, 253, 149)); frame.setLayout(new GridLayout(2,3)); Panel p1 = new Panel(new BorderLayout()); Panel p2 = new Panel(new GridLayout(2,1)); Panel p3 = new Panel(new BorderLayout()); Panel p4 = new Panel(new GridLayout(2,2)); p1.add(new Button("EAST-1"),BorderLayout.EAST); p1.add(new Button("WEST-1"),BorderLayout.WEST); p2.add(new Button("p2-btn-1")); p2.add(new Button("p2-btn-2")); p1.add(p2,BorderLayout.CENTER); p3.add(new Button("EAST-2"),BorderLayout.EAST); p3.add(new Button("WEST-2"),BorderLayout.WEST); p4.add(new Button("p4-btn-1")); p4.add(new Button("p4-btn-2")); p4.add(new Button("p4-btn-3")); p4.add(new Button("p4-btn-4")); p3.add(p4,BorderLayout.CENTER); frame.add(p1); frame.add(p3); Button button3 = new Button("button3"); Button button4 = new Button("button4"); Button button5 = new Button("button5"); Button button6 = new Button("button6"); Button button7 = new Button("button7"); Button button8 = new Button("button8"); Button button9 = new Button("button9"); Button button10 = new Button("button10"); frame.pack(); frame.setVisible(true); frame.addWindowListener(new WindowAdapter() { @Override public void windowClosing(WindowEvent e) { super.windowClosing(e); System.exit(0); } }); } }

总结：1.frame是一个顶级窗口

2.panel 无法单独显示，必须添加到某个容器

3.布局管理器

1.流式

2.东西南北中

3.表格

4.大小、定位、背景颜色、可见性，监听！

2.3.事件监听

事件监听：当某件事情发生的时候，干什么？

package gui.lesson01; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; public class TestActionEvent { public static void main(String[] args) { Frame frame = new Frame(); Button button = new Button(); //因为，addActionListener()需要一个ActionListener,所以我们需要构造一个ActionListener MyActionListener myActionListener = new MyActionListener(); button.addActionListener(myActionListener); frame.add(button,BorderLayout.CENTER); frame.pack(); windowClose(frame); frame.setVisible(true); } private static void windowClose(Frame frame){ frame.addWindowListener(new WindowAdapter() { @Override public void windowClosing(WindowEvent e) { System.exit(0); } }); } } class MyActionListener implements ActionListener{ @Override public void actionPerformed(ActionEvent e) { System.out.println("aaa"); } }

多个按钮共享一个事件

package gui.lesson01; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; public class TestActionEvent2 { public static void main(String[] args) { //两个按钮实现同一个监听 //开始停止 Frame frame = new Frame("开始-停止"); Button btn1 = new Button("start"); Button btn2 = new Button("stop");; //可以显示的定义触发会返回的命令，如果不显式定义，则会走默认的值 //可以多个按钮只写一个监听器 btn1.setActionCommand("btn1-start"); Mymonitor mymonitor = new Mymonitor(); btn1.addActionListener(mymonitor); btn2.addActionListener(mymonitor); frame.add(btn1,BorderLayout.EAST); frame.add(btn2,BorderLayout.WEST); close(frame); frame.pack(); frame.setVisible(true); } public static void close(Frame frame){ frame.addWindowListener(new WindowAdapter() { @Override public void windowClosing(WindowEvent e) { System.exit(0); } }); } } class Mymonitor implements ActionListener{ @Override public void actionPerformed(ActionEvent e) { //getActionCommand()获得按钮信息 System.out.println("按钮被执行了:msg=>"+e.getActionCommand()); } }

2.4输入框

2.5简易计算器组合+内部类回顾

oop原则：组合>继承

class A extends B{}//继承 class A { public B b; }//组合 package gui.lesson01; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; //建议计算器 public class TestCale { public static void main(String[] args) { new Calculator(); } } //计算器类 class Calculator extends Frame{ public Calculator() { //三个文本框 TextField num1 = new TextField(10);//字符数 TextField num2 = new TextField(10);//字符数 TextField num3 = new TextField(20);//字符数 //一个按钮 Button button = new Button("="); //一个标签 Label label = new Label("+"); //布局 setLayout(new FlowLayout()); add(num1); add(label); add(num2); add(button); add(num3); button.addActionListener(new MyCalcListener(num1,num2,num3)); pack(); setVisible(true); addWindowListener(new WindowAdapter() { @Override public void windowClosing(WindowEvent e) { System.exit(0); } }); } } //监听器类 class MyCalcListener implements ActionListener{ //获得三个变量 private TextField num1,num2,num3; public MyCalcListener(TextField num1,TextField num2 ,TextField num3) { this.num1=num1; this.num2=num2; this.num3=num3; } @Override public void actionPerformed(ActionEvent e) { //1.获得加数与被加数 int n1= Integer.parseInt(num1.getText()); int n2= Integer.parseInt(num2.getText()); //2.将两个数相加放于第三个框 num3.setText(""+(n1+n2)); //3.清空前两个框 num1.setText(""); num2.setText(""); } }

完全转为面向对象

package gui.lesson01; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; //简易计算器 public class TestCale { public static void main(String[] args) { Calculator calculator = new Calculator(); calculator.loadFrame(); } } //计算器类 class Calculator extends Frame{ //属性 TextField num1,num2,num3; //方法 public void loadFrame(){ //三个文本框 num1 = new TextField(10);//字符数 num2 = new TextField(10);//字符数 num3 = new TextField(20);//字符数 //一个按钮 Button button = new Button("="); //一个标签 Label label = new Label("+"); button.addActionListener(new MyCalcListener(this)); //布局 setLayout(new FlowLayout()); add(num1); add(label); add(num2); add(button); add(num3); pack(); setVisible(true); addWindowListener(new WindowAdapter() { @Override public void windowClosing(WindowEvent e) { System.exit(0); } }); } } //监听器类 class MyCalcListener implements ActionListener{ //获得三个变量 Calculator calculator=null; public MyCalcListener(Calculator calculator) { this.calculator=calculator; } @Override public void actionPerformed(ActionEvent e) { //1.获得加数与被加数 int n1= Integer.parseInt(calculator.num1.getText()); int n2= Integer.parseInt(calculator.num2.getText()); //2.将两个数相加放于第三个框 calculator.num3.setText(""+(n1+n2)); //3.清空前两个框 calculator.num1.setText(""); calculator.num2.setText(""); } }

内部类

更好的包装 package gui.lesson01; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; //简易计算器 public class TestCale { public static void main(String[] args) { Calculator calculator = new Calculator(); calculator.loadFrame(); } } //计算器类 class Calculator extends Frame{ //属性 TextField num1,num2,num3; //方法 public void loadFrame(){ //三个文本框 num1 = new TextField(10);//字符数 num2 = new TextField(10);//字符数 num3 = new TextField(20);//字符数 //一个按钮 Button button = new Button("="); //一个标签 Label label = new Label("+"); button.addActionListener(new MyCalcListener()); //布局 setLayout(new FlowLayout()); add(num1); add(label); add(num2); add(button); add(num3); pack(); setVisible(true); addWindowListener(new WindowAdapter() { @Override public void windowClosing(WindowEvent e) { System.exit(0); } }); } //监听器类 //内部类最大的优势可以畅通无阻的访问外部类 private class MyCalcListener implements ActionListener{ //获得三个变量 @Override public void actionPerformed(ActionEvent e) { //1.获得加数与被加数 int n1= Integer.parseInt(num1.getText()); int n2= Integer.parseInt(num2.getText()); //2.将两个数相加放于第三个框 num3.setText(""+(n1+n2)); //3.清空前两个框 num1.setText(""); num2.setText(""); } } }

2.6画笔paint

package gui.lesson01; import java.awt.*; public class Testpaint { public static void main(String[] args) { new Mypaint().loadFrame(); } } class Mypaint extends Frame{ public void loadFrame(){ setBounds(200,300,400,500); setVisible(true); } @Override public void paint(Graphics g) { //选取颜色 //画笔可以画画 g.setColor(Color.red); g.drawOval(100,100,100,100); g.fillOval(50,50,50,50); g.setColor(Color.GREEN); g.drawRect(100,300,150,150); //养成习惯，画笔用完，将他还原为原来原色 g.setColor(Color.BLACK); } }

2.7鼠标监听

目的：点击鼠标画点

package gui.lesson01; import java.awt.*; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import java.util.ArrayList; import java.util.Iterator; //鼠标监听 public class TestMouseListener { public static void main(String[] args) { new MyFrame2("画图"); } } class MyFrame2 extends Frame{ ArrayList points; //画画需要画笔需要监听鼠标的位置，需要集合来储存这个点的位置 public MyFrame2(String title){ super(title); setBounds(200,200,300,400); //存鼠标的点 points = new ArrayList<>(); //鼠标监听器在Frame this.addMouseListener(new MyMouselListenner()); setVisible(true); } @Override public void paint(Graphics g) { //画画监听鼠标事件 Iterator iterator = points.iterator(); while(iterator.hasNext()){ Point point =(Point)iterator.next(); g.setColor(Color.blue); g.fillOval(point.x,point.y,10,10); } } //添加一个点到界面上 public void addPoint(Point point){ points.add(point); } //适配器模式 private class MyMouselListenner extends MouseAdapter{ // 鼠标按下弹起按住不动 @Override public void mousePressed(MouseEvent e) { MyFrame2 frame=(MyFrame2)e.getSource(); //我们点击的时候会产生一个点！frame.addpoint()没有方法自己写 //这个点就是鼠标的点 frame.addPoint(new Point(e.getX(),e.getY())); //需要重画 frame.repaint(); } } }

2.8键盘监听

package gui.lesson01; import com.sun.scenario.effect.impl.sw.sse.SSEBlend_SRC_OUTPeer; import java.awt.*; import java.awt.event.KeyAdapter; import java.awt.event.KeyEvent; //键盘 public class TestKeyListener { public static void main(String[] args) { new KeyFrame(); } } class KeyFrame extends Frame{ public KeyFrame() { setBounds(10,10,100,200); setVisible(true); this.addKeyListener(new KeyAdapter() { @Override public void keyPressed(KeyEvent e) { int keyCode= e.getKeyCode(); System.out.println(keyCode); if(keyCode==KeyEvent.VK_UP) { System.out.println("你按了上键"); } //根据按下不同操作，进行不同处理 } }); } }

2.9窗口监听

package gui.lesson01; import java.awt.*; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; public class TestWindowListener { public static void main(String[] args) { new MyWindowFrame(); } } class MyWindowFrame extends Frame { public MyWindowFrame() { setBounds(100, 100, 200, 300); setBackground(Color.blue); setVisible(true); //addWindowListener(new MyWindowListener()); this.addWindowListener(new WindowAdapter() { @Override public void windowOpened(WindowEvent e) { super.windowOpened(e); } @Override public void windowClosed(WindowEvent e) { super.windowClosed(e); } //激活窗口 @Override public void windowActivated(WindowEvent e) { MyWindowFrame source =(MyWindowFrame) e.getSource(); source.setTitle("被激活了"); super.windowActivated(e); } @Override public void windowClosing(WindowEvent e) { super.windowClosing(e); System.exit(0); } }); } } /*class MyWindowListener extends WindowAdapter{ @Override public void windowClosing(WindowEvent e) { setVisible(false);//隐藏窗口通过按钮隐藏当前窗口 System.exit(0);//正常退出，非正常推出1 } } }*/

3.Swing

3.1 窗口面板

package lesson02; import com.sun.javaws.util.JfxHelper; import javax.swing.*; import java.awt.*; public class JFrameDemo02 { public static void main(String[] args) { new MyJframe().init(); } } class MyJframe extends JFrame{ public void init(){ this.setVisible(true); this.setBounds(10,10,200,200); JLabel jLabel = new JLabel("欢迎"); this.add(jLabel); //文本居中 jLabel.setHorizontalAlignment(0); Container contentPane = this.getContentPane();//获得容器 contentPane.setBackground(Color.blue); } }

3.2弹窗

package gui.lesson013; import javax.swing.*; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; public class DialogDemo extends JFrame { public DialogDemo() { this.setVisible(true); this.setBounds(100,100,200,300); this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); //Jframe 放东西容器 Container container =this.getContentPane(); //绝对布局 container.setLayout(null); //按钮 JButton button = new JButton("点击弹出一个弹窗"); button.setBounds(30,30,200,50); //点击按钮会弹出一个弹窗 button.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { //弹窗 new MyDialog(); } }); //加入容器 container.add(button); } public static void main(String[] args) { new DialogDemo(); } } //弹窗的窗口 class MyDialog extends JDialog{ public MyDialog() { this.setVisible(true); this.setBounds(100,100,500,500); Container container =this.getContentPane(); container.setLayout(null); //container.add(new Label("我去")); } }

3.3标签

new JLabel("xxx")

图标 Icon

package gui.lesson013; import javax.swing.*; import java.awt.*; //图标，需要实现类，Frame 继承 public class IconDemo extends JFrame implements Icon { private int width; private int height; public IconDemo(){}//无参构造 public IconDemo(int width,int height){ this.height=height; this.width=width; }//有参构造 public void init(){ IconDemo iconDemo = new IconDemo(30, 30); //图标放在标签，或按钮上 JLabel label = new JLabel("小图标黑点", iconDemo, SwingConstants.CENTER); Container container = getContentPane(); container.add(label); this.setVisible(true); this.setBounds(100,100,200,500); this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public static void main(String[] args) { new IconDemo().init(); } @Override public void paintIcon(Component c, Graphics g, int x, int y) { g.fillOval(x,y,height,width); } @Override public int getIconWidth() { return this.width; } @Override public int getIconHeight() { return this.height; } }

图片Icon

package gui.lesson013; import javax.swing.*; import java.awt.*; import java.net.URL; public class ImageIconDome extends JFrame { public ImageIconDome(){ JLabel jLabel = new JLabel(); URL url = ImageIconDome.class.getResource("萌狗.jpg");//获得当前包下的文件 ImageIcon imageIcon = new ImageIcon(url); jLabel.setIcon(imageIcon); jLabel.setHorizontalAlignment(SwingConstants.CENTER); Container container = getContentPane(); container.add(jLabel); setBounds(100,100,300,300); setVisible(true); setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public static void main(String[] args) { new ImageIconDome(); } }

3.4面板

Jpanel

package lesson02; import javax.swing.*; import java.awt.*; public class JpanelDemo extends JFrame { public JpanelDemo(){ Container container = this.getContentPane(); container.setLayout(new GridLayout(2,2,10,10)); JPanel panel1 = new JPanel(new GridLayout(2,2)); JPanel panel2 = new JPanel(new GridLayout(2,1)); JPanel panel3 = new JPanel(new GridLayout(3,1)); JPanel panel4 = new JPanel(new GridLayout(3,2)); panel1.add(new JButton("1")); panel1.add(new JButton("1")); panel1.add(new JButton("1")); panel1.add(new JButton("1")); panel2.add(new JButton("2")); panel2.add(new JButton("2")); panel3.add(new JButton("3")); panel3.add(new JButton("3")); panel3.add(new JButton("3")); panel4.add(new JButton("4")); panel4.add(new JButton("4")); panel4.add(new JButton("4")); panel4.add(new JButton("4")); panel4.add(new JButton("4")); panel4.add(new JButton("4")); container.add(panel1); container.add(panel2); container.add(panel3); container.add(panel4); this.setVisible(true); this.setSize(300,500); this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public static void main(String[] args) { new JpanelDemo(); } }

JScroll

package lesson02; import javax.swing.*; import java.awt.*; public class JscrollDemo extends JFrame { public JscrollDemo(){ JTextArea jTextArea = new JTextArea(30,50); jTextArea.setText("初次见面请多多关照"); //Scrollpanel JScrollPane jScrollPane = new JScrollPane(jTextArea); Container container = this.getContentPane(); container.add(jScrollPane); this.setVisible(true); this.setBounds(100,200,300,500); this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public static void main(String[] args) { new JscrollDemo(); } }

3.5按钮

普通按钮：

单选按钮 Jradiobutton

package gui.lesson013; import javax.swing.*; import java.awt.*; import java.net.URL; public class JbuttonDemo extends JFrame { public JbuttonDemo(){ Container container = this.getContentPane(); URL resource = JbuttonDemo.class.getResource("萌狗.jpg"); ImageIcon imageIcon = new ImageIcon(resource); //单选框 JRadioButton radioButton01 = new JRadioButton("jbutton01"); JRadioButton radioButton02 = new JRadioButton("jbutton02"); JRadioButton radioButton03 = new JRadioButton("jbutton03"); //单选框每次只能选一个分组 group ButtonGroup group = new ButtonGroup(); group.add(radioButton01); group.add(radioButton02); group.add(radioButton03); container.add(radioButton01,BorderLayout.CENTER); container.add(radioButton02,BorderLayout.NORTH); container.add(radioButton03,BorderLayout.SOUTH); this.setVisible(true); this.setSize(300,500); this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public static void main(String[] args) { new JbuttonDemo(); } }

复选按钮JcheckBox

package gui.lesson013; import javax.swing.*; import java.awt.*; import java.net.URL; public class JbuttonDemo extends JFrame { public JbuttonDemo(){ Container container = this.getContentPane(); container.setLayout(new FlowLayout()); URL resource = JbuttonDemo.class.getResource("萌狗.jpg"); ImageIcon imageIcon = new ImageIcon(resource); //多选框 JCheckBox checkBox01 = new JCheckBox("工资"); JCheckBox checkBox02 = new JCheckBox("头发"); JCheckBox checkBox03 = new JCheckBox("感情"); container.add(checkBox01); container.add(checkBox02); container.add(checkBox03); this.setVisible(true); this.setSize(300,500); this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public static void main(String[] args) { new JbuttonDemo(); } }

3.6列表

下拉框JcomboBox

package gui.Lesson04; import javafx.scene.control.ComboBox; import javax.swing.*; import java.awt.*; public class TestComboBoxDemo extends JFrame { public TestComboBoxDemo() { Container container = this.getContentPane(); JComboBox comboBox = new JComboBox(); comboBox.addItem(null); comboBox.addItem("正在热映"); comboBox.addItem("已下架"); comboBox.addItem("即将上映"); container.add(comboBox); this.setVisible(true); this.setSize(300,500); this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public static void main(String[] args) { new TestComboBoxDemo(); } }

列表框

package gui.Lesson04; import javafx.scene.control.ComboBox; import javax.swing.*; import java.awt.*; import java.util.Vector; public class TestComboBoxDemo extends JFrame { public TestComboBoxDemo() { Container container = this.getContentPane(); //String[] content={"1","2","3"}; Vector vector = new Vector(); JList jList = new JList(vector); vector.add("太清"); vector.add("上清"); vector.add("玉清"); container.add(jList); this.setVisible(true); this.setSize(300,500); this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public static void main(String[] args) { new TestComboBoxDemo(); } }

应用场景

选择地区，或者一些单个选项列表，展示信息，一般是动态扩容

3.7文本框

文本框

package gui.Lesson04; import javax.swing.*; import java.awt.*; public class TestTextDemo01 extends JFrame { public TestTextDemo01() { Container container = this.getContentPane(); //container.setLayout(null); JTextField textField = new JTextField("hello"); JTextField textField02 = new JTextField("world"); container.add(textField,BorderLayout.WEST); container.add(textField02,BorderLayout.EAST); this.setVisible(true); this.setSize(300,300); this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public static void main(String[] args) { new TestTextDemo01(); } }

密码框Jpasswordfield

package gui.Lesson04; import javax.swing.*; import java.awt.*; public class TestTextDemo01 extends JFrame { public TestTextDemo01() { Container container = this.getContentPane(); //container.setLayout(null); JPasswordField passwordField = new JPasswordField("asdhkj"); //passwordField.setEchoChar('*'); container.add(passwordField); //container.add(textField02,BorderLayout.EAST); this.setVisible(true); this.setSize(300,300); this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public static void main(String[] args) { new TestTextDemo01(); } }

文本域

见弹窗处

贪吃蛇

帧如果时间片足够小，就是动画，一秒30帧，一秒60帧。连起来是动画，拆开静态是图片！

键盘监听

定时器Timer

四部：1.定义数据

2.画到画板

3.事件监听

package gui.game; import javax.swing.*; import java.net.URL; //数据中心 public class Date { public static URL headerURL=Date.class.getResource("statics/header.png"); public static ImageIcon header= new ImageIcon(headerURL); public static URL bodyURL=Date.class.getResource("statics/body.png"); public static ImageIcon body= new ImageIcon(bodyURL); public static URL upURL=Date.class.getResource("statics/up.png"); public static ImageIcon up= new ImageIcon(upURL); public static URL downURL=Date.class.getResource("statics/down.png"); public static ImageIcon down= new ImageIcon(downURL); public static URL rightURL=Date.class.getResource("statics/right.png"); public static ImageIcon right= new ImageIcon(rightURL); public static URL leftURL=Date.class.getResource("statics/left.png"); public static ImageIcon left= new ImageIcon(leftURL); public static URL foodURL=Date.class.getResource("statics/food.png"); public static ImageIcon food= new ImageIcon(foodURL); } package gui.game; import javax.swing.*; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyEvent; import java.awt.event.KeyListener; import java.util.Random; //游戏面板 public class GamePanel extends JPanel implements KeyListener, ActionListener { //绘制画板，游戏中的所有东西，都是由这个画笔来画 //绘制静态蛇 int length;//蛇的长度 int[] snakeX=new int[600];//25*25为1格 int[] snakeY=new int[600];//25*25为1格 String fx;//方向 //游戏当前的状态 boolean isstart=false;//游戏 //定时器 //Timer timer=new Timer(80,this);//100ms执行一次 //食物坐标 int foodx; int foody; boolean isFail=false;//判定是否失败 Random random = new Random(); int score; int time=80; //定时器 public GamePanel() { init(); //获得焦点和键盘情况 this.setFocusable(true);//获得焦点情况 this.addKeyListener(this);//获得键盘情况 Timer timer=new Timer(time,this);//100ms执行一次 timer.start(); //初始化食物 foodx=25+25*random.nextInt(34); foody=75+25*random.nextInt(24); } public void init(){//初始化 length=3; snakeX[0]=100;snakeY[0]=100;//头 snakeX[1]=75;snakeY[1]=100;//第一个身体 snakeX[2]=50;snakeY[2]=100;//第二个身体 fx="R"; score=0; } @Override protected void paintComponent(Graphics g) { super.paintComponent(g); //绘制静态面板 this.setBackground(Color.white); Date.header.paintIcon(this,g,25,11);//广告栏 g.fillRect(25,75,850,600);//默认界面 //画食物 Date.food.paintIcon(this,g,foodx,foody); //把小蛇画上去 if(fx.equals("R")) { Date.right.paintIcon(this, g, snakeX[0], snakeY[0]);//蛇头初始化向右 }else if(fx.equals("L")) { Date.left.paintIcon(this, g, snakeX[0], snakeY[0]); }else if(fx.equals("U")) { Date.up.paintIcon(this, g, snakeX[0], snakeY[0]); }else if(fx.equals("D")) { Date.down.paintIcon(this, g, snakeX[0], snakeY[0]); } for (int i = 1; i < length; i++) { Date.body.paintIcon(this,g,snakeX[i],snakeY[i]);//第一个身体 } //画积分 g.setColor(Color.WHITE); g.setFont(new Font("微软雅黑",Font.BOLD,18)); g.drawString("长度"+length,750,35); g.drawString("得分为"+score,750,55); //游戏状态 if(!isstart){ g.setColor(Color.WHITE); g.setFont(new Font("微软雅黑",Font.BOLD,40)); g.drawString("按下空格开始游戏",300,300); } if(isFail){ g.setColor(Color.RED); g.setFont(new Font("微软雅黑",Font.BOLD,40)); g.drawString("游戏失败,得分为："+score,300,300); } } @Override public void keyPressed(KeyEvent e) { int keyCode=e.getKeyCode();//获得按键是哪一个 if(keyCode==KeyEvent.VK_SPACE) { if(isFail){ isFail=false; init(); } isstart = !isstart;//取反 repaint(); } if(keyCode==KeyEvent.VK_UP && fx != "D") { fx="U"; }else if(keyCode==KeyEvent.VK_DOWN && fx != "U") { fx="D"; }else if(keyCode==KeyEvent.VK_LEFT && fx != "R"){ fx="L"; }else if(keyCode==KeyEvent.VK_RIGHT && fx != "L"){ fx="R"; } } //事件监听--固定事件来刷新 @Override public void actionPerformed(ActionEvent e) { if(isstart && !isFail){ //右移 for(int i = length-1;i>0;i--){ snakeX[i]= snakeX[i-1]; snakeY[i]= snakeY[i-1]; } //走向 if (fx.equals("R")) { snakeX[0] = snakeX[0] + 25; if (snakeX[0] > 850) { snakeX[0] = 25; } }else if (fx.equals("L")) { snakeX[0] = snakeX[0] - 25; if (snakeX[0] < 25) { snakeX[0] = 850; } }else if (fx.equals("U")) { snakeY[0] = snakeY[0] - 25; if (snakeY[0] <75) { snakeY[0] = 650; } }else if (fx.equals("D")) { snakeY[0] = snakeY[0] + 25; if (snakeY[0] > 650) { snakeY[0] = 75; } } //吃食物 if(snakeX[0]==foodx && snakeY[0]==foody){ length++;//长度加一 foodx=25+25*random.nextInt(34); foody=75+25*random.nextInt(24); score++; } //失败判断 for (int i = 1; i < length; i++) { if(snakeX[0]==snakeX[i] && snakeY[0]==snakeY[i] ){ isFail=true; } } repaint();//重置页面 } } @Override public void keyReleased(KeyEvent e) { } @Override public void keyTyped(KeyEvent e) { } } package gui.game; import javax.swing.*; //主启动类 public class Game { public static void main(String[] args) { JFrame frame = new JFrame(); frame.setBounds(10,10,900,750);//计算得到 frame.setResizable(false); frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); //正常游戏应该在面板上 frame.add(new GamePanel()); frame.setVisible(true); } }

图片素材来自狂神说

只是浅显的笔记为了自己以后复习用

最新回复(0)