JavaGUI-02-Swing

Swing简介

Swing封装了AWT(AWT更底层)

1.窗口-JFrame

public class JFrameDemo {
    public static void main(String[] args) {
        MyJFrame jf = new MyJFrame("jf");
        jf.init();
    }
}

class MyJFrame extends JFrame{

    public MyJFrame(String title){
        this.setTitle(title);
    }

    //初始化
    public void init(){
        //获得一个容器
        Container container = this.getContentPane();
        container.setBackground(Color.black);

        this.setBounds(300,300,200,200);
        this.setVisible(true);

        JLabel jlabel = new JLabel(this.getTitle());
        //设置文本居中
        jlabel.setHorizontalAlignment(SwingConstants.CENTER);

        this.add(jlabel);

        //设置关闭事件
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
}

2.弹窗-JDialog

public class DialogDemo {
    public static void main(String[] args) {
        new MainJFrame().init();
    }
}

//主窗口
class MainJFrame extends JFrame{
    public void init(){
        this.setBounds(200,200,500,400);
        this.setVisible(true);
        //添加窗口关闭事件
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        //拿到容器(用容器来放组件)
        Container container = this.getContentPane();
        //设置为绝对布局(通过坐标指定组件的位置)
        container.setLayout(null);

        JButton jButton = new JButton("Button");
        jButton.setBounds(0,0,100,50);
        //点击这个按钮打开一个弹窗
        jButton.addActionListener(new ActionListener() {//监听器
            @Override
            public void actionPerformed(ActionEvent actionEvent) {
                //实例化弹窗
                MyDialog myDialog = new MyDialog();
                myDialog.init();
            }
        });

        container.add(jButton);
    }
}

//弹窗
class MyDialog extends JDialog{
    public void init(){
        //注意JDialog默认有窗口关闭事件 不用自己添加
        this.setBounds(500,100,200,100);
        this.setVisible(true);

        Container container = this.getContentPane();

        JLabel jLabel = new JLabel("this is a dialog");

        container.add(jLabel);
    }
}
image-20220405152826788

3.标签

文字lable

new JLable("xxx");

有ICON的Lable

1.用Java绘制的Icon

public class Lable_IconDemo {
    public static void main(String[] args) {
        new MainFrame().init();
    }
}

class MainFrame extends JFrame{
    public void init(){
        this.setBounds(200,200,300,200);
        this.setVisible(true);

        //实例化一个带有Icon的JLable
        //JLabel(标签的名字, Icon, 标签的位置)
        JLabel jLabel = new JLabel(" Icon'name ", new MyIcon(15, 15), SwingConstants.CENTER);

        Container container = this.getContentPane();
        container.add(jLabel);
    }
}

//implements Icon接口,需要实现接口的所有方法
class MyIcon implements Icon{

    //参数
    private int width = 0;
    private int height = 0;

    MyIcon(){}//无参构造

    MyIcon(int width, int height){
        this.width = width;
        this.height = height;
    }

    @Override
    public void paintIcon(Component component, Graphics graphics, int x, int y) {
        //画Icon (xy坐标会根据jLabel的文字部分匹配,默认放在文字之前)
        graphics.fillOval(x, y, this.width, this.height);
    }

    @Override
    public int getIconWidth() {
        return this.width;
    }

    @Override
    public int getIconHeight() {
        return this.height;
    }
}
image-20220405171438329

2.使用准备好的图片作为Icon

public class Lable_ImageIconDemo {
    public static void main(String[] args) {
        new MyFrame().init();
    }
}

class MyFrame extends JFrame{
    public void init(){
        this.setBounds(200,200,300,200);
        this.setVisible(true);


        //Home标签
        JLabel jLabel = new JLabel("  Home  ");

        //获取图片的地址(url)
        //xxx.class.getResource() 获取与xxx类同级路径下的资源
        URL home_png_url = MyFrame.class.getResource("home.png");
        //实例化ImageIcon
        ImageIcon Home_Icon = new ImageIcon(home_png_url);
        //添加Icon
        jLabel.setIcon(Home_Icon);
        //设置居中
        jLabel.setHorizontalAlignment(SwingConstants.CENTER);


        Container container = this.getContentPane();
        container.add(jLabel);
    }
}
image-20220405175527483

4.面板

简单使用

public class JPanelDemo {
    public static void main(String[] args) {
        new MyJF().init();
    }
}

class MyJF extends JFrame{
    public void  init(){
        this.setBounds(200,200,400,300);
        this.setVisible(true);

        Container container = this.getContentPane();

        container.setLayout(new GridLayout(2,2,15,10));//后面两个参数是行列间距

        JPanel jPanel1 = new JPanel(new GridLayout(1,1));
        JPanel jPanel2 = new JPanel(new GridLayout(2,1));
        JPanel jPanel3 = new JPanel(new GridLayout(3,1));
        JPanel jPanel4 = new JPanel(new GridLayout(4,1));

        jPanel1.add(new JButton("1"));

        jPanel2.add(new JButton("2"));
        jPanel2.add(new JButton("2"));

        jPanel3.add(new JButton("3"));
        jPanel3.add(new JButton("3"));
        jPanel3.add(new JButton("3"));

        jPanel4.add(new JButton("4"));
        jPanel4.add(new JButton("4"));
        jPanel4.add(new JButton("4"));
        jPanel4.add(new JButton("4"));

        container.add(jPanel1);
        container.add(jPanel2);
        container.add(jPanel3);
        container.add(jPanel4);
    }
}
image-20220405205717698

实现滚动条-JScrollPanel

public class JScrollPanel_Demo {
    public static void main(String[] args) {
        new MyTextJF().init();
    }
}

class MyTextJF extends JFrame{
    public void init(){
        this.setBounds(200,200,300,200);
        this.setVisible(true);

        JTextArea jTextArea = new JTextArea();
        jTextArea.setText("请输入文字：");
        //把文本域放到面板
        JScrollPane jScrollPane = new JScrollPane(jTextArea);

        Container container = this.getContentPane();
        //把面板放到文本域
        container.add(jScrollPane);
    }
}
image-20220405211452555

5.按钮

  • 图片按钮
public class JButton_IconButton_Test {
    public static void main(String[] args) {
        new MyFrame01().init();
    }
}

class MyFrame01 extends JFrame{
    public void init(){
        this.setBounds(200,200,600,500);
        this.setVisible(true);

        //把图片变成Icon
        URL resource = MyFrame01.class.getResource("home.png");

        ImageIcon home_Icon = new ImageIcon(resource);
        //按钮
        JButton jButton = new JButton();
        //设置按钮Icon
        jButton.setIcon(home_Icon);
        //设置提示文字
        jButton.setToolTipText("return home");

        Container container = this.getContentPane();
        container.add(jButton,BorderLayout.SOUTH);
    }
}
image-20220405214323354
  • 单选按钮-radioButton
public class JRadioButton_Demo02 {
    public static void main(String[] args) {
        new MyFrame02().init();
    }
}

class MyFrame02 extends JFrame {
    public void init(){
        this.setBounds(200,200,600,500);
        this.setVisible(true);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        //单选按钮
        JRadioButton jRadioButton1 = new JRadioButton("jRadioButton1");
        JRadioButton jRadioButton2 = new JRadioButton("jRadioButton2");
        JRadioButton jRadioButton3 = new JRadioButton("jRadioButton3");
        //添加到同一个组中，一个组中只能选择一个
        ButtonGroup buttonGroup = new ButtonGroup();
        buttonGroup.add(jRadioButton1);
        buttonGroup.add(jRadioButton2);
        buttonGroup.add(jRadioButton3);

        Container container = this.getContentPane();
        container.add(jRadioButton1,BorderLayout.NORTH);
        container.add(jRadioButton2,BorderLayout.CENTER);
        container.add(jRadioButton3,BorderLayout.SOUTH);
    }
}
image-20220405215705497
  • 复选按钮
public class JCheckBox_Test {
    public static void main(String[] args) {
        new MyFrame03().init();
    }
}

class MyFrame03 extends JFrame {
    public void init(){
        this.setBounds(200,200,600,500);
        this.setVisible(true);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        //复选框
        JCheckBox jCheckBox1 = new JCheckBox("jCheckBox1");
        JCheckBox jCheckBox2 = new JCheckBox("jCheckBox2");

        Container container = this.getContentPane();
        container.add(jCheckBox1,BorderLayout.NORTH);
        container.add(jCheckBox2,BorderLayout.SOUTH);
    }
}

image-20220405220359199

6.列表

  • 下拉框
public class ComboBox_Test {
    public static void main(String[] args) {
        new MyFrame01().init();
    }
}

class MyFrame01 extends JFrame {
    public void init(){
        this.setBounds(200,200,600,500);
        this.setVisible(true);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        JComboBox status = new JComboBox();
        status.addItem(null);
        status.addItem("A: Right");
        status.addItem("B: Wrong");

        Container container = this.getContentPane();

        container.add(status, BorderLayout.NORTH);
    }
}
image-20220405221538326
  • 列表框
public class JList_Test {
    public static void main(String[] args) {
        new MyFrame02().init();
    }
}

class MyFrame02 extends JFrame {
    public void init(){
        this.setBounds(200,200,600,500);
        this.setVisible(true);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        Vector contents = new Vector();
        JList jList = new JList(contents);

        contents.add("Godot");
        contents.add("Unity");
        contents.add("Unreal");

        Container container = this.getContentPane();

        container.add(jList);
    }
}
image-20220405222447734
image-20220405222615721

7.文本

  • 文本框
image-20220405223055628
  • 密码框
image-20220405223216178
  • 文本域
image-20220405223347308

GUI编程总结

image-20220405224038573 image-20220405224130932
posted @ 2022-04-05 22:48  Cornfield_Chase  阅读(24)  评论(0)  编辑  收藏  举报