Swing UI——基本组件（二）

目录

ImageIcon：图标类（Icon 接口的实现类）

JLabel：标签

JTextField：文本框

JTextArea：文本域

JPasswordField：密码框

JButton：按钮

JRadioButton：单选按钮

ButtonGroup：按钮组：与单选按钮结合使用

JCheckBox：复选框

JList：列表

JComboBox：下拉列表

JMenuBar：菜单工具栏

JMenu：菜单

JMenuItem：菜单项

JPopupMenu：弹出式菜单

JToolBar：工具条、JToolTip：提示工具

JProgressBar：进度条

JSlider：滑块

JSpinner：微调器

---

ImageIcon：图标类（Icon 接口的实现类）

import javax.swing.*;
import java.awt.*;
public class ImageIcon_MainClass{
    public static void main(String[] args) {
        Icon_ImageIcon icon_imageIcon = new Icon_ImageIcon();
    }
}
class Icon_ImageIcon extends JFrame {
    private JPanel panel;
    private ImageIcon imageIcon;
    public Icon_ImageIcon(){
        super("Icon接口——ImageIcon类");
        panel = new JPanel();
        imageIcon = new ImageIcon("images\\2.png"); //  创建ImageIcon图标
        this.setIconImage(imageIcon.getImage());    //  设置窗体的Icon
        this.add(panel);
        this.setSize(500,300);
        this.setLocation(200,100);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setVisible(true);
    }
    public void paint(Graphics graphics){
        ImageIcon imageIcon = new ImageIcon("images\\1.png"); //  创建ImageIcon图标
        graphics.drawImage(imageIcon.getImage(),0,20,this);   //  在窗体中画图标
        graphics.drawString("宽:"+imageIcon.getIconWidth()+"px," +  //  显示图标的宽度和高度
                        "高:" +imageIcon.getIconHeight()+"px",
                20,210);
    }
}

 

---

JLabel：标签

• 标签内容一般不需要改变，但也可以使用setText和setIcon方法进行改变
• 例如当使用同一标签显示不同的图片时，就可使用setIcon方法实现  

import javax.swing.*;
import java.awt.*;
public class JLabel_3{
    public static void main(String[] args) {
        MyJLabel myJLabel = new MyJLabel();
    }
}
class MyJLabel extends JFrame {
    private JPanel panel;
    private JLabel textLabel,iconLabel,addLabel;
    public MyJLabel(){
        super("JLabel");
        panel = new JPanel(new GridLayout(3,1));
        textLabel = new JLabel("这是一个文本标签");
        iconLabel = new JLabel(new ImageIcon("images\\e.png"));
        addLabel = new JLabel("商标",new ImageIcon("images\\e.png"),SwingConstants.CENTER);
        panel.add(textLabel);
        panel.add(iconLabel);
        panel.add(addLabel);
        this.add(panel);
        this.setSize(400,300);
        this.setLocation(200,100);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setVisible(true);
    }
}

 

---

JTextField：文本框

import javax.swing.*;
 
public class Text_3{
    public static void main(String[] args) {
        MyJText myJLabel = new MyJText();
    }
}
class MyJText extends JFrame {
    private JLabel label;
    private JTextField textField;
    private JPanel panel;
    public MyJText(){
        super("JTextArea");
        panel = new JPanel();
        label = new JLabel("文本框：");
        textField = new JTextField(10);    // 指定长度的文本框
        textField.setText("文本框的内容");
        panel.add(label);
        panel.add(textField);
        this.add(panel);
        this.setSize(400,300);
        this.setLocation(200,100);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setVisible(true);
    }
}

 

---

JTextArea：文本域

import javax.swing.*;
 
public class Text_3{
    public static void main(String[] args) {
        MyJText myJLabel = new MyJText();
    }
}
class MyJText extends JFrame {
    private JTextArea textArea;
    private JLabel label;
    private JPanel panel;
    public MyJText(){
        super("JTextArea");
        panel = new JPanel();
        label = new JLabel("文本域：");
        textArea = new JTextArea(10,20); 
        textArea.setText("文本框的内容");
        this.add(label);
        panel.add(textArea);
        this.add(panel);
        this.setSize(400,300);
        this.setLocation(200,100);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setVisible(true);
    }
}

---

JPasswordField：密码框

package tes_5;
 
import javax.swing.*;
 
public class MainClass {
    public static void main(String[] args) {
        MyFrame myFrame = new MyFrame();
    }
}
class MyFrame extends JFrame {
    private JPanel panel;
    private JLabel label;
    private JPasswordField passwordField;
    public MyFrame(){
        super("-----密码框-----");
        panel = new JPanel();
        label = new JLabel("密码框：");
        passwordField = new JPasswordField(10); // 创建一个指定长度的密码框
        passwordField.setEchoChar('*');         // 设置回显字符
        panel.add(passwordField);
        panel.add(label);
        this.add(panel);
        this.setLocation(300,400);
        this.setSize(300,150);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setVisible(true);
    }
}

---

JButton：按钮

import javax.swing.*;
import java.awt.event.*;
 
public class MainClass{
   public static void main(String[] args) {
        new JButton_4();
    }
}
 
class JButton_4 extends JFrame {
    private JPanel panel;
    private JButton TextButton,IconButton;
    public JButton_4(){
        super("JButton");
        panel = new JPanel();
        TextButton = new JButton("您点击了0次按钮！");                  // 指定文本的按钮
        IconButton = new JButton(new ImageIcon("images\\dialog.png")); // 指定图标的按钮
        panel.add(TextButton);
        panel.add(IconButton);
        this.add(panel);
        this.setSize(400,400);
        this.setLocation(200,100);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setVisible(true);
    }
 
 
}

 

---

JRadioButton：单选按钮

ButtonGroup：按钮组：与单选按钮结合使用
 

public class MainClass{
     public static void main(String[] args) {
        new JRadioButton_9();
    }
}
class JRadioButton_9 extends JFrame {
    private JPanel panelSex;
    private JLabel labelSex;
    private ButtonGroup buttonGroup;
    private JRadioButton buttonMale,buttonFemale;
    public JRadioButton_JCheckBox_9(){
        super("JRadioButton");
        panelSex = new JPanel(new FlowLayout(FlowLayout.LEFT));
        labelSex = new JLabel("性别：");
        buttonMale = new JRadioButton("男",true); // 性别为男的单选按钮被选中
        buttonFemale = new JRadioButton("女");
        buttonGroup = new ButtonGroup();
        buttonGroup.add(buttonMale);
        buttonGroup.add(buttonFemale);
        panelSex.add(labelSex);
        panelSex.add(buttonMale);
        panelSex.add(buttonFemale);
        this.add(panelSex);
        this.setSize(300,100);
        this.setLocation(200,100);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setVisible(true);
    }
   
}

---

JCheckBox：复选框

package tes_8;
 
import javax.swing.*;
import java.awt.*;
public class MainClass{
      public static void main(String[] args) {
        new JCheckBox_9();
    }
}
class JCheckBox_9 extends JFrame {
    private JPanel panelHobby;
    private JLabel labelHobby;
    private JCheckBox boxRead,boxOnline,boxSwim,boxTravel;
    public JCheckBox_9(){
        super("JCheckBox");
        panelHobby = new JPanel(new FlowLayout(FlowLayout.LEFT));
        labelHobby = new JLabel("爱好：");
        boxRead = new JCheckBox("阅读",true); // 阅读的复选框被选中
        boxOnline = new JCheckBox("上网");
        boxSwim = new JCheckBox("游泳",true); // 游泳的复选框被选中
        boxTravel = new JCheckBox("旅游");
        panelHobby.add(labelHobby);
        panelHobby.add(boxRead);
        panelHobby.add(boxOnline);
        panelHobby.add(boxSwim);
        panelHobby.add(boxTravel);
        this.add(panelHobby);
        this.setSize(300,100);
        this.setLocation(200,100);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setVisible(true);
    }
}

---

JList：列表

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
 
public class MainClass{
      public static void main(String[] args) {
        new JList_8();
    }
}
 
class JList_8 extends JFrame {
    private JPanel panel;
    private JList list1,list2;
    private JButton button1,button2;
    private DefaultListModel model;
    /*
        DefaultListModel类用于创建一个默认的列表值模型，
        使用值模型可以对列表中的选项内容进行添加或删除操作
     */
    public JList_8(){
        super("JList");
        setLayout(new GridLayout(1,3));
        panel = new JPanel(new GridLayout(2,1));
        button1 = new JButton("→");
        button2 = new JButton("←");
        model = new DefaultListModel();
        list1 = new JList(new String[]{"看书","写字","画画","爬山","跑步","游泳"}); //指定内容的列表
        list2 = new JList(); // 空列表
        list2.setModel(model);     
        panel.add(button1);
        panel.add(button2);
        add(list1);
        add(panel);
        add(list2);
        setSize(500,300);
        setLocation(500,250);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true);
    }
}

 

---

JComboBox：下拉列表

注意编辑只会影响当前项，它不会改变列表的内容

 
import javax.swing.*;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
 
public class MainClass{
    public static void main(String[] args) {
        new JComboBox_7();
    }
}
 
class JComboBox_7 extends JFrame {
    private JPanel panel;
    private JLabel label1,label2;
    private JComboBox comboBox1,comboBox2;
    public JComboBox_7(){
        super("JComboBox");
        panel = new JPanel();
        label1 = new JLabel("省份");
        label2 = new JLabel("城市");
        comboBox1 = new JComboBox(new String[]{"北京","上海","广东","安徽"});// 指定数组内容的下拉列表
        comboBox2 = new JComboBox(); // 空的下拉列表
        panel.add(label1);
        panel.add(comboBox1);
        panel.add(label2);
        panel.add(comboBox2);
        this.add(panel);
        this.setSize(300,200);
        this.setLocation(200,100);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setVisible(true);
    }
 
    
}

---

JMenuBar：菜单工具栏

JMenu：菜单

JMenuItem：菜单项

 
import javax.swing.*;
 
public class MainClass{
    public static void main(String[] args) {
       new JMenu_14();
    }
}
class JMenu_14 extends JFrame {
    private JMenuBar menuBar;
    private JMenu menuFile,menuEdit,menuHelp,menuNew;
    private JMenuItem itemSave,itemExit,itemCopy,itemPost,
            itemAbout,itemClass,itemJava,itemOther;
    public JMenu_14(){
        super("下拉式菜单");
        menuBar = new JMenuBar();        // 造一个菜单栏对象
 
        menuFile = new JMenu("File");    // 造菜单
        menuEdit = new JMenu("Edit");
        menuHelp = new JMenu("Help");
        menuNew = new JMenu("New");
 
        itemSave = new JMenuItem("Save");// 造菜单项
        itemExit = new JMenuItem("Exit");
        itemCopy = new JMenuItem("Copy");
        itemPost = new JMenuItem("Post");
        itemAbout = new JMenuItem("About");
        itemClass = new JMenuItem("Class");
        itemJava = new JMenuItem("Java Script");
        itemOther = new JMenuItem("Other....");
 
    //  将菜单添加到菜单栏
        menuBar.add(menuFile);
        menuBar.add(menuEdit);
        menuBar.add(menuHelp);
 
   //   将子菜单、菜单项添加到菜单
        menuFile.add(menuNew);
        menuFile.addSeparator();   // 添加一条分割线
        menuFile.add(itemSave);
        menuFile.add(itemExit);
        menuNew.add(itemClass);
        menuNew.add(itemJava);
        menuNew.add(itemOther);
        menuEdit.add(itemCopy);
        menuEdit.add(itemPost);
        menuHelp.add(itemAbout);
        this.setJMenuBar(menuBar); // 将菜单栏添加到窗体顶部
        this.setSize(400,300);
        this.setLocation(200,100);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setVisible(true);
    }
}

---

JPopupMenu：弹出式菜单

 
import javax.swing.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
 
public class MainClass{
     public static void main(String[] args) {
        new JPopupMenu_15();
    }
}
class JPopupMenu_15 extends JFrame {
    private JPanel panel;
    private JPopupMenu popupMenu;
    private JMenuItem Undo,Copy,Post,Cut;
    public JPopupMenu_15(){
        super("JPopupMenu弹出式菜单");
        panel = new JPanel();
        popupMenu = new JPopupMenu();   // 造一个弹出式菜单对象
        Undo = new JMenuItem("Undo");
        Copy = new JMenuItem("Copy");
        Post = new JMenuItem("Post");
        Cut = new JMenuItem("Cut");
 
    //  将菜单项添加到弹出式菜单
        popupMenu.add(Undo);
        popupMenu.addSeparator();
        popupMenu.add(Copy);
        popupMenu.add(Post);
        popupMenu.add(Cut);
 
   
 //  事件监听（请看其它章节）
 //  在面板任意位置右击的时候，显示弹出式菜单
        panel.addMouseListener(new MouseAdapter(){
            @Override
            public void mouseClicked(MouseEvent e) {
                if(e.getButton() == MouseEvent.BUTTON3){
                    int x = e.getX();
                    int y = e.getY();
                    popupMenu.show(panel,x,y);
                }
            }
        });
        this.add(panel);
        this.setSize(400,300);
        this.setLocation(200,100);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setVisible(true);
    }
}

---

JToolBar：工具条、JToolTip：提示工具

package tes_9;
 
import javax.swing.*;
import java.awt.*;
 
public class MainClass{
    public static void main(String[] args) {
        new JToolBar_16();
    }
}
 
class JToolBar_16 extends JFrame {
    private JToolBar toolBar;
    private JButton btnSave,btnPreview,btnDownload,btnSelect,btnDelete;
    public JToolBar_16(){
        super("JToolBar工具栏");
        toolBar = new JToolBar(); // 造一个工具栏对象
 
        //  指定按钮的内容和图标
        btnSave = new JButton("保存",new ImageIcon("images/5.jpg"));
        btnPreview = new JButton("预览",new ImageIcon("images/3.jpg"));
        btnDownload = new JButton("下载",new ImageIcon("images/4.jpg"));
        btnSelect = new JButton("查询",new ImageIcon("images/2.jpg"));
        btnDelete = new JButton("删除",new ImageIcon("images/1.jpg"));
 
        //  设置工具提示文本
        btnSave.setToolTipText("保存");
        btnPreview.setToolTipText("预览");
        btnDownload.setToolTipText("下载");
        btnSelect.setToolTipText("查询");
        btnDelete.setToolTipText("删除");
 
        //  将按钮添加到工具栏
        toolBar.add(btnSave);
        toolBar.add(btnPreview);
        toolBar.add(btnDownload);
        toolBar.add(btnSelect);
        toolBar.add(btnDelete);
 
        this.add(toolBar, BorderLayout.NORTH);// 将工具栏添加到窗体北边
        this.setSize(400,200);
        this.setLocation(200,100);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setVisible(true);
    }
}

---

JProgressBar：进度条

package tes_5;
 
import javax.swing.*;
 
public class MainClass {
    public static void main(String[] args) {
        MyFrame myFrame = new MyFrame();
    }
}
class MyFrame extends JFrame {
    private JPanel panel;
    private JLabel label;
    private JProgressBar progressBar;
    public MyFrame(){
        super("JProgressBar进度条");
        panel = new JPanel();
        label = new JLabel("进度条：");
        progressBar = new JProgressBar(0,100);// 指定最小值、最大值的水平进度条
        progressBar.setValue(50);             // 设置水平条当前值
        panel.add(label);
        panel.add(progressBar);
        this.add(panel);
        this.setLocation(300,400);
        this.setSize(300,150);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setVisible(true);
    }
}

 

---

JSlider：滑块

 
 
import javax.swing.*;
 
public class MainClass {
    public static void main(String[] args) {
        MyFrame myFrame = new MyFrame();
    }
}
class MyFrame extends JFrame {
    private JPanel panel;
    private JLabel label;
    private JSlider slider;
    public MyFrame(){
        super("JSlider滑块");
        panel = new JPanel();
        label = new JLabel("滑块：");
        slider = new JSlider(0,100);// 指定最小值、最大值的滑块
        slider.setValue(75);        // 设置当前滑块的值
        panel.add(label);
        panel.add(slider);
        this.add(panel);
        this.setLocation(300,400);
        this.setSize(300,150);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setVisible(true);
    }
}

---

JSpinner：微调器

---

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