Java Swing程序设计实战

目录一、按钮组件1.1 提交按钮组件1.2 复选框组件二、列表组件2.1 JComboBox类2.2 列表框组件三、文本组件3.1 文本框组件3.2 密码框3.3 文本域组件四、常用时间监听器4.1 动作事件监听器4.2 焦点事件监听器

一、按钮组件

1.1 提交按钮组件

package swing;import java.awt.*;import java.awt.event.*;import java.net.*;import javax.swing.*;public class JButtonTest extends JFrame {/** *  */private static final long serialVersionUID = 1L;public JButtonTest() {URL url = JButtonTest.class.getResource("imageButton.jpg");Icon icon = new ImageIcon(url);setLayout(new GridLayout(3, 2, 5, 5)); // 设置网格布局管理器Container c = getContentPane(); // 创建容器for (int i = 0; i < 5; i++) {// 创建按钮，同时设置按钮文字与图标JButton J = new JButton("button" + i, icon);c.add(J); // 在容器中添加按钮if (i % 2 == 0) {J.setEnabled(false); // 设置其中一些按钮不可用}}JButton jb = new JButton(); // 实例化一个没有文字与图片的按钮jb.setMaximumSize(new Dimension(90, 30)); // 设置按钮与图片相同大小jb.setIcon(icon); // 为按钮设置图标jb.setHideActionText(true);jb.setToolTipText("图片按钮"); // 设置按钮提示为文字jb.setBorderPainted(false); // 设置按钮边界不显示jb.addActionListener(new ActionListener() { // 为按钮添加监听事件public void actionPerformed(ActionEvent e) {// 弹出确认对话框JOptionPane.showMessageDialog(null, "弹出对话框");}});c.add(jb); // 将按钮添加到容器中setTitle("创建带文字与图片的按钮");setSize(350, 150);setVisible(true);setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);}public static void main(String args[]) {new JButtonTest();}}

1.2 复选框组件

import java.awt.*;import java.awt.event.*;import javax.swing.*;public class CheckBoxTest extends JFrame {    /**     *      */    private static final long serialVersionUID = 1L;    private JPanel panel1 = new JPanel();    private JPanel panel2 = new JPanel();    private JTextArea jt = new JTextArea(3, 10);    private JCheckBox jc1 = new JCheckBox("1");    private JCheckBox jc2 = new JCheckBox("2");    private JCheckBox jc3 = new JCheckBox("3");    public CheckBoxTest() {        Container c = getContentPane();        c.setLayout(new BorderLayout());        c.add(panel1, BorderLayout.NORTH);        final JScrollPane scrollPane = new JScrollPane(jt);        panel1.add(scrollPane);        c.add(panel2, BorderLayout.SOUTH);        panel2.add(jc1);        jc1.addActionListener(new ActionListener() {            public void actionPerformed(ActionEvent e) {                if (jc1.isSelected())                    jt.append("复选框1被选中\n");            }        });        panel2.add(jc2);        jc2.addActionListener(new ActionListener() {            public void actionPerformed(ActionEvent e) {                if (jc2.isSelected())                    jt.append("复选框2被选中\n");            }        });        panel2.add(jc3);        jc3.addActionListener(new ActionListener() {            public void actionPerformed(ActionEvent e) {                if (jc3.isSelected())                    jt.append("复选框3被选中\n");            }        });        setSize(200, 160);        setVisible(true);        setTitle("复选框的使用");        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);    }    public static void main(String[] args) {        new CheckBoxTest();    }}

二、列表组件

2.1 JComboBox类

import java.awt.*;import javax.swing.*;public class JComboBoxModelTest extends JFrame {private static final long serialVersionUID = 1L;JComboBox<String> jc = new JComboBox<>(new MyComboBox());JLabel jl = new JLabel("请选择证件");public JComboBoxModelTest() {setSize(new Dimension(160, 180));setVisible(true);setTitle("在窗口中设置下拉列表框");setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);Container cp = getContentPane();cp.setLayout(new FlowLayout());cp.add(jl);cp.add(jc);}public static void main(String[] args) {new JComboBoxModelTest();}}class MyComboBox extends AbstractListModel<String> implements ComboBoxModel<String> {/** *  */private static final long serialVersionUID = 1L;String selecteditem = null;String[] test = { "身份证", "军人证", "学生证", "工作证" };public String getElementAt(int index) {return test[index];}public int getSize() {return test.length;}public void setSelectedItem(Object item) {selecteditem = (String) item;}public Object getSelectedItem() {return selecteditem;}public int getIndex() {for (int i = 0; i < test.length; i++) {if (test[i].equals(getSelectedItem()))return i;}return 0;}}

2.2 列表框组件

import java.awt.*;import javax.swing.*;public class JListTest extends JFrame {/** *  */private static final long serialVersionUID = 1L;public JListTest() {Container cp = getContentPane();cp.setLayout(null);JList<String> jl = new JList<>(new MyListModel());JScrollPane js = new JScrollPane(jl);js.setBounds(10, 10, 100, 100);cp.add(js);setTitle("在这个窗体中使用了列表框");setSize(200, 150);setVisible(true);setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);}public static void main(String args[]) {new JListTest();}}class MyListModel extends AbstractListModel<String> {/** *  */private static final long serialVersionUID = 1L;private String[] contents = { "列表1", "列表2", "列表3", "列表4", "列表5", "列表6" };public String getElementAt(int x) {if (x < contents.length)return contents[x++];elsereturn null;}public int getSize() {return contents.length;}}

三、文本组件

3.1 文本框组件

import java.awt.*;import java.awt.event.*;import javax.swing.*;public class JTextFieldTest extends JFrame {/** *  */private static final long serialVersionUID = 1L;public JTextFieldTest() {setSize(250, 100);setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);Container cp = getContentPane();getContentPane().setLayout(new FlowLayout());final JTextField jt = new JTextField("aaa", 20);final JButton jb = new JButton("清除");cp.add(jt);cp.add(jb);jt.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent arg0) {// TODO 自动生成方法存根jt.setText("触发事件");}});jb.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent arg0) {jt.setText("");jt.requestFocus();}});setVisible(true);}public static void main(String[] args) {new JTextFieldTest();}}

3.2 密码框

import java.awt.*;import java.awt.event.*;import javax.swing.*;public class JTextFieldTest extends JFrame {/** *  */private static final long serialVersionUID = 1L;public JTextFieldTest() {setSize(250, 100);setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);Container cp = getContentPane();getContentPane().setLayout(new FlowLayout());//final JTextField jt=new JTextField("aaa",20);JPasswordField jp = new JPasswordField("", 20);jp.setEchoChar('*');final JButton jb = new JButton("清除");cp.add(jp);cp.add(jb);jp.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent arg0) {// TODO 自动生成方法存根jp.setText("触发事件");}});jb.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent arg0) {jp.setText("");jp.requestFocus();}});setVisible(true);}public static void main(String[] args) {new JTextFieldTest();}}

3.3 文本域组件

import java.awt.*;import javax.swing.*;public class JTextAreaTest extends JFrame {public JTextAreaTest() {setSize(200, 100);setTitle("定义自动换行的文本域");setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);Container cp = getContentPane();JTextArea jt = new JTextArea("文本域", 6, 6);jt.setLineWrap(true);cp.add(jt);setVisible(true);}public static void main(String[] args) {new JTextAreaTest();}}

四、常用时间监听器

4.1 动作事件监听器

import java.awt.*;import java.awt.event.*;import javax.swing.*;public class SimpleEvent extends JFrame {/** *  */private static final long serialVersionUID = 1L;private JButton jb = new JButton("我是按钮，点击我");public SimpleEvent() {setLayout(null);setSize(200, 100);setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);Container cp = getContentPane();cp.add(jb);jb.setBounds(10, 10, 100, 30);jb.addActionListener(new jbAction());setVisible(true);}class jbAction implements ActionListener {public void actionPerformed(ActionEvent arg0) {jb.setText("我被单击了");}}public static void main(String[] args) {new SimpleEvent();}}

4.2 焦点事件监听器

import java.awt.*;import java.awt.event.*;import javax.swing.*;public class FocusEventTest extends JFrame {/** *  */private static final long serialVersionUID = 1L;public FocusEventTest() {setSize(250, 100);setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);Container cp = getContentPane();getContentPane().setLayout(new FlowLayout());final JLabel label = new JLabel();getContentPane().add(label);JTextField jt = new JTextField("请单击其他文本框", 10);JTextField jt2 = new JTextField("请单击我", 10);cp.add(jt);cp.add(jt2);jt.addFocusListener(new FocusListener() {// 组件失去焦点时调用的方法public void focusLost(FocusEvent arg0) {JOptionPane.showMessageDialog(null, "文本框失去焦点");}// 组件获取键盘焦点时调用的方法public void focusGained(FocusEvent arg0) {}});setVisible(true);}public static void main(String[] args) {new FocusEventTest();}}

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