学生作业 Java课后实战训练源码.zip

import java.awt.BorderLayout; import java.awt.EventQueue; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.border.EmptyBorder; import java.awt.Color; import java.awt.Component; import javax.swing.JButton; import java.awt.Font; import javax.swing.SwingConstants; import javax.swing.border.TitledBorder; import java.awt.event.KeyAdapter; import java.awt.event.KeyEvent; import java.util.ArrayList; import javax.swing.JTextField; /** * 虚拟键盘(键盘的按下与释放) */ public class KeyBoard extends JFrame { //创建“键盘”类继承JFrame //声明窗体中的成员组件 private JPanel contentPane; private JTextField textField; private JButton btnQ; private JButton btnW; private JButton btnE; private JButton btnR; private JButton btnT; private JButton btnY; private JButton btnU; private JButton btnI; private JButton btnO; private JButton btnP; private JButton btnA; private JButton btnS; private JButton btnD; private JButton btnF; private JButton btnG; private JButton btnH; private JButton btnJ; private JButton btnK; private JButton btnL; private JButton btnZ; private JButton btnX; private JButton btnC; private JButton btnV; private JButton btnB; private JButton btnN; private JButton btnM; Color green=Color.GREEN;//定义Color对象，用来表示按下键的颜色 Color white=Color.WHITE;//定义Color对象，用来表示释放键的颜色 ArrayList<JButton> btns=new ArrayList<JButton>();//定义一个集合，用来存储所有的按键ID //自定义一个方法，用来将容器中的所有JButton组件添加到集合中 private void addButtons(){ for(Component cmp :contentPane.getComponents()){//遍历面板中的所有组件 if(cmp instanceof JButton){//判断组件的类型是否为JButton类型 btns.add((JButton)cmp);//将JButton组件添加到集合中 } } } /** * 主方法 */ public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { //使得Runnable中的的run()方法在the system EventQueue的指派线程中被调用 public void run() { try { KeyBoard frame = new KeyBoard(); //创建KeyBoard对象 frame.setVisible(true); //使frame可视 frame.addButtons();//初始化存储所有按键的集合 } catch (Exception e) { e.printStackTrace(); } } }); } /** * 创建JFrame窗体 */ public KeyBoard() { //KeyBoard的构造方法 setTitle("虚拟键盘"); //设置窗体题目 setResizable(false); //不可改变窗体宽高 setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //设置窗体关闭的方式 setBounds(100, 100, 561, 280); //设置窗体的位置和宽高 /** * 创建JPanel面板contentPane置于JFrame窗体中，并设置面板的背景色、边距和布局 */ contentPane = new JPanel(); contentPane.setBackground(Color.WHITE); contentPane.setBorder(new EmptyBorder(5, 5, 5, 5)); setContentPane(contentPane); contentPane.setLayout(null); /** * 创建按钮button置于面板contentPane中，设置按钮的背景色、位置、宽高以及按钮中的字体位置、内容、样式 */ btnQ = new JButton("Q"); btnQ.setBackground(white); btnQ.setVerticalAlignment(SwingConstants.TOP); btnQ.setHorizontalAlignment(SwingConstants.LEADING); btnQ.setFont(new Font("Times New Roman", Font.PLAIN, 16)); btnQ.setBounds(0, 60, 50, 45); contentPane.add(btnQ); /** * 创建按钮button_2置于面板contentPane中，设置按钮的背景色、位置、宽高以及按钮中的字体位置、内容、样式 */ btnW = new JButton("W"); btnW.setBackground(white); btnW.setVerticalAlignment(SwingConstants.TOP); btnW.setHorizontalAlignment(SwingConstants.LEADING); btnW.setFont(new Font("Times New Roman", Font.PLAIN, 16)); btnW.setBounds(55, 60, 50, 45); contentPane.add(btnW); /** * 创建按钮button_3置于面板contentPane中，设置按钮的背景色、位置、宽高以及按钮中的字体位置、内容、样式 */ btnE = new JButton("E"); btnE.setBackground(white); btnE.setVerticalAlignment(SwingConstants.TOP); btnE.setHorizontalAlignment(SwingConstants.LEADING); btnE.setFont(new Font("Times New Roman", Font.PLAIN, 16)); btnE.setBounds(110, 60, 50, 45); contentPane.add(btnE); /** * 创建按钮button_4置于面板contentPane中，设置按钮的背景色、位置、宽高以及按钮中的字体位置、内容、样式 */ btnR = new JButton("R"); btnR.setBackground(white); btnR.setVerticalAlignment(SwingConstants.TOP); btnR.setHorizontalAlignment(SwingConstants.LEADING); btnR.setFont(new Font("Times New Roman", Font.PLAIN, 16)); btnR.setBounds(165, 60, 50, 45); contentPane.add(btnR); /** * 创建按钮button_5置于面板contentPane中，设置按钮的背景色、位置、宽高以及按钮中的字体位置、内容、样式 */ btnF = new JButton("F"); btnF.setBackground(white); btnF.setVerticalAlignment(SwingConstants.TOP); btnF.setHorizontalAlignment(SwingConstants.LEADING); btnF.setFont(new Font("Times New Roman", Font.PLAIN, 16)); btnF.setBounds(195, 125, 50, 45); contentPane.add(btnF); /** * 创建按钮button_6置于面板contentPane中，设置按钮的背景色、位置、宽高以及按钮中的字体位置、内容、样式 */ btnD = new JButton("D"); btnD.setBackground(white); btnD.setVerticalAlignment(SwingConstants.TOP); btnD.setHorizontalAlignment(SwingConstants.LEADING); btnD.setFont(new Font("Times New Roman", Font.PLAIN, 16)); btnD.setBounds(137, 125, 50, 45); contentPane.add(btnD); btnT = new JButton("T"); btnT.setVerticalAlignment(SwingConstants.TOP); btnT.setHorizontalAlignment(SwingConstants.LEADING); btnT.setFont(new Font("Times New Roman", Font.PLAIN, 16)); btnT.setBackground(white); btnT.setBounds(220, 60, 50, 45); contentPane.add(btnT); btnY = new JButton("Y"); btnY.setVerticalAlignment(SwingConstants.TOP); btnY.setHorizontalAlignment(SwingConstants.LEADING); btnY.setFont(new Font("Times New Roman", Font.PLAIN, 16)); btnY.setBackground(white); btnY.setBounds(275, 60, 50, 45); contentPane.add(btnY); btnU = new JButton("U"); btnU.setVerticalAlignment(SwingConstants.TOP); btnU.setHorizontalAlignment(SwingConstants.LEADING); btnU.setFont(new Font("Times New Roman", Font.PLAIN, 16)); btnU.setBackground(white); btnU.setBounds(330, 60, 50, 45); contentPane.add(btnU); btnI = new JButton("I"); btnI.setVerticalAlignment(SwingConstants.TOP); btnI.setHorizontalAlignment(SwingConstants.LEADING); btnI.setFont(new Font("Times New Roman", Font.PLAIN, 16)); btnI.setBackground(white); btnI.setBounds(385, 60, 50, 45); contentPane.add(btnI); btnO = new JButton("O"); btnO.setVerticalAlignment(SwingConstants.TOP); btnO.setHorizontalAlignment(SwingConstants.LEADING); btnO.setFont(new Font("Times New Roman", Font.PLAIN, 16)); btnO.setBackground(white); btnO.setBounds(440, 60, 50, 45); contentPane.add(btnO); btnP = new JButton("P"); btnP.setVerticalAlignment(SwingConstants.TOP); btnP.setHorizontalAlignment(SwingConstants.LEADING); btnP.setFont(new Font("Times New Roman", Font.PLAIN, 16)); btnP.setBackground(white); btnP.setBounds(495, 60, 50, 45); contentPane.add(btnP); btnA = new JButton("A"); btnA.setVerticalAlignment(SwingConstants.TOP); btnA.setHorizontalAlignment(SwingConstants.LEADING); btnA.setFont(new Font("Times New Roman", Font.PLAIN, 16)); btnA.setBackground(white); btnA.setBounds(23, 125, 50, 45); contentPane.add(btnA); btnS = new JButton("S"); btnS.setVerticalAlignment(SwingConstants.TOP); btnS.setHorizontalAlignment(SwingConstants.LEADING); btnS.setFont(new Font("Times New Roman", Font.PLAIN, 16)); btnS.setBackground(white); btnS.setBounds(82, 125, 50, 45); contentPane.add(btnS); btnG = new JButton("G"); btnG.setVerticalAlignment(SwingConstants.TOP); btnG.setHorizontalAlignment(SwingConstants.LEADING); btnG.setFont(new Font("Times New Roman", Font.PLAIN, 16)); btnG.setBackground(white); btnG.setBounds(251, 125, 50, 45); contentPane.add(btnG); btnH = new JButton("H"); btnH.setVerticalAlignment(SwingConstants.TOP);