java2实用教程第四版实验 清华大学出版社9-1 9-2(北华大学吕磊).docVIP

9-1算数测试 import java.awt.*; import java.awt.event.*; import javax.swing.*; import java.util.Random; import java.awt.event.*; import javax.swing.*; public class MainClass{ public static void main(String args[]){ ComputerFrame frame; frame=new ComputerFrame(); frame.setTitle(算数测试); frame.setBounds(100,100,650,180); } } class ComputerFrame extends JFrame{ JMenuBar menubar; JMenu choiceGrade; JMenuItem grade1,grade2; JTextField textOne,textTwo,textResult; JButton getProblem,giveAnwser; JLabel operatorLabel,message; Teacher teacherZhang; ComputerFrame(){ teacherZhang=new Teacher(); teacherZhang.setMaxInteger(20); setLayout(new FlowLayout()); menubar=new JMenuBar(); choiceGrade=new JMenu(选择级别); grade1=new JMenuItem(幼儿级别); grade2=new JMenuItem(儿童级别); grade1.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e){ teacherZhang.setMaxInteger(10); } }); grade2.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e){ teacherZhang.setMaxInteger(50); } }); choiceGrade.add(grade1); choiceGrade.add(grade2); menubar.add(choiceGrade); setJMenuBar(menubar); textOne=new JTextField(5); textTwo=new JTextField(5); textResult=new JTextField(5); operatorLabel=new JLabel(+); operatorLabel.setFont(new Font(Arial,Font.BOLD,20)); message=new JLabel(你还没有回答呢); getProblem=new JButton(获取题目); giveAnwser=new JButton(确认答案); add(getProblem); add(textOne); add(operatorLabel); add(textTwo); add(new JLabel(=)); add(textResult); add(giveAnwser); add(message); textResult.requestFocus(); textOne.setEditable(false); textTwo.setEditable(false); getProblem.setActionCommand(getProblem); textResult.setActionCommand(answer); giveAnwser.setActionCommand(answer); teacherZhang.setJTextField(textOne,textTwo,textResult); teacherZhang.setJLabel(operatorLabe