import java.awt.*;
import java.awt.event.*;
import javax.swing.*;public class ArithmeticTest7 extends JFrame implements ActionListener {private final String[] str1 = { "一年级","二年级","三年级","四年级","五年级","六年级"};private final String[] str2 = { "开始","换一个","重开"};JButton giveAnswer = new JButton("提交");//button for resetJButton up[] = new JButton[str2.length];JTextField display = new JTextField("");JTextField answer = new JTextField("");JTextField display2 = new JTextField("余数:(可不填)");JTextField answer2 = new JTextField("");JTextField user1 = new JTextField("姓名：");JTextField user2 = new JTextField("");private String name= user2.getText();JTextArea file = new JTextArea("");JScrollPane File=new JScrollPane(file);JTextField numberOfDigit1 = new JTextField("年级：");JTextField numberOfDigit2 = new JTextField("");JComboBox calculate=new JComboBox();public Font ziti = new Font("宋体", Font.BOLD, 25);public ArithmeticTest7() {super("Caltest");Font font = new Font("宋体", Font.BOLD, 30);JPanel pnlHead = new JPanel(new BorderLayout());JPanel pnlHeadUp = new JPanel(new GridLayout(1,5));JPanel pnlBodyEast = new JPanel(new GridLayout(2,1));JPanel displayArea=new JPanel(new GridLayout(1,5));displayArea.add(display);display.setFont(font);displayArea.add(answer);answer.setFont(font);displayArea.add(display2);display2.setFont(font);displayArea.add(answer2);answer2.setFont(font);pnlHeadUp.add(user1);user1.setFont(font);pnlHeadUp.add(user2);user2.setFont(font);name= user2.getText();pnlHeadUp.add(numberOfDigit1);numberOfDigit1.setFont(font);pnlBodyEast.add(giveAnswer);pnlHeadUp.add(calculate);pnlHead.add( displayArea, BorderLayout.CENTER);pnlHead.add( pnlHeadUp, BorderLayout.NORTH);for (int i = 0; i < str1.length; i++){calculate.setFont(font);calculate.addItem(str1[i]);}for (int i = 0; i < str2.length; i++){up[i] = new JButton(str2[i]);up[i].setFont(font);pnlBodyEast.add(up[i]);}display.setFont(font);giveAnswer.setFont(font);user1.setEnabled(false);display.setEnabled(false);display2.setEnabled(false);numberOfDigit1.setEnabled(false);JPanel pnlBody = new JPanel(new BorderLayout());pnlBody.add(File,BorderLayout.CENTER);pnlBody.add(pnlBodyEast,BorderLayout.NORTH);setLayout(new BorderLayout());add(BorderLayout.NORTH, pnlHead);add(BorderLayout.CENTER, pnlBody);giveAnswer.addActionListener(this);display.addActionListener(this);calculate.addActionListener(this);for (int i = 0; i < str2.length; i++){up[i].addActionListener(this);}setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);setSize(800, 500);Dimension displaySize = Toolkit.getDefaultToolkit().getScreenSize(); // 获得显示器大小对象Dimension frameSize = getSize();setLocation((displaySize.width - frameSize.width)/2 , (displaySize.height - frameSize.height)/2 );setVisible(true);}int o=0;int score=0;int[] Answer=new int[100];int[] Answer2=new int[100];int[] b=new int[100];int[] n=new int[100];int[] m=new int[100];String[] c=new String[10];String N,M;public void actionPerformed(ActionEvent e) {Object source = e.getSource();name= user2.getText();if (source==up[0])CalculateE();if (source==up[1]){CalculateE();score=0;o=0;}if (source==up[2]){CalculateE();file.setText("");score=0;o=0;}if (source == giveAnswer){String q=answer.getText();int a=Integer.parseInt(q);if(a==Answer[o])score=score+10;String str = null;switch (b[o]) {case 1:str=String.format("%-10s%-10s%-10s%-10s\r\n",n[o]+"+"+m[o]+"=",name+"答案"+a,"标准答案:"+Answer[o],"目前得分:"+score);break;case 2:if(n[o]<m[o])str=String.format("%-10s%-10s%-10s%-10s\r\n",m[o]+"-"+n[o]+"=",name+"答案"+a,"标准答案:"+Answer[o],"目前得分:"+score);if(n[o]>=m[o])str=String.format("%-10s%-10s%-10s%-10s\r\n",n[o]+"-"+m[o]+"=",name+"答案"+a,"标准答案:"+Answer[o],"目前得分:"+score);break;case 3:str=String.format("%-10s%-10s%-10s%-10s\r\n",n[o]+"*"+m[o]+"=",name+"答案"+a,"标准答案:"+Answer[o],"目前得分:"+score);break;case 4:if(n[o]<m[o]){str=String.format("%-10s%-10s%-10s%-10s\r\n",m[o]+"/"+n[o]+"=",name+"答案"+a,"标准答案:"+Answer[o],"目前得分:"+score);}if(n[o]>=m[o]){str=String.format("%-10s%-10s%-10s%-10s\r\n",n[o]+"/"+m[o]+"=",name+"答案"+a,"标准答案:"+Answer[o],"目前得分:"+score);}break;}file.setFont(ziti);file.setText(file.getText()+str);if(o<10){o=o+1;if(o!=10){display.setText(c[o]);answer.setText("");answer2.setText("");}}}}public void CalculateE(){if(calculate.getSelectedItem()=="一年级"){for(int i=0;i<10;i++){b[i]=(int)(Math.random()*2)+1;n[i]=(int)(Math.random()*(Math.pow(10, 1)))+1;m[i]=(int)(Math.random()*(Math.pow(10, 1)))+1;}}if(calculate.getSelectedItem()=="二年级"){for(int i=0;i<10;i++) {b[i] = (int) (Math.random() * 2) + 1;n[i] = (int) (Math.random() * (Math.pow(10, 2))) + 1;m[i] = (int) (Math.random() * (Math.pow(10, 2))) + 1;}}if(calculate.getSelectedItem()=="三年级"){for(int i=0;i<10;i++) {b[i] = (int) (Math.random() * 2) + 2;n[i] = (int) (Math.random() * (Math.pow(10, 2))) + 1;m[i] = (int) (Math.random() * (Math.pow(10, 2))) + 1;}}if(calculate.getSelectedItem()=="四年级"){for(int i=0;i<10;i++) {b[i] = (int) (Math.random() * 4) + 1;n[i] = (int) (Math.random() * (Math.pow(10, 2))) + 1;m[i] = (int) (Math.random() * (Math.pow(10, 2))) + 1;}}if(calculate.getSelectedItem()=="五年级"){for(int i=0;i<10;i++){b[i]=(int)(Math.random()*4)+1;n[i]=(int)(Math.random()*(Math.pow(10, 3)))+1;m[i]=(int)(Math.random()*(Math.pow(10, 3)))+1;}}if(calculate.getSelectedItem()=="六年级"){for(int i=0;i<10;i++) {b[i] = (int) (Math.random() * 4) + 1;n[i] = (int) (Math.random() * (Math.pow(10, 3))) + 1;m[i] = (int) (Math.random() * (Math.pow(10, 3))) + 1;}}for(int i=0;i<10;i++){N=String.valueOf(n[i]);M=String.valueOf(m[i]);switch (b[i]) {case 1:c[i]=N+"+"+M+"=";Answer[i]=n[i]+m[i];break;case 2:if(n[i]<m[i])c[i]=M+"-"+N+"=";if(n[i]>=m[i])c[i]=N+"-"+M+"=";Answer[i]=Math.abs(m[i]-n[i]);break;case 3:Answer[i]=n[i]*m[i];c[i]=N+"*"+M+"=";break;case 4:if(n[i]<m[i]){c[i]=M+"/"+N+"=";Answer[i]=m[i]/n[i];Answer2[i]=m[i]%n[i];}if(n[i]>=m[i]){c[i]=N+"/"+M+"=";Answer[i]=n[i]/m[i];Answer2[i]=n[i]%m[i];}break;}}display.setText(c[0]);}public static void main(String[] args) {ArithmeticTest7 test = new ArithmeticTest7();}}