有界面的四则运算

import java.awt.BorderLayout;

import java.awt.Container;

import java.awt.FlowLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;



import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JPasswordField;

import javax.swing.JTextField;

public class Login {    

    private JFrame frame = new JFrame("四则运算");    

    private Container c = frame.getContentPane();    

    private JTextField username = new JTextField();    

    private JPasswordField password = new JPasswordField();    

    private JButton ok = new JButton("确定");

    private JButton cancel = new JButton("取消");    

    public Login(){        frame.setSize(300,200);        

    c.setLayout(new BorderLayout());    

    initFrame();    

    frame.setVisible(true);

    }    

    private void initFrame() 

    {                //顶部

        ok.addActionListener(new ActionListener(){

            public void actionPerformed(ActionEvent arg0) {

                new suanfa();

                }

        });

        JPanel titlePanel = new JPanel();    

        titlePanel.setLayout(new FlowLayout());    

        titlePanel.add(new JLabel("学生登录"));    

        c.add(titlePanel,"North");            

        //中部表单        

        JPanel fieldPanel = new JPanel();        

        fieldPanel.setLayout(null);        

        JLabel l1 = new JLabel("学   号:");        

        l1.setBounds(50, 20, 50, 20);    

        JLabel l2 = new JLabel("密    码:");        

        l2.setBounds(50, 60, 50, 20);    

        fieldPanel.add(l1);        

        fieldPanel.add(l2);        

        username.setBounds(110,20,120,20);    

        password.setBounds(110,60,120,20);    

        fieldPanel.add(username);    

        fieldPanel.add(password);    

        c.add(fieldPanel,"Center");                //底部按钮        

        JPanel buttonPanel = new JPanel();    

        buttonPanel.setLayout(new FlowLayout());    

        buttonPanel.add(ok);    

        buttonPanel.add(cancel);        

        c.add(buttonPanel,"South");    }    

    public static void main(String[] args){        new Login();    }    

    }









import java.awt.BorderLayout;

import java.awt.Container;

import java.awt.FlowLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;



import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JPasswordField;

import javax.swing.JTextField;





public class yunsuan extends JFrame{

    JLabel l1 = new JLabel("答对题数:");



    private JFrame frame = new JFrame("四则运算");    

    private Container c = frame.getContentPane();    

    private JButton KO = new JButton("确定");

    private JTextField A = new JTextField(6);

    private JTextField AA = new JTextField(4);

    private JTextField AAA = new JTextField(4);

    private JTextField B = new JTextField(6);

    private JTextField BB = new JTextField(4);

    private JTextField BBB = new JTextField(4);

    private JTextField C = new JTextField(6);

    private JTextField CC = new JTextField(4);

    private JTextField CCC = new JTextField(4);

    private JTextField D = new JTextField(6);

    private JTextField DD = new JTextField(4);

    private JTextField DDD = new JTextField(4);

    private JTextField E = new JTextField(6);

    private JTextField EE = new JTextField(4);

    private JTextField EEE = new JTextField(4);

    private JPasswordField password = new JPasswordField();    

    private JButton ok = new JButton("确定");

    private JTextField QQ = new JTextField(6);

    

    

int num=0;

    int an[]=new int [5];

    String bn[]=new String [5];

    String cn[]=new String [5];

     yunsuan(int a[],String b[]) 

    {    

         an=a;

         bn=b;

     

        JPanel fieldPanel = new JPanel();

    

        fieldPanel.add(A);A.setBounds(30, 10, 100, 20);

        A.setVisible(true);

        fieldPanel.add(AA);AA.setBounds(40, 10, 100, 20);

        fieldPanel.add(AAA);AAA.setBounds(50, 10, 100, 20);

        fieldPanel.add(B);B.setBounds(30, 15, 50, 20);

        fieldPanel.add(BB);BB.setBounds(40, 15, 100, 20);

        fieldPanel.add(BBB);BBB.setBounds(50, 10, 100, 20);

        fieldPanel.add(C);C.setBounds(30, 20, 50, 20);

        fieldPanel.add(CC);CC.setBounds(40, 20, 100, 20);

        fieldPanel.add(CCC);CCC.setBounds(50, 10, 100, 20);

        fieldPanel.add(D);D.setBounds(30, 25, 50, 20);

        fieldPanel.add(DD);DD.setBounds(40, 25, 100, 20);

        fieldPanel.add(DDD);DDD.setBounds(50, 10, 100, 20);

        fieldPanel.add(E);E.setBounds(30, 30, 50, 20);

        fieldPanel.add(EE);EE.setBounds(40, 30, 100, 20);

        fieldPanel.add(EEE);EEE.setBounds(50, 10, 100, 20);

        fieldPanel.add(KO);KO.setBounds(30, 50, 20, 20);

        fieldPanel.add(l1);l1.setBounds(20, 60, 100, 20);

        fieldPanel.add(QQ);QQ.setBounds(40, 70, 100, 20);

    

        KO.addActionListener(new ActionListener(){

            public void actionPerformed(ActionEvent arg0) {

                cn[0]=AA.getText();

                cn[1]=BB.getText();

                cn[2]=CC.getText();

                cn[3]=DD.getText();

                cn[4]=EE.getText();

                AAA.setText(String.valueOf(an[0]));

            BBB.setText(String.valueOf(an[1]));        

            CCC.setText(String.valueOf(an[2]));                

            DDD.setText(String.valueOf(an[3]));

            EEE.setText(String.valueOf(an[4]));

                for(int i=0;i<an.length;i++)

                if(String.valueOf(an[i]).equals(cn[i]))num++;

                QQ.setText(String.valueOf(num));

                }

        });

        fieldPanel.setVerifyInputWhenFocusTarget(true);

        

        

        A.setText(bn[0]);

        B.setText(bn[1]);

        C.setText(bn[2]);

        D.setText(bn[3]);

        E.setText(bn[4]);

        

        

        

        

this.add(fieldPanel);

this.setBounds(400, 400, 250, 270);

this.setVisible(true);











    }

     }



    

import java.util.Random;





public class suanfa {

    int a,b,c,d;

    int an[]=new int [5];

    String bn[]=new String [5];

    Random cn =new Random();

    suanfa(){

        int i=0;

        do{    

        a=cn.nextInt(100);

        b=cn.nextInt(100);

        d=cn.nextInt(100)%4+1;

        switch(d){

            case 1:

                an[i]=a+b;

                bn[i]=String.valueOf(a)+"+"+String.valueOf(b)+"=";

                i++;

                break;

            case 2: 

                an[i]=a-b;

                bn[i]=String.valueOf(a)+"-"+String.valueOf(b)+"=";

                i++;break;

            case 3:an[i]=a*b;

            bn[i]=String.valueOf(a)+"*"+String.valueOf(b)+"=";

            i++;

                break;

            case 4:an[i]=a/b;

            bn[i]=String.valueOf(a)+"/"+String.valueOf(b)+"=";

            i++;break;

        }

        }while(i<5);

        for(int j=0;j<bn.length;j++)

            {System.out.println(bn[j]);System.out.println(an[j]);

            }

        new yunsuan(an,bn);

    }

    

}