作业五 四则元算 测试与封装

未封装的程序：

import java.awt.*;
import java.awt.event.*;

import javax.swing.*;
public class Size {

    public static void main(String[] args) {
        // TODO Auto-generated method stub

        myframe f=new myframe();
    }

}
class myframe extends JFrame
{
    JLabel L1=new JLabel("题目:");
    JLabel L2=new JLabel("输入题目个数:");
    JLabel L3=new JLabel("提示:");
    JLabel L4=new JLabel("        ");   //题目
    JLabel L5=new JLabel("题目个数不能大于5");   //提示
    JTextField T1=new JTextField(6);
    JButton B1=new JButton("开始");
    JButton B2=new JButton("确认");
    JButton B3=new JButton("下一题");
    JButton B4=new JButton("换皮肤");
    JPanel p1=new JPanel();
    int n=0,a,b,c,d,j,k,l,m=0,p;
    double result;
    char[]h={'+','-','*','/'},h1={'(',')','!'};
    String s1,s2;
    Color col[]={Color.blue,Color.green,Color.ORANGE,Color.PINK,Color.GRAY,Color.RED,Color.LIGHT_GRAY};
    myframe(){
        this.setTitle("四则运算");
        this.setSize(300,280);
        this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        this.add(p1); 
        p1.setLayout(null);
        L1.setBounds(50, 20, 90, 30);
        p1.add(L1);
        L4.setBounds(140, 20, 150, 30);
        p1.add(L4);
        L2.setBounds(50, 70, 90, 30);
        p1.add(L2);
        T1.setBounds(150, 70, 90, 30);
        p1.add(T1);
        B4.setBounds(100, 110, 90, 30);
        p1.add(B4);
        B1.setBounds(10, 150, 90, 30);
        p1.add(B1);
        B2.setBounds(100, 150, 90, 30);
        p1.add(B2);
        B2.setEnabled(false);
        B3.setBounds(190, 150,90,30);
        p1.add(B3);
        L3.setBounds(50, 200, 50, 30);
        B3.setEnabled(false);
        p1.add(L3);
        L5.setBounds(100, 200, 180, 30);
        p1.add(L5);
        this.setVisible(true);
        this.setLocationRelativeTo(null);
        B1.addActionListener(new B());
        B2.addActionListener(new B());
        B3.addActionListener(new B());
        B4.addActionListener(new B());
    }
    class B implements ActionListener {

        @Override
        public void actionPerformed(ActionEvent e) {
            // TODO Auto-generated method stub
            if(e.getSource()==B1)
            {
                p=n=(int) Double.parseDouble(T1.getText());
                //System.out.print(n);
                if(n>5||n<1)
                {
                    JOptionPane.showMessageDialog(null,"输入的个数不能大于5或者小于1","注意",JOptionPane.INFORMATION_MESSAGE);
                }
                else
                {
                    B1.setEnabled(false);
                    B2.setEnabled(true);
                    B3.setEnabled(true);
                    L2.setText("输入答案 :");
                    L5.setText(null);
                    T1.setText(null);
                    star();
                }
            }
            if(e.getSource()==B2)
            {
                l=(int) Double.parseDouble(T1.getText());
                if(l==result)
                {
                    m++;
                    s2="答案正确！";
                    L5.setText(s2);
                }
                else{
                    s2="答案错误!答案为:"+String.valueOf(result);
                    L5.setText(s2);
                }
                B2.setEnabled(false);
            }
            if(e.getSource()==B3)
            {
                if(n==0)
                {
                    JOptionPane.showMessageDialog(null, "一共"+p+"道题目。正确的题数为:"+m,"成绩",JOptionPane.INFORMATION_MESSAGE);
                    B1.setEnabled(true);
                    B2.setEnabled(false);
                    B3.setEnabled(false);
                    L2.setText("输入题目个数:");
                    L4.setText(null);
                    T1.setText(null);
                }
                else
                {
                    L5.setText(null);
                    T1.setText(null);
                    star();
                    B2.setEnabled(true);
                }
            }
            if(e.getSource()==B4)
            {
                int i;
                i=(int)(Math.random()*6);
                p1.setBackground(col[i]);
            }
        }
    }
    void star()
    {
        a=(int) (Math.random()*10);
        b=(int) (Math.random()*10);
        c=(int) (Math.random()*10);
        d=(int) (Math.random()*10);
        j=(int) (Math.random()*4);
        k=(int) (Math.random()*4);
        if(d<0)
        {
            a=(int) (Math.random()*9+1);
            s1=String.valueOf(a)+String.valueOf(h1[2]);
            L4.setText(s1);
            result=1;
            for(int i=1;i<=a;i++)
            {
                result=result*i;
            }
        }
        else
        {
            if(b>=0&&c>=0)
            {
                s1=String.valueOf(a)+String.valueOf(h[j])+String.valueOf(b)+String.valueOf(h[k])+String.valueOf(c);
                L4.setText(s1);
                System.out.println(s1);    
            }
            else if(b<0&&c>=0)
            {
                s1=String.valueOf(a)+String.valueOf(h[j])+String.valueOf(h1[0])+String.valueOf(b)+String.valueOf(h1[1])+String.valueOf(h[k])+String.valueOf(c);
                L4.setText(s1);
                System.out.println(s1);    
            }
            else if(b>=0&&c<0)
            {
                s1=String.valueOf(a)+String.valueOf(h[j])+String.valueOf(b)+String.valueOf(h[k])+String.valueOf(h1[0])+String.valueOf(c)+String.valueOf(h1[1]);
                L4.setText(s1);
                System.out.println(s1);    
            }
            else
            {
                s1=String.valueOf(a)+String.valueOf(h[j])+String.valueOf(h1[0])+String.valueOf(b)+String.valueOf(h1[1])+String.valueOf(h[k])+String.valueOf(h1[0])+String.valueOf(c)+String.valueOf(h1[1]);
                L4.setText(s1);
                System.out.println(s1);
            }
            if(k>1)  //后面的计算符为乘除，先算后面两个数
            {
                if(k==2)
                {
                    result=b*c;    
                }
                else if(k==3)
                {
                    result=b/c;
                }
                if(j==0)
                {
                    result=result+a;
                }
                else if(j==1)
                {
                    result=a-result;
                }
                else if(j==2)
                {
                    result=a*result;
                }
                else if(j==3)
                {
                    result=a/result;
                }
            }
            else if(k<2)
            {
                if(j==0)
                {
                    result=b+a;
                }
                else if(j==1)
                {
                    result=a-b;
                }
                else if(j==2)
                {
                    result=a*b;
                }
                else if(j==3)
                {
                    result=a/b;
                }
                if(k==0)
                    result=result+c;
                if(k==1)
                    result=result-c;
            }
        }
        System.out.println(result);    
        n--;
    }
}

封装后的程序：
import java.awt.*;
import java.awt.event.*;

import javax.swing.*;
public class Size {

    public static void main(String[] args) {
        // TODO Auto-generated method stub

        myframe f=new myframe();
    }

}
class myframe extends JFrame
{
    JLabel L1=new JLabel("题目:");
    JLabel L2=new JLabel("输入题目个数:");
    JLabel L3=new JLabel("提示:");
    JLabel L4=new JLabel("        ");   //题目
    JLabel L5=new JLabel("题目个数不能大于5");   //提示
    JTextField T1=new JTextField(6);
    JButton B1=new JButton("开始");
    JButton B2=new JButton("确认");
    JButton B3=new JButton("下一题");
    JButton B4=new JButton("换皮肤");
    JPanel p1=new JPanel();
    int n=0,a,b,c,d,j,k,l,m=0,p;
    double result;
    char[]h={'+','-','*','/'},h1={'(',')','!'};
    String s1,s2;
    Color col[]={Color.blue,Color.green,Color.ORANGE,Color.PINK,Color.GRAY,Color.RED,Color.LIGHT_GRAY};
    myframe(){
        this.setTitle("四则运算");
        this.setSize(300,280);
        this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        this.add(p1); 
        p1.setLayout(null);
        L1.setBounds(50, 20, 90, 30);
        p1.add(L1);
        L4.setBounds(140, 20, 150, 30);
        p1.add(L4);
        L2.setBounds(50, 70, 90, 30);
        p1.add(L2);
        T1.setBounds(150, 70, 90, 30);
        p1.add(T1);
        B4.setBounds(100, 110, 90, 30);
        p1.add(B4);
        B1.setBounds(10, 150, 90, 30);
        p1.add(B1);
        B2.setBounds(100, 150, 90, 30);
        p1.add(B2);
        B2.setEnabled(false);
        B3.setBounds(190, 150,90,30);
        p1.add(B3);
        L3.setBounds(50, 200, 50, 30);
        B3.setEnabled(false);
        p1.add(L3);
        L5.setBounds(100, 200, 180, 30);
        p1.add(L5);
        this.setVisible(true);
        this.setLocationRelativeTo(null);
        B1.addActionListener(new B());
        B2.addActionListener(new B());
        B3.addActionListener(new B());
        B4.addActionListener(new B());
    }
    class B implements ActionListener {

        @Override
        public void actionPerformed(ActionEvent e) {
            // TODO Auto-generated method stub
            if(e.getSource()==B1)
            {
               p=n=(int) Double.parseDouble(T1.getText());
                //System.out.print(n);
                if(n>5||n<1)
                {
                    JOptionPane.showMessageDialog(null,"输入的个数不能大于5或者小于1","注意",JOptionPane.INFORMATION_MESSAGE);
                }
                else
                {
                    B1.setEnabled(false);
                    B2.setEnabled(true);
                    B3.setEnabled(true);
                    L2.setText("输入答案 :");
                    L5.setText(null);
                    T1.setText(null);
                    Star.star(h1, h,a,b,c,d,n,j,k,s1,L4,result);
                }
            }
            if(e.getSource()==B2)
            {
                l=(int) Double.parseDouble(T1.getText());
                if(l==result)
                {
                    m++;
                    s2="答案正确！";
                    L5.setText(s2);
                }
                else{
                    s2="答案错误!答案为:"+String.valueOf(result);
                    L5.setText(s2);
                }
                B2.setEnabled(false);
            }
            if(e.getSource()==B3)
            {
                if(n==0)
                {
                    JOptionPane.showMessageDialog(null, "一共"+p+"道题目。正确的题数为:"+m,"成绩",JOptionPane.INFORMATION_MESSAGE);
                    B1.setEnabled(true);
                    B2.setEnabled(false);
                    B3.setEnabled(false);
                    L2.setText("输入题目个数:");
                    L4.setText(null);
                    T1.setText(null);
                }
                else
                {
                    L5.setText(null);
                    T1.setText(null);
                    Star.star(h1, h,a,b,c,d,n,j,k,s1,L4,result);
                    B2.setEnabled(true);
                }
            }
            if(e.getSource()==B4)
            {
                int i;
                i=(int)(Math.random()*6);
                p1.setBackground(col[i]);
            }
        }
    }
   
}
import javax.swing.JLabel;


public class Star {
    public static void star(char[]h1,char[]h,int a,int b,int c,int d,int n,int j,int k,String s1,JLabel L4,double result){
            a=(int) (Math.random()*200-100);
            b=(int) (Math.random()*200-100);
            c=(int) (Math.random()*200-100);
            d=(int) (Math.random()*200-100);
            j=(int) (Math.random()*4);
            k=(int) (Math.random()*4);
            if(d<0)
            {
                a=(int) (Math.random()*9+1);
                s1=String.valueOf(a)+String.valueOf(h1[2]);
                L4.setText(s1);
                result=1;
                for(int i=1;i<=a;i++)
                {
                    result=result*i;
                }
            }
            else
            {
                if(b>=0&&c>=0)
                {
                    s1=String.valueOf(a)+String.valueOf(h[j])+String.valueOf(b)+String.valueOf(h[k])+String.valueOf(c);
                    L4.setText(s1);
                    System.out.println(s1);    
                }
                else if(b<0&&c>=0)
                {
                    s1=String.valueOf(a)+String.valueOf(h[j])+String.valueOf(h1[0])+String.valueOf(b)+String.valueOf(h1[1])+String.valueOf(h[k])+String.valueOf(c);
                    L4.setText(s1);
                    System.out.println(s1);    
                }
                else if(b>=0&&c<0)
                {
                    s1=String.valueOf(a)+String.valueOf(h[j])+String.valueOf(b)+String.valueOf(h[k])+String.valueOf(h1[0])+String.valueOf(c)+String.valueOf(h1[1]);
                    L4.setText(s1);
                    System.out.println(s1);    
                }
                else
                {
                    s1=String.valueOf(a)+String.valueOf(h[j])+String.valueOf(h1[0])+String.valueOf(b)+String.valueOf(h1[1])+String.valueOf(h[k])+String.valueOf(h1[0])+String.valueOf(c)+String.valueOf(h1[1]);
                    L4.setText(s1);
                    System.out.println(s1);
                }
                if(k>1)  //后面的计算符为乘除，先算后面两个数
                {
                    if(k==2)
                    {
                        result=b*c;    
                    }
                    else if(k==3)
                    {
                        result=b/c;
                    }
                    if(j==0)
                    {
                        result=result+a;
                    }
                    else if(j==1)
                    {
                        result=a-result;
                    }
                    else if(j==2)
                    {
                        result=a*result;
                    }
                    else if(j==3)
                    {
                        result=a/result;
                    }
                }
                else if(k<2)
                {
                    if(j==0)
                    {
                        result=b+a;
                    }
                    else if(j==1)
                    {
                        result=a-b;
                    }
                    else if(j==2)
                    {
                        result=a*b;
                    }
                    else if(j==3)
                    {
                        result=a/b;
                    }
                    if(k==0)
                        result=result+c;
                    if(k==1)
                        result=result-c;
                }
            }
            System.out.println(result);    
            n--;
        }
}
    具体结果和总结在我的队友14曾柏书（http://www.cnblogs.com/cypress-zeng/）的博客里，那边会有详细地解释啦。
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原文地址：https://www.cnblogs.com/zhangqicong/p/4468684.html