软件工程个人作业（2）

源代码：package zuoye2;

import java.awt.Container;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.*;

class jiemian

{

public jiemian()

{

JFrame jf=new JFrame("四则运算");

jf.setBounds(200, 100, 500, 500);

jf.setLayout(null);

Container c=jf.getContentPane();

JCheckBox j1=new JCheckBox("有乘除法");

JCheckBox j2=new JCheckBox("有括号");

JCheckBox j3=new JCheckBox("有负数");

JCheckBox j4=new JCheckBox("有余数");

JLabel l1=new JLabel("请输入数值范围");

JLabel l4=new JLabel("请输入参数个数（1—10）");

JLabel l2=new JLabel("—");

JLabel l3=new JLabel("请输入题目数目(1-30)");

JTextField t1=new JTextField("0");

JTextField t2=new JTextField();

JTextField t3=new JTextField();

JTextField t4=new JTextField();

j1.setBounds(100, 100, 80,20);

j2.setBounds(100, 130, 80,20);

l4.setBounds(100, 160, 180,20);

j3.setBounds(100, 220, 80,20);

j4.setBounds(100, 250, 80,20);

t1.setBounds(100, 190, 50,20);

l1.setBounds(100, 280, 150,20);

t2.setBounds(100, 310, 50,20);

t3.setBounds(180, 310, 50,20);

l2.setBounds(160, 310, 30,20);

l3.setBounds(100, 340, 150,20);

t4.setBounds(100, 370, 50,20);

c.add(j1);

c.add(j2);

c.add(j3);

c.add(l4);

c.add(j4);

c.add(t1);

c.add(l1);

c.add(t2);

c.add(t3);

c.add(l2);

c.add(l3);

c.add(t4);

JButton b1=new JButton("确定");

JButton b2=new JButton("退出");

b1.setBounds(350, 150,70, 50);

b2.setBounds(350, 300,70, 50);

c.add(b1);

c.add(b2);

b1.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent e)

{

jf.dispose();

String a1,a2,a3,a4,a5;

int c1,c2,c3,c4,c5;

boolean f1=false,f2=false,f3=false,f4=false,f5=false;

a1=t1.getText().toString();

a2=t2.getText().toString();

a3=t3.getText().toString();

a4=t4.getText().toString();

if(a2.equals("")||a3.equals(""))

{

JOptionPane.showMessageDialog(null, "范围不能为空", "范围不能为空", JOptionPane.ERROR_MESSAGE);

System.exit(0);

}

else if(a4.equals(""))

{

JOptionPane.showMessageDialog(null, "数目不能为空", "数目不能为空", JOptionPane.ERROR_MESSAGE);

System.exit(0);

}

else if(j2.isSelected())

{

if (a1.equals(""))

{

JOptionPane.showMessageDialog(null, "参数个数不能为空", "参数个数不能为空", JOptionPane.ERROR_MESSAGE);

System.exit(0);

}

else if(Integer.parseInt(a1)>10||Integer.parseInt(a1)<=0)

{

JOptionPane.showMessageDialog(null, "参数个数超出", "参数个数超出", JOptionPane.ERROR_MESSAGE);

System.exit(0);}

}

else if(Integer.parseInt(a4)<=0||Integer.parseInt(a4)>30)

{

JOptionPane.showMessageDialog(null, "题目数目不正确", "题目数目不正确", JOptionPane.ERROR_MESSAGE);

System.exit(0);

}

else if(Integer.parseInt(a3)<=Integer.parseInt(a2))

{

JOptionPane.showMessageDialog(null, "范围不正确", "范围不正确", JOptionPane.ERROR_MESSAGE);

System.exit(0);

}

if(j1.isSelected())

{

f1=true;

}

if(j2.isSelected())

{

f2=true;

}

if(j3.isSelected())

{

f3=true;

}

if(j4.isSelected())

{

f4=true;

}

c1=Integer.parseInt(a1);

c2=Integer.parseInt(a2);

c3=Integer.parseInt(a3);

c4=Integer.parseInt(a4);

yunsuan a=new yunsuan(c1,c2,c3,c4,f1,f2,f3,f4);

}

});

b2.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent e)

{

jf.dispose();

}

});

jf.setVisible(true);

jf.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

}

package zuoye2;

public class m extends jiemian

{

public static void main(String[] args)

{

// TODO Auto-generated method stub

jiemian a=new jiemian();

}

else

{

if(e[i]==1)

{

a[i]=r1[i].nextInt(c3-c2)+c2;

b[i]=r2[i].nextInt(c3-c2)+c2;

d[i]=a[i]+b[i];

a1[i]=String.valueOf(a[i]);

b1[i]=String.valueOf(b[i]);

d1[i]=String.valueOf(d[i]);

j1[i]=new JLabel(a1[i]);

j2[i]=new JLabel("+");

j3[i]=new JLabel(b1[i]);

j4[i]=new JLabel("=");

}

if(e[i]==2)

{

int x;

a[i]=r1[i].nextInt(c3-c2)+c2;

b[i]=r2[i].nextInt(c3-c2)+c2;

if(b[i]>a[i])

{

x=b[i];

b[i]=a[i];

a[i]=x;

}

d[i]=a[i]-b[i];

a1[i]=String.valueOf(a[i]);

b1[i]=String.valueOf(b[i]);

d1[i]=String.valueOf(d[i]);

j1[i]=new JLabel(a1[i]);

j2[i]=new JLabel("-");

j3[i]=new JLabel(b1[i]);

j4[i]=new JLabel("=");

}

if(e[i]==3)

{

a[i]=r1[i].nextInt(c3-c2)+c2;

b[i]=r2[i].nextInt(c3-c2)+c2;

d[i]=a[i]*b[i];

a1[i]=String.valueOf(a[i]);

b1[i]=String.valueOf(b[i]);

d1[i]=String.valueOf(d[i]);

j1[i]=new JLabel(a1[i]);

j2[i]=new JLabel("X");

j3[i]=new JLabel(b1[i]);

j4[i]=new JLabel("=");

}

if(f4==false)

{

if(e[i]==4)

{

d[i]=r1[i].nextInt(c3-c2)+c2;

b[i]=r2[i].nextInt(c3-c2)+c2;

a[i]=b[i]*d[i];

while(d[i]==0||b[i]==0)

{

r1[i]=new Random();

r2[i]=new Random();

d[i]=r1[i].nextInt(20);

b[i]=r2[i].nextInt(20);

a[i]=b[i]*d[i];

}

a1[i]=String.valueOf(a[i]);

b1[i]=String.valueOf(b[i]);

d1[i]=String.valueOf(d[i]);

j1[i]=new JLabel(a1[i]);

j2[i]=new JLabel("/");

j3[i]=new JLabel(b1[i]);

j4[i]=new JLabel("=");

}

else

{

if(e[i]==4)

{

j7[i]=new JLabel("余");

a[i]=r1[i].nextInt(c3-c2)+c2;

b[i]=r2[i].nextInt(c3-c2)+c2;

while(a[i]==0||b[i]==0)

{

r1[i]=new Random();

r2[i]=new Random();

d[i]=r1[i].nextInt(20);

b[i]=r2[i].nextInt(20);

a[i]=b[i]*d[i];

}

a1[i]=String.valueOf(a[i]);

b1[i]=String.valueOf(b[i]);

d1[i]=String.valueOf(d[i]);

j1[i]=new JLabel(a1[i]);

j2[i]=new JLabel("/");

j3[i]=new JLabel(b1[i]);

j4[i]=new JLabel("=");

}

if(e[i]==4&&f4==true)

{

j1[i].setBounds(50+j*42, 50+(k/2)*32, 40, 30);

j++;

j2[i].setBounds(50+j*42, 50+(k/2)*32, 40, 30);

j++;

j3[i].setBounds(50+j*42, 50+(k/2)*32, 40, 30);

j++;

j4[i].setBounds(50+j*42, 50+(k/2)*32, 40, 30);

j++;

j5[i].setBounds(50+j*42, 50+(k/2)*32, 40, 30);

j++;

j7[i].setBounds(65+j*42,50+(k/2)*32, 40, 30);

j++;

j6[i].setBounds(50+j*42,50+(k/2)*32, 40, 30);

j++;

k++;

if(k!=0&&k%2==0)

{

j=0;

}

c.add(j1[i]);

c.add(j2[i]);

c.add(j3[i]);

c.add(j4[i]);

c.add(j5[i]);

c.add(j6[i]);

c.add(j7[i]);

}

else

{

j1[i].setBounds(50+j*42, 50+(k/2)*32, 40, 30);

j++;

j2[i].setBounds(50+j*42, 50+(k/2)*32, 40, 30);

j++;

j3[i].setBounds(50+j*42, 50+(k/2)*32, 40, 30);

j++;

j4[i].setBounds(50+j*42, 50+(k/2)*32, 40, 30);

j++;

j5[i].setBounds(50+j*42, 50+(k/2)*32, 40, 30);

j++;

k++;

if(k!=0&&k%2==0)

{

j=0;

}

c.add(j1[i]);

c.add(j2[i]);

c.add(j3[i]);

c.add(j4[i]);

c.add(j5[i]);

}

jf.setVisible(true);

jf.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

}

设计思路：

1.建立一个frame面板，通过添加复选框来选择是否有乘除法，是否有余数，是否有括号以及是否有负数

2.通过添加文本框来控制计算范围和题目数目。

3.当点击确定按钮，当前窗口关闭，数据提交，并新建一个frame窗口，frame窗口大小根据题目数目而定。

4.通过random产生随机数来控制计算题目以及加减乘除（0-3分别代表加减乘除，若没有选择有乘除，则产生0或1，从而将乘除运算排除掉）

5.根据是否选择有余数来控制除法。若没有余数，则将生成的两个随机数之积作为被除数，第二个随机数作为除数。

6.若选择有负数，加减不做处理，否则比较减数与被减数大小。若减数大于被减数，则将二者交换。

7.通过建立JLabel数组来向窗口输出题目，题目坐标按照题目数累加

8.通过建立文本框来填入答案

9.括号和检验重复没做。