软件工程作业02
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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++; j++; 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++; j++; j++; j++; 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。
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