定点小数的运算器，有加减等

import java.awt.*; import java.awt.event.*; import javax.swing.*; public class form2 extends JFrame implements ActionListener { JLabel l1,l2,l3,l4; JTextField t1,t2,t3; JButton b1,b2,b3,b4,b5,b6; JPanel p1,p2,p3; Font font; Box basebox,box1,box2; MainFrame main; String s,s1,s2; boolean bool1=false,bool2=false; form2() { setBounds(100, 100, 680, 300); p1=new JPanel(); p2=new JPanel(); p3=new JPanel(); l1=new JLabel("机器数的真值还原（定点小数(默认8位))"); font = new Font("", Font.BOLD, 29); l1.setFont(font); l2=new JLabel("请输入机器数："); l3=new JLabel("真值还原结果为："); t1=new JTextField(20); t2=new JTextField(20); t1.setEditable(false); t2.setEditable(false); b1=new JButton("输入"); b2=new JButton("原-->真值"); b3=new JButton("反-->真值"); b4=new JButton("补-->真值"); b5=new JButton("移-->真值"); b6=new JButton("返回"); p1.add(l1,BorderLayout.CENTER); box1=Box.createVerticalBox(); box1.add(l2); box1.add(Box.createVerticalStrut(10)); box1.add(l3); box1.add(Box.createVerticalStrut(10)); box2=Box.createVerticalBox(); box2.add(t1); box2.add(Box.createVerticalStrut(10)); box2.add(t2); box2.add(Box.createVerticalStrut(10)); basebox=Box.createHorizontalBox(); basebox.add(box1); basebox.add(Box.createHorizontalStrut(12)); basebox.add(box2); p2.add(basebox); p3.add(b1); p3.add(b2); p3.add(b3); p3.add(b4); p3.add(b5); p3.add(b6); b2.setEnabled(false); b3.setEnabled(false); b4.setEnabled(false); b5.setEnabled(false); add(p1,BorderLayout.NORTH); add(p2,BorderLayout.CENTER); add(p3,BorderLayout.SOUTH); b1.addActionListener(this); b2.addActionListener(this); b3.addActionListener(this); b4.addActionListener(this); b5.addActionListener(this); b6.addActionListener(this); addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { setVisible(false); } }); setVisible(true); validate(); } public void actionPerformed(ActionEvent e) { if(e.getSource() == b1){ b2.setEnabled(true); b3.setEnabled(true); b4.setEnabled(true); b5.setEnabled(true); t1.setEditable(true); t2.setEditable(true); } else if (e.getSource() == b2) { yuan (); t2.setText(s2); /*if(bool1==true) { System.out.print("1"); } else { JOptionPane.showMessageDialog(this, "输入有误！请重新输入！！","警告对话框",JOptionPane.WARNING_MESSAGE); t1.setText(null); t2.setText(null); t3.setText(null); }*/ } else if (e.getSource() == b3) { fan(); t2.setText(s2); } else if (e.getSource() == b4) { bu(); t2.setText(s2); } else if (e.getSource() == b5) { yi(); t2.setText(s2); } else if (e.getSource() == b6) { setVisible(false); } } /*public void jc() { char a[]= s.toCharArray(); char b[]=s1.toCharArray(); int i=0,j=0; for(i=0;i<=s.length()-1;i++) { if(a[i]=='0'||a[i]=='1') { while(i==s.length()-1) { bool1=true; } } else { /*JOptionPane.showMessageDialog(this, "输入有误！请重新输入！！","警告对话框",JOptionPane.WARNING_MESSAGE); t1.setText(null); t2.setText(null); t3.setText(null); break; } } for(j=0;j<=s1.length()-1;j++) { if(b[j]=='0'||b[j]=='1') { while(j==s1.length()-1) { bool2=true; } } else {} } } */ public String yuan() { s2=""; s=t1.getText(); if(s.length()<=9) { if(s.charAt(0)=='0') { s1=s.substring(0,9); s2="+"+s1; } else if(s.charAt(0)=='1') { s1=s.substring(1,9); s2="-0"+s1; } } else s2="超出字长范围"; return s2; } public String fan() { s=t1.getText(); if(s.length()<=9) { if(s.charAt(0)=='0') { s1=s.substring(0,9); s2="+"+s1; } else if(s.charAt(0)=='1') { s2=""; s1=s.substring(2,9); for(int i=0;i<7;i++) {if(s1.charAt(i)=='0') { s2=s2+"1"; } else if(s1.charAt(i)=='1') { s2=s2+"0"; } } s2="-0."+s2; } }else s2="超出字长范围"; return s2; } public String bu() { s=t1.getText(); if(s.length()<=9) { if(s.charAt(0)=='0') { s1=s.substring(0,9); s2="+"+s1; } else if(s.charAt(0)=='1') { Double x=Double.parseDouble(s); x=x-0.0000001; s=String.valueOf(x); s2=""; s1=s.substring(2,9); for(int i=0;i<7;i++) {if(s1.charAt(i)=='0') { s2=s2+"1"; } else if(s1.charAt(i)=='1') { s2=s2+"0"; } } s2="-0."+s2; while(s2.length()<10) { s2=s2+"0"; } }}else s2="超出字长范围"; return s2; } public String yi() { s=t1.getText(); if(s.length()<=9) { if(s.charAt(0)=='1') { s1=s.substring(1,9); s2="+0"+s1; } else if(s.charAt(0)=='0') { Double x=Double.parseDouble(s); x=x+1; x=x-0.0000001; s=String.valueOf(x); s2=""; s1=s.substring(2,9); for(int i=0;i<7;i++) {if(s1.charAt(i)=='0') { s2=s2+"1"; } else if(s1.charAt(i)=='1') { s2=s2+"0"; } } s2="-0."+s2; while(s2.length()<10) { s2=s2+"0"; } }}else s2="超出字长范围"; return s2; } }