编译原理词法分析.docVIP

package 词法分析;import java.awt.FileDialog;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.File;import java.io.FileReader;import java.io.FileWriter;import java.util.Stack;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JTextArea;import javax.swing.JTextField;import 词法分析.key;import 词法分析.operator;import 词法分析.symbol;public class function extends JFramestatic final long serialVersionUID =1L;int start,end,i=0,j=0,line=0,flag=0,flag1=0;Stack e=new Stack();/（）括号的栈Stack e1=new Stack();/的栈Stack e2=new Stack();/的栈char c,c8;Lexical_Frame f1 =new Lexical_Frame(5);JTextArea f11=new JTextArea();key k=new key();operator op=new operator();symbol sy=new symbol();String str=,currut=,token=;FileDialog open,save;JTextField string_Rearch,string_Replace;JButton btn_Search,btn_Search_Next,btn_Replace,btn_Replace_All; function() ; public String op(JTextArea file1,Lexical_Frame t,JTextArea file3)open=new FileDialog(t,打开,FileDialog.LOAD);open.setVisible(true);tryFile f12=new File(open.getDirectory(),open.getFile();t.frame.setTitle(+open.getDirectory()+open.getFile();FileReader fr=new FileReader(f12);BufferedReader br=new BufferedReader(fr);while(str=br.readLine()!=null)line+;j=str.length();file1.append(line+ +str+n);for(i=0;ij;i+) c=str.charAt(i);flag=0;currut=;token=;if(c=32) continue;if(str.charAt(i)=/&(str.charAt(i+1)=*|str.charAt(i+1)=/)if(str.charAt(i)=/&str.charAt(i+1)=*)flag1=1;else break;if(flag1=1)for(i=0;ij;i+)if(str.charAt(i)=*&str.charAt(i+1)=/)flag1=0;i=i+2;if(ij)if(is_identifiers_key(file3)continue;if(is_digital(file3)continue;if(is_oper(file3)continue; if(is_sym_String(file3)continue; if(c255) f11.append(存在非法字符:+c+在第+line+行+n);if(flag1=1) System.out.println(未找到注释结尾符号);if(!e.empty()f11.append(少了 )括号+n);if(!e1.empty()f11.append(少了 括号+n);if(!e2.empty()f11.append(少了 括号+n);t.filee.setText(f11.getText();fr.close();catch(Exception e1)file1.setVisible(true);return open.getDirectory()+open.getFile();public boolean is_identifiers_key(JTextArea file3)if(flag1=0&(str.charAt(i)=65&str.charAt(i)=97&str.charAt(i)=122)|str.charAt(i)=_)c=(str.charAt(i);while(i=48&str.charAt(i)=57) while(i=48&str.charAt(i)=57)|str.charAt(i)=.) c=(str.charAt(i); currut=Character.toString(str.charAt(i); token=token+currut; i+;file3.append(+token+,+数字常量+,+line+行+)+n); /c=(str.charAt(i);token=1;flag=1; i-; return true; return false;public boolean is_oper(JTextArea file3)if(flag1=0&op.isoperator(str.charAt(i) while(ij&op.isoperator(str.charAt(i) c=(str.charAt(i); currut=Character.toString(str.charAt(i); i+; if(c=(|c=|c=)|c=|c=,) if(c=() e.push(c); if(c=) if(!e.empty() e.pop(); else System.out.println(少了 ( 括号); if(c=) e1.push(c); if(c=) if(!e1.empty() e1.pop(); else f11.append(少了 括号+line+n); file3.append(+c+,+操作运算符+,+line+行+)+n); else token=token+currut; if(token.equals(+)|token.equals(-) break; if(!token.equals() if(op.is_leagl_oper(token)file3.append(+token+,+操作运算符+,+line+行+)+n); else f11.append(第+line+行+i+列存在非法操作运算符+token);i-;token=1;flag=1;return true;return false;public boolean is_sym_String(JTextArea file3)if(flag1=0&sy.is_sym(str.charAt(i) c=(str.charAt(i);if(str.charAt(i)=|str.charAt(i)=)c=str.charAt(i);file3.append(+,+界定字符+,+line+行+)+n);i+;while(ij&str.charAt(i)!=&str.charAt(i)!=)if(str.charAt(i)=&str.charAt(i+1)=n)|(str.charAt(i)=%&(str.charAt(i+1)=f|str.charAt(i+1)=d|str.charAt(i+1)=c|str.charAt(i+1)=s)i=i+2;elsecurrut=Character.toString(str.charAt(i);token=token+currut;i+;file3.append(+token+,+字符串常量+,+line+行+)+n);file3.append(+c+,+界定字符+,+line+行+)+n);/i+;flag=1;else if(str.charAt(i)=) e2.push(str.charAt(i); if(str.charAt(i)=) if(!e2.empty() e2.pop(); else f11.append(少了 括号+n); file3.append(+str.charAt(i)+,+界定字符+,+line+行+)+n);flag=1;return true;return false;public void sv(JTextArea file1,Lexical_Frame t) save=new FileDialog(t,另存为,FileDialog.SAVE);save.setVisible(true);tryFile f1=new File(save.getDirectory(),save.getFile();FileWriter fw=new FileWriter(f1);BufferedWriter bw=new BufferedWriter(fw);String gt=file1.getText();String lines = gt.split(n);for (int j = 0; j lines.length; j+) bw.write(linesj + rn); bw.flush();fw.close();catch ( Exception e2)package 词法分析;public class key int i=0;String key_Word=new String32;public key()key_Word0=new String(auto);key_Word1=new String(break);key_Word2=new String(case);key_Word3=new String(char);key_Word4=new String(const);key_Word5=new String(continue);key_Word6=new String(default);key_Word7=new String(do);key_Word8=new String(double);key_Word9=new String(else);key_Word10=new String(enum);key_Word11=new String(extern);key_Word12=new String(float);key_Word13=new String(for);key_Word14=new String(goto);key_Word15=new String(if);key_Word16=new String(int);key_Word17=new String(long);key_Word18=new String(register);key_Word19=new String(return);key_Word20=new String(short);key_Word21=new String(signed);key_Word22=new String(static);key_Word23=new String(sizeof);key_Word24=new String(struct);key_Word25=new String(switch);key_Word26=new String(typedef);key_Word27=new String(union);key_Word28=new String(unsigned);key_Word29=new String(void);key_Word30=new String(volatile);key_Word31=new String(while);public int iskey(String s)for(i=0;i32;i+)if(s.equalsIgnoreCase(key_Wordi)return 1;return 0;package 词法分析;import java.awt.BorderLayout;import java.awt.Choice;import java.awt.Color;import java.awt.Font;import java.awt.GridLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.ItemEvent;import java.awt.event.ItemListener;import java.awt.event.TextEvent;import java.awt.event.TextListener;import javax.swing.JButton;import javax.swing.JDialog;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JMenu;import javax.swing.JMenuBar;import javax.swing.JMenuItem;import javax.swing.JPanel;import javax.swing.JScrollPane;import javax.swing.JTextArea;import 词法分析.function;SuppressWarnings(serial)public class Lexical_Frame extends JFrame implements ActionListener ,ItemListener,TextListener JButton sure=new JButton(是);JButton not=new JButton(否);JDialog Dg;JMenuBar text_MenuBar;JMenu menFile,menHlep,edit;JMenuItem file_open,file_Close,file_Exit,file_Save;JMenuItem contact_Us,about;JMenuItem font1,erro;Choice font,color,style;JLabel f;String s=,t; JFrame frame;int i=0,j,k=0;JTextArea file=new JTextArea();JTextArea file1=new JTextArea();JTextArea file2=new JTextArea();JTextArea file10=new JTextArea();JFrame frame1 = new JFrame();JTextArea filee=new JTextArea();JScrollPane scrollee=new JScrollPane(filee);JScrollPane scroll2=new JScrollPane(file10);JScrollPane scroll=new JScrollPane(file);JScrollPane scroll1=new JScrollPane(file2);public Lexical_Frame(int i)public Lexical_Frame() frame = new JFrame(); frame.setResizable(false); frame.setTitle(词法分析程序);file.setLineWrap(true);frame.add(scroll1,BorderLayout.CENTER); frame.add(scroll,BorderLayout.WEST); menFile=new JMenu(文件); edit=new JMenu(编辑); font1=new JMenuItem(字体); menHlep=new JMenu(帮助); file_open=new JMenuItem(打开); erro=new JMenuItem(查看错误文件); file_Close=new JMenuItem(关闭); file_Exit=new JMenuItem(退出); file_Save=new JMenuItem(保存); contact_Us=new JMenuItem(返回源文件); about=new JMenuItem(查看帮助); text_MenuBar=new JMenuBar(); menFile.add(file_open); menFile.add(file_Save); menFile.add(file_Close); menFile.add(file_Exit); menHlep.add(contact_Us); menHlep.add(about); edit.add(font1); edit.add(erro); file_Save.setEnabled(false); edit.setEnabled(false); file_open.addActionListener(this); file_Save.addActionListener(this); file_Close.addActionListener(this); sure.addActionListener(this); not.addActionListener(this); file_Exit.addActionListener(this); font1.addActionListener(this); erro.addActionListener(this); about.addActionListener(this); contact_Us.addActionListener(this); menHlep.add(contact_Us); text_MenuBar.add(menFile); text_MenuBar.add(edit); text_MenuBar.add(menHlep); frame.setJMenuBar(text_MenuBar); frame.setSize(600,600); file.setSize(300, 300); file2.setSize(300, 300); file.setVisible(false); file2.setVisible(false); file10.setVisible(false); frame.setVisible(true);public void actionPerformed(ActionEvent e) function function1=new function();frame1.add(scrollee,BorderLayout.CENTER); file.setForeground(Color.red) ; file2.setForeground(Color.red) ;if(e.getActionCommand()=打开)file.setText();file2.setText(); i=0; s=function1.op(file, this,file2); file.setVisible(true); file2.setVisible(true); file_Save.setEnabled(true); edit.setEnabled(true);if(e.getActionCommand()=退出) if(file1.getText().equalsIgnoreCase(file2.getText()=false) Dg=new JDialog(frame,确认,false);JPanel p=new JPanel();p.add(sure);p.add(not);JLabel prompt=new JLabel(希望把结果保存到文件吗？);Dg.setLayout(new BorderLayout();Dg.add(prompt,BorderLayout.CENTER);Dg.add(p,BorderLayout.SOUTH);Dg.setSize(200, 200);Dg.setVisible(true);elsefile2.setVisible(false);file.setVisible(false); if(e.getActionCommand().equals(是) Dg.setVisible(false);scroll.setVisible(false); function1.sv(file2, this); file1.setText(file2.getText(); if(e.getActionCommand().equals(否)file.setVisible(false);file2.setVisible(false);Dg.setVisible(false);file1.setText(file2.getText();if(e.getActionCommand().equals(查看错误文件)frame1.setSize(300, 300);frame1.setVisible(true);if(e.getActionCommand()=关闭) if(file1.getText().equalsIgnoreCase(file2.getText()=false)Dg=new JDialog(frame,确认,true);JPanel p=new JPanel();p.add(sure);p.add(not); JTextArea prompt=new JTextArea(文本已经被修改，希望把词法分析结果保存到文件吗);Dg.setLayout(new BorderLayout();Dg.add(prompt,BorderLayout.CENTER);Dg.add(p,BorderLayout.SOUTH);Dg.setSize(500, 200);Dg.setVisible(true); System.exit(0);if(e.getActionCommand()=保存)function1.sv(file2, this); file1.setText(file2.getText();if(e.getActionCommand().equals(字体) JDialog Dg1=new JDialog(frame,设置字体,false);font=new Choice(); color=new Choice(); style=new Choice(); JLabel size=new JLabel(字体大小); JLabel f=new JLabel(样式); JLabel cl=new JLabel(颜色); font.add(12); font.add(15); font.add(18); font.add(25); font.add(38); color.add(红色); color.add(蓝色); color.add(绿色); style.add(正常); style.add(粗体); style.add(斜体); Dg1.setLayout(new GridLayout(3,2,3,8); Dg1.add(size); Dg1.add(font); Dg1.add(f); Dg1.add(style); Dg1.add(cl); Dg1.add(color); font.addItemListener(this); style.addItemListener(this); color.addItemListener(this); Dg1.setSize(300, 200); Dg1.setVisible(true);if(e.getActionCommand()=返回源文件) scroll2.setVisible(false);scroll.setVisible(true);scroll1.setVisible(true);if(e.getActionCommand()=查看帮助)scroll.setVisible(false);scroll1.setVisible(false);scroll2.setVisible(true);int i=0; frame.add(scroll2,BorderLayout.CENTER);file10.setVisible(true);file10.append(关键字如下：+n);for(i=0;i32;i+)file10.append(function1.k.key_Wordi+n);file10.append(运算符如下：+n);for(i=0;i44;i+)file10.append(+function1.op.leagl_operi+n);file10.append(界定符如下：+n);for(i=0;i;oper_Word6=!;oper_Word7=;oper_Word8=+;oper_Word9=*;oper_Word10=&;oper_Word11=*;oper_Word12=%;oper_Word13=;oper_Word16=;oper_Word17=|;oper_Word18=,;oper_Word19=.;oper_Word20=:;oper_Word21=?;oper_Word22=/;leagl_oper0=new String();leagl_oper1=new String();leagl_oper2=new String();leagl_oper3=new String();leagl_oper4=new String(.);leagl_oper5=new String(-);leagl_oper6=new String(-);leagl_oper7=new String(+);leagl_oper8=new String(-);leagl_oper9=new String(*);leagl_oper10=new String(&);leagl_oper11=new String(!);leagl_oper12=new String();leagl_oper13=new String(/)