liuyang1.java

一个识别c语言关键字和大小写转换的程序

import java.applet.*;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.util.StringTokenizer;
import java.util.Arrays;
import java.util.Vector;
import java.io.*;

public class y2
{
 public static void main(String args[])
  {
   jiemian j= new jiemian();

  }
	
} 
class jiemian extends Frame implements ActionListener
{
 Button b1,b2,b3;
 TextArea t1;
 TextArea t2;
 Label l1,l2,l3;
 Color c1=new Color(210,125,165);
 
 public jiemian()
 {
  super("程序文本处理 作者 刘志刚");
  
  b1= new Button("保留字");
  b1.setBounds(150,200,80,20);
  b1.addActionListener(this);
  
  b2=new Button("注释字母");
  b2.setBounds(250,200,80,20);
  b2.addActionListener(this);
  
  b3=new Button("打开文件");
  b3.setBounds(50,200,80,20);
  b3.addActionListener(this);
  
  l1=new Label("请输入：");
  l1.setBounds(40,80,80,40);
  
  l2=new Label("要转换成大写的是：");
  l2.setBounds(40,180,100,20);
  
  l3=new Label("结果是：");
  l3.setBounds(40,320,100,20);
  
  t1=new TextArea();
  t1.setBounds(140,80,190,40);
  
  
  t2=new TextArea();
  t2.setBounds(140,300,190,100);
  
  
  this.add(b1);
  this.add(b2);
  this.add(l1);
  this.add(b3);
  this.add(l2);
  this.add(l3);
  this.add(t1);
  this.add(t2);
  
  this.setLayout(null);
  this.setBackground(c1);
  this.setSize (400,400);
  this.setVisible(true);
  
  this.addWindowListener
  (
     new WindowAdapter()
      {
      	public void windowClosing(WindowEvent evt)
          {System.exit(0);}
      }
  );

 }

 public void actionPerformed(ActionEvent e)
 {
  if(e.getSource()==b1)
  {
  	boolean bo1=true;
  	String s1=this.t1.getText();
  	StringTokenizer zhizhen=new StringTokenizer(s1," ,;()");
  	Vector v1=new Vector();
  	//Vector v2=new Vector();
  	String[] ss1={"auto","break","case","char","const","continue","default","do","double",
  	"else","enum","extern","float","for","goto","if","int","long","register","return",
  	"short","signed","sizeof","static","struct","switch","typedef","union","unsigned",
  	"void","volatile","while"};
  	int i,k,h;
  	for(k=0;k<32;k++)
  	{
  	  v1.add(ss1[k]);
  	 	
  	}
  	h=zhizhen.countTokens();
  	
  	while(h>0)
  	{ String s2=zhizhen.nextToken();
  	  String s3=s2;
  	   
      System.out.println(s2);
  	 bo1=v1.contains(s2);
     h--;
     if(bo1)
     { 
     	s2=s2.toUpperCase();
     	s1=s1.replaceAll(s3,s2);
     	
     }
     
    } 
     this.t2.setText(s1+"\n");
    
    }
    if(e.getSource()==b2)
    {//boolean bo2=true;
  	 String s4=this.t1.getText();
  	 int a,b;
  	 a=s4.indexOf("/*");
     b=s4.indexOf("*/");
     if(a>=0||b>0)
     {String s5=s4.substring(a+2,b);
     String s6=s5;
     s5=s5.toUpperCase();
     s4=s4.replaceAll(s6,s5);
     this.t2.setText(s4);	
    
    }
    else{this.t2.setText(s4);
    }    
   }
  if(e.getSource()==b3)
  {
  	int b;
  	byte buffer[]=new byte[2500];
  	try
  	{
  		FileInputStream readfile=new FileInputStream("d:\\example1.c");
  		b=readfile.read(buffer,0,2500);
        
  	try
  	{
  		String str=new String(buffer,0,b,"Default");
  		t1.setText(str);
  	}
  	catch(UnsupportedEncodingException ey)
  	{
  		t1.setText("the encoding was not found:"+ey);
 	}
  	
  }
  catch(IOException ey)
  {
  	t1.setText("file read error");
  }
 }
}
}